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1.7mm Thickness Multi-Layer Steel (MLS) Cylinder Head Gasket for Toyota 14B Diesel Engine
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1.7mm Thickness Multi-Layer Steel (MLS) Cylinder Head Gasket for Toyota 14B Diesel Engine
  • name
  • name

1.7mm Thickness Multi-Layer Steel (MLS) Cylinder Head Gasket for Toyota 14B Diesel Engine

MOQ: 10 pcs
Price: Negotiable
Standard Packaging: Neutral Package or as customers’ request
Delivery Period: 5-8 Work Days
Payment Method: T/T,Western Union
Supply Capacity: 10000 pcs/month
Detail Information
Product Description
Detail Information
Place of Origin
China
Brand Name
YIMI
Certification
ISO/TS16949
Model Number
Toyota 14B Diesel 4.1L Engine Dyna Coaster
OEM Part Number:
11115-58100
Engine Bore Diameter:
102 Mm
Gasket Diameter:
103 Mm
Compressed Thickness:
1.7 Mm
Gasket Width:
195 Mm
Gasket Length:
510 Mm
Gasket Weight:
319 G
Gasket Type:
Multi-Layer Steel (MLS)
Highlight:

1.7mm MLS cylinder head gasket

,

Toyota 14B diesel engine gasket

,

multi-layer steel head gasket

Product Description
Cylinder Head Gasket 11115-58100 For Toyota 14B Diesel 4.1L Engine Dyna Coaster
Cylinder Head Gasket 11115-58100 For Toyota 14B Diesel Engine
The cylinder head gasket carrying Toyota OEM number 11115-58100 (also 1111558100) seals the interface between the cylinder head and engine block on the Toyota 14B 4.1L inline‑4 direct‑injection diesel engine. This gasket is the thickest variant (1.7 mm) in Toyota's three‑thickness series for the B‑family diesel engine, selected when piston protrusion measurements call for the maximum thickness.
The 14B is a 4,110 cc inline‑4 naturally aspirated diesel engine with a bore of 102 mm and stroke of 125 mm, a compression ratio of 20.8:1, and power outputs ranging from approximately 98 to 103 hp. The engine was produced from the mid‑1980s until the early 2000s and is known for its reliability, mechanical injection system, and heavy‑duty cast‑iron construction.
This gasket is constructed from multi‑layer steel (MLS) — multiple precision‑stamped embossed layers of stainless steel designed specifically for the 14B's diesel combustion characteristics. The gasket features a diameter of 103 mm, a width of 195 mm, and a length of 510 mm. Its compressed thickness is 1.7 mm, making it the thickest gasket available for the 14B engine family.
Toyota 14B Cylinder Head Gasket 11115-58100
Product Specifications
Part Number: 11115-58100 Product Name: Cylinder Head Gasket
Car Model: Toyota Dyna Coaster Engine Model: Toyota 14B Diesel 4.1L
Condition: 100% Brand New Size: Standard
Weight: Standard Origin: China Mainland
Main Market: Middle East, Asia, Africa, South America, North America & Europe
Package: Neutral Packing Or Make It As Requested
Material: High-strength aluminum alloy & precision bearings
Cooling Type: Engine coolant circulation
Installation: Direct OEM replacement
Quality Standard: OEM equivalent / ISO quality control
Thickness Grades - 14B (B‑Series) Diesel Family
The Toyota 14B diesel engine uses three different head gasket thicknesses depending on piston protrusion measurement - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC). The correct thickness is determined by the highest protrusion measurement across all four cylinders.
OE Number Thickness Production Period Application
11115-58070 1.50 mm 08.1988 - 05.1995 For lowest piston protrusion
11115-58090 1.60 mm 08.1988 - 05.1995 For medium piston protrusion
11115-58100 1.70 mm 08.1988 - 05.1995 For highest piston protrusion
Selecting the incorrect thickness will alter the compression height, affecting compression ratio and potentially causing valve‑to‑piston clearance issues on this high‑compression diesel engine.
Applications
This Toyota 14B cylinder head gasket 11115-58100 directly replaces the factory sealing component in the following configurations:
Dyna / Toyoace (BU chassis -- 08.1988 - 05.1995)
Chassis Applicable Model Engine Family
BU66 Dyna / Toyoace 14B
BU67 Dyna / Toyoace 14B
BU72 Dyna / Toyoace 14B
BU73 Dyna / Toyoace 14B
BU74 Dyna / Toyoace 14B
BU78 Dyna / Toyoace 14B
BU87 Dyna / Toyoace 14B
BU88 Dyna / Toyoace 14B
BU91 Dyna / Toyoace 14B
BU94 Dyna / Toyoace 14B
BU96 Dyna / Toyoace 14B
Coaster (B40 / B50 -- 1993 onward)
Model Chassis / Series Engine Years
Coaster Bus B40, B50 14B 1993-present
Additional B‑Series Engine Compatibility
The 14B cylinder head gasket is also compatible with the following Toyota B‑family diesel engines:
Engine Code Displacement Bore Application
3B (3.4L) 3,431 cc 102 mm Dyna, Coaster, Land Cruiser
11B (3.0L) 3,000 cc 102 mm Dyna, Coaster
13B (3.6L) 3,600 cc 102 mm Dyna, Coaster
13B‑T 3,600 cc 102 mm Dyna, Coaster, Land Cruiser
14B‑T 4,100 cc 102 mm Turbocharged variant (verify fitment)
15B (4.1L) 4,104 cc 102 mm Dyna, Coaster, Land Cruiser Prado
15B‑F 4,104 cc 102 mm Dyna, Coaster
Important fitment note: B‑series diesel engines all share the same 102 mm bore, making this 103 mm gasket physically compatible across the family. However, the 11115-58100 is specifically listed in the Toyota parts catalogue for the 14B engine in BU‑chassis Dyna vehicles. For 15B or 3B applications, cross‑reference the original part number before ordering.
Features & Benefits
Multi‑Layer Steel (MLS) Construction for High‑Compression Diesel
The gasket is manufactured from multiple precision‑stamped embossed layers of stainless steel. In the 14B engine - with a compression ratio of 20.8:1 - the MLS design withstands the sustained cylinder pressures of high‑compression diesel operation. The combination of a cast‑iron cylinder head and cast‑iron block creates specific demands for a gasket that maintains consistent clamping force through thousands of thermal cycles. The stainless steel construction resists corrosion from combustion by‑products and maintains its spring force at exhaust gas temperatures reaching 800 °C.
1.7 mm Thickness - Thickest Option in the 14B Family
This gasket delivers a compressed thickness of 1.7 mm, the thickest available for the 14B engine. It is identified in the Toyota parts catalogue with the Japanese notation 厚さ＝１．７０ (thickness = 1.70). It is required when piston protrusion measurements from the engine rebuild exceed the range covered by thinner 1.50 mm and 1.60 mm gaskets.
Precision 103 mm Bore for Gas‑Tight Combustion Sealing
The gasket features a 103 mm diameter, precisely sized to accommodate the 14B's 102 mm cylinder bore with the required sealing margin. Each cylinder opening is surrounded by a stainless steel fire ring that is pre‑compressed during manufacturing. When the cylinder head is torqued to specification, the fire ring compresses further, creating a gas‑tight seal around the combustion chamber.
OE‑Grade Replacement for 14B Dyna and Coaster
This gasket carries the exact Toyota part number 11115-58100 and is listed directly in the Toyota parts catalogue for 14B engines in BU‑chassis Dyna vehicles and B40/B50 Coaster buses. For the same 14B engine family, the Toyota catalogue also lists two thinner gaskets: 11115-58070 (1.50 mm) and 11115-58090 (1.60 mm). This 1.70 mm variant is the thickest available.
OE Interchange
The 11115-58100 gasket cross‑references directly to aftermarket equivalents: GLASER H21049-20, and AJUSA 101155. When a customer searches by any of these numbers - whether in OE parts look‑ups, aftermarket cross‑reference databases, or by the original gasket's markings - this listing provides the correct fitment. These aftermarket options are manufactured with the same 1.7 mm compressed thickness as the genuine Toyota gasket.
Proven on High‑Compression 14B Diesel Cycles
The 14B's 20.8:1 compression ratio generates substantial cylinder pressures. An MLS gasket is the only design that reliably seals these pressures for the full service life. The steel layers maintain consistent clamping force even after thousands of thermal cycles from cold start to full operating temperature.
100% Toyota Genuine - Made in Japan
This gasket is a genuine Toyota OEM component, manufactured to the original engineering specifications used in 14B engine assembly at the factory. The "Made in Japan" origin ensures the component meets the material and dimensional requirements expected by the Toyota factory warranty, including the critical 1.7 mm thickness requirement for the 14B engine family.
Quality Control & Verification
Each batch of the Toyota cylinder head gasket 11115-58100 meets Toyota's original equipment quality standards with the following verifications:
QC Item Verification Method
Fire ring bore alignment Precision tooling verification - 103 mm ±0.03 mm tolerance against OE drawing
Gasket thickness (compressed) Digital micrometer at multiple points - verified against 1.70 mm specification
Material composition Spectrographic analysis - stainless steel grade confirmed to Toyota material standard
Elastomer coating integrity Visual and adhesion test - no voids, cracks, or missing coating on sealing beads
Full dimensional inspection Tooling verification - bolt hole alignment, water jacket, and oil ports
Anti‑corrosion treatment VCI (Vapor Corrosion Inhibitor) sealed bag for long‑term storage
A certificate of conformance (COC) with batch material analysis is available for wholesale orders.
Installation & Maintenance Recommendations
⚠️ IMPORTANT: The 14B uses torque‑to‑yield (stretch) cylinder head bolts. These are single‑use fasteners and must be replaced with new units whenever the cylinder head is removed. Reusing old bolts risks uneven clamping, head gasket failure, and cylinder head warping.
Why thickness selection matters for the 14B engine:
The 14B is a high‑compression diesel engine (20.8:1). The correct head gasket thickness is determined by piston protrusion - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC). The highest measurement recorded determines the required gasket grade.
A total of three gaskets of different thicknesses are available from Toyota for the 14B engine (1.50 mm, 1.60 mm, and 1.70 mm).
If the selected gasket is too thin for the measured piston protrusion, the compression height will be reduced, increasing the risk of contact between valves and pistons. Conversely, if the gasket is too thick, the compression ratio will drop, reducing engine power and fuel economy.
Recommended Replacement Indicators (14B‑specific symptoms)
Symptom Diagnosis
Gradual coolant loss with no visible external leak Coolant escaping past fire ring into combustion chamber
White or grey steam from exhaust that continues after engine is warm Coolant burning in combustion chamber - head gasket breach
Bubbles in coolant overflow bottle with engine running (or when revved) Combustion gases entering cooling system - definitive sign of head gasket breach
Pressure in cooling system - hoses remain hard even when engine is cold Combustion gases pressurising cooling system even when engine is off
Milky oil residue under filler cap or on dipstick Coolant mixed with engine oil - internal gasket failure
Engine overheating without another clear cause Combustion gases interfering with coolant flow
Procedural notes when using this gasket (14B engine)
When performing a head gasket replacement on a 14B engine, observe the following:
  • Select the correct gasket thickness from Toyota's three‑grade system. This is 11115-58100 (1.70 mm). Do not guess the grade based on vehicle mileage - measure piston protrusion with a dial gauge and select the grade corresponding to the highest measurement recorded.
  • Always replace cylinder head bolts with new genuine‑spec bolts. Torque‑to‑yield bolts cannot be reused. Follow the Toyota workshop manual for the correct tightening sequence.
  • Check cylinder head and block surfaces for warpage using a precision straight edge and feeler gauge. The 14B specification for head flatness is ≤ 0.05 mm across the full length. Warpage beyond this requires resurfacing, which will change the piston‑protrusion measurement.
  • Install the gasket dry - no additional sealants. The MLS gasket's elastomer coating is heat‑activated and must make direct contact with clean, oil‑free surfaces.
  • Replace the timing gears / front cover gasket when reassembling - the B‑series engine uses gear‑driven timing, and the front cover may need to be removed.
  • Flush the cooling system and fill with fresh Toyota Long Life Coolant or ethylene‑glycol coolant mixed 50/50 with distilled water.
  • Consider professional installation. Head gasket replacement on the 14B requires specialised tools: a torque‑angle gauge, a precision straight edge, a dial gauge for piston‑protrusion measurement, and access to the Toyota Repair Manual. Expect 6-8 hours of labour in a professional workshop for a complete head gasket replacement.
Maintenance schedule for 14B engines
Service Item Interval
Replace engine coolant Every 4-5 years or 80,000-100,000 km - degraded coolant accelerates head gasket corrosion
Check for coolant loss and pressurised hoses Monthly - early detection prevents head warping
Address any overheating event immediately Prolonged overheating will cause head gasket failure
When cylinder head is removed for any reason Always replace head bolts and the full set of gaskets
Packaging & Supply
  • Individual packaging: Sealed in anti‑static VCI bag, foam‑lined carton
  • Carton dimensions: Approximately 52 × 20 × 2 cm
  • Net weight: 319 g
  • Master carton: 50 units per export carton (palletisable)
  • Lead time: 3-7 working days for stock orders; 15-25 days for production orders above 200 pieces
  • Minimum order quantity: 1 piece (sample order available)
  • Shipping methods: FedEx, UPS, DHL for sample quantities; sea freight (LCL/FCL) from Shanghai, Ningbo, or Guangzhou ports
  • H/S Code: 8484.10
For workshops performing a full top‑end service, the supplier also stocks matching 14B cylinder head bolts, valve stem seal sets, rocker cover gaskets, and full overhaul gasket sets (04111 series) for the same engine family. Contact the sales team with your forecasted monthly volume and destination port for a tiered price list.
Quick Summary
The Toyota 14B cylinder head gasket 11115-58100 is an OEM‑specification MLS replacement for the 4.1L diesel engine found in Dyna (BU66-BU96 chassis) and Coaster (B40/B50) vehicles from 1988 to 1995. The gasket features a 103 mm diameter, 1.7 mm compressed thickness - the thickest option in the 14B family - and is listed directly in the Toyota parts catalogue with the notation 厚さ＝１．７０. It is cross‑referenced with aftermarket equivalents GLASER H21049-20, and AJUSA 101155.
Before ordering: This gasket is for the 14B diesel engine and is not compatible with Toyota's 2RZ or 3RZ petrol engines. Confirm that your original gasket thickness is 1.7 mm or verify piston protrusion before ordering, as the thinner 1.50 mm (11115-58070) and 1.60 mm (11115-58090) options are also available for the 14B engine.
Order a sample unit today - restore your 14B engine to factory sealing with the correct 1.7 mm thickness grade.
Tags: 

Toyota RAV4 headlamp assembly,  

Toyota Starlet cylinder head with warranty,  

Lexus GS350 replacement motor

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1.7mm Thickness Multi-Layer Steel (MLS) Cylinder Head Gasket for Toyota 14B Diesel Engine
  • name
  • name
1.7mm Thickness Multi-Layer Steel (MLS) Cylinder Head Gasket for Toyota 14B Diesel Engine
MOQ: 10 pcs
Price: Negotiable
Standard Packaging: Neutral Package or as customers’ request
Delivery Period: 5-8 Work Days
Payment Method: T/T,Western Union
Supply Capacity: 10000 pcs/month
Detail Information
Product Description
Detail Information
Place of Origin
China
Brand Name
YIMI
Certification
ISO/TS16949
Model Number
Toyota 14B Diesel 4.1L Engine Dyna Coaster
OEM Part Number:
11115-58100
Engine Bore Diameter:
102 Mm
Gasket Diameter:
103 Mm
Compressed Thickness:
1.7 Mm
Gasket Width:
195 Mm
Gasket Length:
510 Mm
Gasket Weight:
319 G
Gasket Type:
Multi-Layer Steel (MLS)
Minimum Order Quantity:
10 pcs
Price:
Negotiable
Packaging Details:
Neutral Package or as customers’ request
Delivery Time:
5-8 Work Days
Payment Terms:
T/T,Western Union
Supply Ability:
10000 pcs/month
Highlight

1.7mm MLS cylinder head gasket

,

Toyota 14B diesel engine gasket

,

multi-layer steel head gasket

Product Description
Cylinder Head Gasket 11115-58100 For Toyota 14B Diesel 4.1L Engine Dyna Coaster
Cylinder Head Gasket 11115-58100 For Toyota 14B Diesel Engine
The cylinder head gasket carrying Toyota OEM number 11115-58100 (also 1111558100) seals the interface between the cylinder head and engine block on the Toyota 14B 4.1L inline‑4 direct‑injection diesel engine. This gasket is the thickest variant (1.7 mm) in Toyota's three‑thickness series for the B‑family diesel engine, selected when piston protrusion measurements call for the maximum thickness.
The 14B is a 4,110 cc inline‑4 naturally aspirated diesel engine with a bore of 102 mm and stroke of 125 mm, a compression ratio of 20.8:1, and power outputs ranging from approximately 98 to 103 hp. The engine was produced from the mid‑1980s until the early 2000s and is known for its reliability, mechanical injection system, and heavy‑duty cast‑iron construction.
This gasket is constructed from multi‑layer steel (MLS) — multiple precision‑stamped embossed layers of stainless steel designed specifically for the 14B's diesel combustion characteristics. The gasket features a diameter of 103 mm, a width of 195 mm, and a length of 510 mm. Its compressed thickness is 1.7 mm, making it the thickest gasket available for the 14B engine family.
Toyota 14B Cylinder Head Gasket 11115-58100
Product Specifications
Part Number: 11115-58100 Product Name: Cylinder Head Gasket
Car Model: Toyota Dyna Coaster Engine Model: Toyota 14B Diesel 4.1L
Condition: 100% Brand New Size: Standard
Weight: Standard Origin: China Mainland
Main Market: Middle East, Asia, Africa, South America, North America & Europe
Package: Neutral Packing Or Make It As Requested
Material: High-strength aluminum alloy & precision bearings
Cooling Type: Engine coolant circulation
Installation: Direct OEM replacement
Quality Standard: OEM equivalent / ISO quality control
Thickness Grades - 14B (B‑Series) Diesel Family
The Toyota 14B diesel engine uses three different head gasket thicknesses depending on piston protrusion measurement - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC). The correct thickness is determined by the highest protrusion measurement across all four cylinders.
OE Number Thickness Production Period Application
11115-58070 1.50 mm 08.1988 - 05.1995 For lowest piston protrusion
11115-58090 1.60 mm 08.1988 - 05.1995 For medium piston protrusion
11115-58100 1.70 mm 08.1988 - 05.1995 For highest piston protrusion
Selecting the incorrect thickness will alter the compression height, affecting compression ratio and potentially causing valve‑to‑piston clearance issues on this high‑compression diesel engine.
Applications
This Toyota 14B cylinder head gasket 11115-58100 directly replaces the factory sealing component in the following configurations:
Dyna / Toyoace (BU chassis -- 08.1988 - 05.1995)
Chassis Applicable Model Engine Family
BU66 Dyna / Toyoace 14B
BU67 Dyna / Toyoace 14B
BU72 Dyna / Toyoace 14B
BU73 Dyna / Toyoace 14B
BU74 Dyna / Toyoace 14B
BU78 Dyna / Toyoace 14B
BU87 Dyna / Toyoace 14B
BU88 Dyna / Toyoace 14B
BU91 Dyna / Toyoace 14B
BU94 Dyna / Toyoace 14B
BU96 Dyna / Toyoace 14B
Coaster (B40 / B50 -- 1993 onward)
Model Chassis / Series Engine Years
Coaster Bus B40, B50 14B 1993-present
Additional B‑Series Engine Compatibility
The 14B cylinder head gasket is also compatible with the following Toyota B‑family diesel engines:
Engine Code Displacement Bore Application
3B (3.4L) 3,431 cc 102 mm Dyna, Coaster, Land Cruiser
11B (3.0L) 3,000 cc 102 mm Dyna, Coaster
13B (3.6L) 3,600 cc 102 mm Dyna, Coaster
13B‑T 3,600 cc 102 mm Dyna, Coaster, Land Cruiser
14B‑T 4,100 cc 102 mm Turbocharged variant (verify fitment)
15B (4.1L) 4,104 cc 102 mm Dyna, Coaster, Land Cruiser Prado
15B‑F 4,104 cc 102 mm Dyna, Coaster
Important fitment note: B‑series diesel engines all share the same 102 mm bore, making this 103 mm gasket physically compatible across the family. However, the 11115-58100 is specifically listed in the Toyota parts catalogue for the 14B engine in BU‑chassis Dyna vehicles. For 15B or 3B applications, cross‑reference the original part number before ordering.
Features & Benefits
Multi‑Layer Steel (MLS) Construction for High‑Compression Diesel
The gasket is manufactured from multiple precision‑stamped embossed layers of stainless steel. In the 14B engine - with a compression ratio of 20.8:1 - the MLS design withstands the sustained cylinder pressures of high‑compression diesel operation. The combination of a cast‑iron cylinder head and cast‑iron block creates specific demands for a gasket that maintains consistent clamping force through thousands of thermal cycles. The stainless steel construction resists corrosion from combustion by‑products and maintains its spring force at exhaust gas temperatures reaching 800 °C.
1.7 mm Thickness - Thickest Option in the 14B Family
This gasket delivers a compressed thickness of 1.7 mm, the thickest available for the 14B engine. It is identified in the Toyota parts catalogue with the Japanese notation 厚さ＝１．７０ (thickness = 1.70). It is required when piston protrusion measurements from the engine rebuild exceed the range covered by thinner 1.50 mm and 1.60 mm gaskets.
Precision 103 mm Bore for Gas‑Tight Combustion Sealing
The gasket features a 103 mm diameter, precisely sized to accommodate the 14B's 102 mm cylinder bore with the required sealing margin. Each cylinder opening is surrounded by a stainless steel fire ring that is pre‑compressed during manufacturing. When the cylinder head is torqued to specification, the fire ring compresses further, creating a gas‑tight seal around the combustion chamber.
OE‑Grade Replacement for 14B Dyna and Coaster
This gasket carries the exact Toyota part number 11115-58100 and is listed directly in the Toyota parts catalogue for 14B engines in BU‑chassis Dyna vehicles and B40/B50 Coaster buses. For the same 14B engine family, the Toyota catalogue also lists two thinner gaskets: 11115-58070 (1.50 mm) and 11115-58090 (1.60 mm). This 1.70 mm variant is the thickest available.
OE Interchange
The 11115-58100 gasket cross‑references directly to aftermarket equivalents: GLASER H21049-20, and AJUSA 101155. When a customer searches by any of these numbers - whether in OE parts look‑ups, aftermarket cross‑reference databases, or by the original gasket's markings - this listing provides the correct fitment. These aftermarket options are manufactured with the same 1.7 mm compressed thickness as the genuine Toyota gasket.
Proven on High‑Compression 14B Diesel Cycles
The 14B's 20.8:1 compression ratio generates substantial cylinder pressures. An MLS gasket is the only design that reliably seals these pressures for the full service life. The steel layers maintain consistent clamping force even after thousands of thermal cycles from cold start to full operating temperature.
100% Toyota Genuine - Made in Japan
This gasket is a genuine Toyota OEM component, manufactured to the original engineering specifications used in 14B engine assembly at the factory. The "Made in Japan" origin ensures the component meets the material and dimensional requirements expected by the Toyota factory warranty, including the critical 1.7 mm thickness requirement for the 14B engine family.
Quality Control & Verification
Each batch of the Toyota cylinder head gasket 11115-58100 meets Toyota's original equipment quality standards with the following verifications:
QC Item Verification Method
Fire ring bore alignment Precision tooling verification - 103 mm ±0.03 mm tolerance against OE drawing
Gasket thickness (compressed) Digital micrometer at multiple points - verified against 1.70 mm specification
Material composition Spectrographic analysis - stainless steel grade confirmed to Toyota material standard
Elastomer coating integrity Visual and adhesion test - no voids, cracks, or missing coating on sealing beads
Full dimensional inspection Tooling verification - bolt hole alignment, water jacket, and oil ports
Anti‑corrosion treatment VCI (Vapor Corrosion Inhibitor) sealed bag for long‑term storage
A certificate of conformance (COC) with batch material analysis is available for wholesale orders.
Installation & Maintenance Recommendations
⚠️ IMPORTANT: The 14B uses torque‑to‑yield (stretch) cylinder head bolts. These are single‑use fasteners and must be replaced with new units whenever the cylinder head is removed. Reusing old bolts risks uneven clamping, head gasket failure, and cylinder head warping.
Why thickness selection matters for the 14B engine:
The 14B is a high‑compression diesel engine (20.8:1). The correct head gasket thickness is determined by piston protrusion - the distance each piston rises above the cylinder block deck at Top Dead Center (TDC). The highest measurement recorded determines the required gasket grade.
A total of three gaskets of different thicknesses are available from Toyota for the 14B engine (1.50 mm, 1.60 mm, and 1.70 mm).
If the selected gasket is too thin for the measured piston protrusion, the compression height will be reduced, increasing the risk of contact between valves and pistons. Conversely, if the gasket is too thick, the compression ratio will drop, reducing engine power and fuel economy.
Recommended Replacement Indicators (14B‑specific symptoms)
Symptom Diagnosis
Gradual coolant loss with no visible external leak Coolant escaping past fire ring into combustion chamber
White or grey steam from exhaust that continues after engine is warm Coolant burning in combustion chamber - head gasket breach
Bubbles in coolant overflow bottle with engine running (or when revved) Combustion gases entering cooling system - definitive sign of head gasket breach
Pressure in cooling system - hoses remain hard even when engine is cold Combustion gases pressurising cooling system even when engine is off
Milky oil residue under filler cap or on dipstick Coolant mixed with engine oil - internal gasket failure
Engine overheating without another clear cause Combustion gases interfering with coolant flow
Procedural notes when using this gasket (14B engine)
When performing a head gasket replacement on a 14B engine, observe the following:
  • Select the correct gasket thickness from Toyota's three‑grade system. This is 11115-58100 (1.70 mm). Do not guess the grade based on vehicle mileage - measure piston protrusion with a dial gauge and select the grade corresponding to the highest measurement recorded.
  • Always replace cylinder head bolts with new genuine‑spec bolts. Torque‑to‑yield bolts cannot be reused. Follow the Toyota workshop manual for the correct tightening sequence.
  • Check cylinder head and block surfaces for warpage using a precision straight edge and feeler gauge. The 14B specification for head flatness is ≤ 0.05 mm across the full length. Warpage beyond this requires resurfacing, which will change the piston‑protrusion measurement.
  • Install the gasket dry - no additional sealants. The MLS gasket's elastomer coating is heat‑activated and must make direct contact with clean, oil‑free surfaces.
  • Replace the timing gears / front cover gasket when reassembling - the B‑series engine uses gear‑driven timing, and the front cover may need to be removed.
  • Flush the cooling system and fill with fresh Toyota Long Life Coolant or ethylene‑glycol coolant mixed 50/50 with distilled water.
  • Consider professional installation. Head gasket replacement on the 14B requires specialised tools: a torque‑angle gauge, a precision straight edge, a dial gauge for piston‑protrusion measurement, and access to the Toyota Repair Manual. Expect 6-8 hours of labour in a professional workshop for a complete head gasket replacement.
Maintenance schedule for 14B engines
Service Item Interval
Replace engine coolant Every 4-5 years or 80,000-100,000 km - degraded coolant accelerates head gasket corrosion
Check for coolant loss and pressurised hoses Monthly - early detection prevents head warping
Address any overheating event immediately Prolonged overheating will cause head gasket failure
When cylinder head is removed for any reason Always replace head bolts and the full set of gaskets
Packaging & Supply
  • Individual packaging: Sealed in anti‑static VCI bag, foam‑lined carton
  • Carton dimensions: Approximately 52 × 20 × 2 cm
  • Net weight: 319 g
  • Master carton: 50 units per export carton (palletisable)
  • Lead time: 3-7 working days for stock orders; 15-25 days for production orders above 200 pieces
  • Minimum order quantity: 1 piece (sample order available)
  • Shipping methods: FedEx, UPS, DHL for sample quantities; sea freight (LCL/FCL) from Shanghai, Ningbo, or Guangzhou ports
  • H/S Code: 8484.10
For workshops performing a full top‑end service, the supplier also stocks matching 14B cylinder head bolts, valve stem seal sets, rocker cover gaskets, and full overhaul gasket sets (04111 series) for the same engine family. Contact the sales team with your forecasted monthly volume and destination port for a tiered price list.
Quick Summary
The Toyota 14B cylinder head gasket 11115-58100 is an OEM‑specification MLS replacement for the 4.1L diesel engine found in Dyna (BU66-BU96 chassis) and Coaster (B40/B50) vehicles from 1988 to 1995. The gasket features a 103 mm diameter, 1.7 mm compressed thickness - the thickest option in the 14B family - and is listed directly in the Toyota parts catalogue with the notation 厚さ＝１．７０. It is cross‑referenced with aftermarket equivalents GLASER H21049-20, and AJUSA 101155.
Before ordering: This gasket is for the 14B diesel engine and is not compatible with Toyota's 2RZ or 3RZ petrol engines. Confirm that your original gasket thickness is 1.7 mm or verify piston protrusion before ordering, as the thinner 1.50 mm (11115-58070) and 1.60 mm (11115-58090) options are also available for the 14B engine.
Order a sample unit today - restore your 14B engine to factory sealing with the correct 1.7 mm thickness grade.
Tags: 

Toyota RAV4 headlamp assembly,

Toyota Starlet cylinder head with warranty,

Lexus GS350 replacement motor

Yimi (Guangzhou) Automotive Parts Co, Ltd
4F, 7th, No. 2, South Jinguu Road, Huadong Town, Huadu District, Guangzhou City
Tel: +86-17820569171
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