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Corrosion-resistant aluminium alloy oil cooler assembly with plate-type heat exchanger for Toyota 1HZ 4.2L diesel engine OEM specification
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Corrosion-resistant aluminium alloy oil cooler assembly with plate-type heat exchanger for Toyota 1HZ 4.2L diesel engine OEM specification
  • name
  • name
  • name

Corrosion-resistant aluminium alloy oil cooler assembly with plate-type heat exchanger for Toyota 1HZ 4.2L diesel engine OEM specification

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 Land Cruiser 70/80 Coaster 1HZ
Construction:
Plate-type Heat Exchanger With Multiple Cooling Plates
Housing Material:
Corrosion-resistant Aluminium Alloy
Cooling Type:
Liquid-to-liquid (oil-to-coolant)
Weight:
Approximately 2.5–3.0 Kg
Engine Compatibility:
Toyota 1HZ (4.2L Inline-six Diesel), 1HD Series
Bore:
94.0 Mm
Stroke:
100.0 Mm
Carton Dimensions:
28 × 20 × 15 Cm
Highlight:

Corrosion-resistant aluminium alloy oil cooler

,

Toyota 1HZ diesel engine oil cooler

,

Plate-type heat exchanger oil cooler

Product Description
Oil Cooler Assembly 15710-17010 For Toyota Land Cruiser 70/80 Coaster 1HZ 4.2L Diesel
The oil cooler assembly carrying Toyota OEM number 15710-17010 is a direct factory-spec replacement for the engine oil cooler on the Toyota 1HZ 4.2L inline-six diesel engine. This component is fitted to a wide range of Toyota's most durable commercial and off-road vehicles, including the Land Cruiser 70 Series, Land Cruiser 80 Series, and Coaster bus.
Toyota 1HZ 4.2L Diesel Engine Oil Cooler Assembly 15710-17010
Product Specifications
Part Number: 15710-17010
Product Name: Oil Cooler Assembly
Car Model: Toyota Land Cruiser 70/80 Coaster
Engine Model: Toyota 1HZ
Condition: 100% Brand New
Origin: China Mainland
Material: High-strength aluminum alloy & precision bearings
Cooling Type: Engine coolant circulation
Installation: Direct OEM replacement
Quality Standard: OEM equivalent / ISO quality control
Vehicle & Engine Applications
This Toyota 1HZ oil cooler assembly 15710-17010 directly replaces the factory component in the following configurations:
Vehicle Model Chassis Engine Production Period
Toyota Land Cruiser 70 Series HZJ70, HZJ71, HZJ73, HZJ77 1HZ 4.2L diesel 05.1993 - 08.1999
Toyota Land Cruiser 70 Series HZJ73HV 1HZ 4.2L diesel 11.1990 - 05.1993
Toyota Land Cruiser 80 Series HZJ80, HDJ80 1HZ / 1HD-T 4.2L diesel 01.1990 - 01.1995
Toyota Coaster Bus HZB40, HZB50 1HZ 4.2L diesel 07.1999 - 03.2001
Additional applications confirmed by Toyota EPC data:
  • Land Cruiser HZJ81V
  • Coaster HZB60, HZB70
  • Coaster HZB41, HZB40
Important fitment note: This oil cooler is also compatible with the 1HD-T and 1HD-FT turbo diesel engines, which share the same oil cooler architecture as the 1HZ. However, always verify fitment by matching your original part number or consulting the Toyota EPC for your specific chassis code and production date.
Why the 1HZ Oil Cooler Fails
The Toyota 1HZ engine is legendary for its durability. The oil cooler, however, is a serviceable component that can fail over time - particularly on high-mileage vehicles exceeding 300,000 km.
Common failure modes include:
  1. Internal gasket failure: The sealing rings between the oil cooler and the engine block degrade over time, allowing oil to leak into the coolant system or coolant to enter the oil system.
  2. Clogged coolant passages: Scale, corrosion, and debris accumulation inside the oil cooler's coolant passages reduces heat transfer efficiency.
  3. External corrosion: The aluminium housing can corrode externally, particularly in vehicles exposed to road salt or coastal environments.
  4. Relief valve failure: The oil cooler relief valve can stick or fail, allowing oil to bypass the cooler entirely.
Features & Benefits
  • Plate-Type Heat Exchanger Design: Efficient oil cooling with large surface area for heat transfer in a compact package
  • Prevents Oil-Coolant Cross-Contamination: Restores critical separation between oil and coolant systems
  • Corrosion-Resistant Aluminium Alloy Housing: Provides resistance to coolant additives and thermal cycling
  • Direct OE Replacement: No modifications, adapters, or additional fabrication required
  • Comprehensive OE Interchange Coverage: Interchangeable with 15710-17020, 15710-17011, and 15710-17021
  • Proven on Legendary 1HZ Engine Platform: Critical component for achieving engine longevity of 500,000+ km
  • IATF 16949 / ISO 9001 Certified Manufacturing: Highest standard for automotive component production
Quality Control & Verification
QC Item Verification Method
Housing casting integrity Visual and pressure decay test - no porosity, cracks, or voids
Coolant passage flow Flow bench measurement - meets Toyota cooling system specification
Oil passage flow Flow bench measurement - meets Toyota lubrication system specification
Internal leak integrity Pressure test on both oil and coolant circuits - zero cross-leakage
Gasket sealing surface flatness Dial gauge measurement - flatness within 0.1 mm
Thread and port inspection Go/no-go gauge for coolant and oil line fittings
Full functional test (batch sampling) Random 2-5% of each batch tested on circulation loop at operating temperature
Installation & Maintenance Recommendations
⚠️ IMPORTANT: The 1HZ oil cooler is located on the side of the engine block and is connected to both the engine oil system and the coolant system. When replacing the oil cooler, the oil cooler gasket (Toyota OE: 15785-66010) and sealing rings must also be replaced - never reuse old seals. Coolant and engine oil should be drained before removal and replaced with fresh fluids after installation.
When to replace this oil cooler (1HZ-specific symptoms):
Symptom Diagnosis
Milky residue in coolant overflow bottle or radiator Oil has entered the coolant system - internal oil cooler failure
Oil on the dipstick appears milky or frothy Coolant has entered the oil system - internal oil cooler failure
Coolant loss without visible external leak Coolant entering the oil system through failed cooler internal seals
Engine overheating under load Reduced heat transfer efficiency - clogged or failed cooler
Erratic oil pressure readings Restricted oil flow through cooler passages
Installation Steps (High-Level - Refer to Toyota Workshop Manual for Complete Details):
  1. Drain the engine oil and coolant completely
  2. Remove the oil filter, oil lines, and coolant lines from the oil cooler assembly
  3. Remove the oil cooler mounting bolts and carefully withdraw the assembly from the engine block
  4. Thoroughly clean the mounting surface on the engine block
  5. Compare the new oil cooler with the old unit - verify port locations and dimensions
  6. Install new sealing rings and the oil cooler gasket (Toyota OE: 15785-66010)
  7. Install the new oil cooler assembly onto the engine block and torque mounting bolts to specification
  8. Reconnect the oil lines and coolant lines - use new sealing washers where specified
  9. Refill the engine with fresh engine oil and coolant to correct levels
  10. Start the engine and check for leaks at all connections
  11. Run the engine to operating temperature and verify oil pressure and coolant temperature
  12. Check for any milky residue in the coolant or oil
Maintenance schedule for 1HZ oil cooler systems:
Service Item Interval
Inspect oil cooler for external leaks or corrosion At every oil change (every 5,000-10,000 km)
Replace engine coolant Every 2 years or 40,000 km
Check coolant and oil for cross-contamination Monthly - early detection prevents catastrophic engine damage
When oil cooler is removed for any reason Always replace oil cooler gasket and sealing rings
Packaging & Supply
  • Individual packaging: Sealed in anti-static VCI bag, foam-lined carton
  • Carton dimensions: Approximately 28 × 20 × 15 cm
  • Net weight: Approximately 2.5-3.0 kg
  • Master carton: 20 units per export carton (palletisable)
  • Lead time: 3-7 working days for stock orders; 15-25 days for production orders above 100 pieces
  • Minimum order quantity: 1 piece (sample order available)
  • Shipping methods: FedEx, UPS, DHL for sample quantities; sea freight from major Chinese ports
  • H/S Code: 8409.91
For workshops performing a full cooling system service, the supplier also stocks matching oil cooler gaskets (15785-66010), sealing rings, and relief valves (15690-64011) for the 1HZ engine family.
Tags: 

Toyota RAV4 headlamp assembly,  

Toyota Starlet cylinder head with warranty,  

Lexus GS350 replacement motor

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Products
PRODUCTS DETAILS
Products

Isuzu Cars Parts

Isuzu Engine Parts

Isuzu Chassis Parts

ISUZU Truck Parts

VW Car Parts

AUDI Car Parts

QINGLING ISUZU Parts

NISSAN Spare Parts

MITSUBISHI Auto Parts

FUSO Truck Parts

TOYOTA Auto Parts

HINO Truck Parts

HONDA Auto Parts

MAZDA Spare Parts

JAC Spare Parts

JMC Spare Parts

FORD Auto Parts

HYUNDAI Auto Parts

KIA Auto Parts

Other Auto Parts
Corrosion-resistant aluminium alloy oil cooler assembly with plate-type heat exchanger for Toyota 1HZ 4.2L diesel engine OEM specification
  • name
  • name
  • name
Corrosion-resistant aluminium alloy oil cooler assembly with plate-type heat exchanger for Toyota 1HZ 4.2L diesel engine OEM specification
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 Land Cruiser 70/80 Coaster 1HZ
Construction:
Plate-type Heat Exchanger With Multiple Cooling Plates
Housing Material:
Corrosion-resistant Aluminium Alloy
Cooling Type:
Liquid-to-liquid (oil-to-coolant)
Weight:
Approximately 2.5–3.0 Kg
Engine Compatibility:
Toyota 1HZ (4.2L Inline-six Diesel), 1HD Series
Bore:
94.0 Mm
Stroke:
100.0 Mm
Carton Dimensions:
28 × 20 × 15 Cm
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

Corrosion-resistant aluminium alloy oil cooler

,

Toyota 1HZ diesel engine oil cooler

,

Plate-type heat exchanger oil cooler

Product Description
Oil Cooler Assembly 15710-17010 For Toyota Land Cruiser 70/80 Coaster 1HZ 4.2L Diesel
The oil cooler assembly carrying Toyota OEM number 15710-17010 is a direct factory-spec replacement for the engine oil cooler on the Toyota 1HZ 4.2L inline-six diesel engine. This component is fitted to a wide range of Toyota's most durable commercial and off-road vehicles, including the Land Cruiser 70 Series, Land Cruiser 80 Series, and Coaster bus.
Toyota 1HZ 4.2L Diesel Engine Oil Cooler Assembly 15710-17010
Product Specifications
Part Number: 15710-17010
Product Name: Oil Cooler Assembly
Car Model: Toyota Land Cruiser 70/80 Coaster
Engine Model: Toyota 1HZ
Condition: 100% Brand New
Origin: China Mainland
Material: High-strength aluminum alloy & precision bearings
Cooling Type: Engine coolant circulation
Installation: Direct OEM replacement
Quality Standard: OEM equivalent / ISO quality control
Vehicle & Engine Applications
This Toyota 1HZ oil cooler assembly 15710-17010 directly replaces the factory component in the following configurations:
Vehicle Model Chassis Engine Production Period
Toyota Land Cruiser 70 Series HZJ70, HZJ71, HZJ73, HZJ77 1HZ 4.2L diesel 05.1993 - 08.1999
Toyota Land Cruiser 70 Series HZJ73HV 1HZ 4.2L diesel 11.1990 - 05.1993
Toyota Land Cruiser 80 Series HZJ80, HDJ80 1HZ / 1HD-T 4.2L diesel 01.1990 - 01.1995
Toyota Coaster Bus HZB40, HZB50 1HZ 4.2L diesel 07.1999 - 03.2001
Additional applications confirmed by Toyota EPC data:
  • Land Cruiser HZJ81V
  • Coaster HZB60, HZB70
  • Coaster HZB41, HZB40
Important fitment note: This oil cooler is also compatible with the 1HD-T and 1HD-FT turbo diesel engines, which share the same oil cooler architecture as the 1HZ. However, always verify fitment by matching your original part number or consulting the Toyota EPC for your specific chassis code and production date.
Why the 1HZ Oil Cooler Fails
The Toyota 1HZ engine is legendary for its durability. The oil cooler, however, is a serviceable component that can fail over time - particularly on high-mileage vehicles exceeding 300,000 km.
Common failure modes include:
  1. Internal gasket failure: The sealing rings between the oil cooler and the engine block degrade over time, allowing oil to leak into the coolant system or coolant to enter the oil system.
  2. Clogged coolant passages: Scale, corrosion, and debris accumulation inside the oil cooler's coolant passages reduces heat transfer efficiency.
  3. External corrosion: The aluminium housing can corrode externally, particularly in vehicles exposed to road salt or coastal environments.
  4. Relief valve failure: The oil cooler relief valve can stick or fail, allowing oil to bypass the cooler entirely.
Features & Benefits
  • Plate-Type Heat Exchanger Design: Efficient oil cooling with large surface area for heat transfer in a compact package
  • Prevents Oil-Coolant Cross-Contamination: Restores critical separation between oil and coolant systems
  • Corrosion-Resistant Aluminium Alloy Housing: Provides resistance to coolant additives and thermal cycling
  • Direct OE Replacement: No modifications, adapters, or additional fabrication required
  • Comprehensive OE Interchange Coverage: Interchangeable with 15710-17020, 15710-17011, and 15710-17021
  • Proven on Legendary 1HZ Engine Platform: Critical component for achieving engine longevity of 500,000+ km
  • IATF 16949 / ISO 9001 Certified Manufacturing: Highest standard for automotive component production
Quality Control & Verification
QC Item Verification Method
Housing casting integrity Visual and pressure decay test - no porosity, cracks, or voids
Coolant passage flow Flow bench measurement - meets Toyota cooling system specification
Oil passage flow Flow bench measurement - meets Toyota lubrication system specification
Internal leak integrity Pressure test on both oil and coolant circuits - zero cross-leakage
Gasket sealing surface flatness Dial gauge measurement - flatness within 0.1 mm
Thread and port inspection Go/no-go gauge for coolant and oil line fittings
Full functional test (batch sampling) Random 2-5% of each batch tested on circulation loop at operating temperature
Installation & Maintenance Recommendations
⚠️ IMPORTANT: The 1HZ oil cooler is located on the side of the engine block and is connected to both the engine oil system and the coolant system. When replacing the oil cooler, the oil cooler gasket (Toyota OE: 15785-66010) and sealing rings must also be replaced - never reuse old seals. Coolant and engine oil should be drained before removal and replaced with fresh fluids after installation.
When to replace this oil cooler (1HZ-specific symptoms):
Symptom Diagnosis
Milky residue in coolant overflow bottle or radiator Oil has entered the coolant system - internal oil cooler failure
Oil on the dipstick appears milky or frothy Coolant has entered the oil system - internal oil cooler failure
Coolant loss without visible external leak Coolant entering the oil system through failed cooler internal seals
Engine overheating under load Reduced heat transfer efficiency - clogged or failed cooler
Erratic oil pressure readings Restricted oil flow through cooler passages
Installation Steps (High-Level - Refer to Toyota Workshop Manual for Complete Details):
  1. Drain the engine oil and coolant completely
  2. Remove the oil filter, oil lines, and coolant lines from the oil cooler assembly
  3. Remove the oil cooler mounting bolts and carefully withdraw the assembly from the engine block
  4. Thoroughly clean the mounting surface on the engine block
  5. Compare the new oil cooler with the old unit - verify port locations and dimensions
  6. Install new sealing rings and the oil cooler gasket (Toyota OE: 15785-66010)
  7. Install the new oil cooler assembly onto the engine block and torque mounting bolts to specification
  8. Reconnect the oil lines and coolant lines - use new sealing washers where specified
  9. Refill the engine with fresh engine oil and coolant to correct levels
  10. Start the engine and check for leaks at all connections
  11. Run the engine to operating temperature and verify oil pressure and coolant temperature
  12. Check for any milky residue in the coolant or oil
Maintenance schedule for 1HZ oil cooler systems:
Service Item Interval
Inspect oil cooler for external leaks or corrosion At every oil change (every 5,000-10,000 km)
Replace engine coolant Every 2 years or 40,000 km
Check coolant and oil for cross-contamination Monthly - early detection prevents catastrophic engine damage
When oil cooler is removed for any reason Always replace oil cooler gasket and sealing rings
Packaging & Supply
  • Individual packaging: Sealed in anti-static VCI bag, foam-lined carton
  • Carton dimensions: Approximately 28 × 20 × 15 cm
  • Net weight: Approximately 2.5-3.0 kg
  • Master carton: 20 units per export carton (palletisable)
  • Lead time: 3-7 working days for stock orders; 15-25 days for production orders above 100 pieces
  • Minimum order quantity: 1 piece (sample order available)
  • Shipping methods: FedEx, UPS, DHL for sample quantities; sea freight from major Chinese ports
  • H/S Code: 8409.91
For workshops performing a full cooling system service, the supplier also stocks matching oil cooler gaskets (15785-66010), sealing rings, and relief valves (15690-64011) for the 1HZ engine family.
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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