Engine Piston 13101-54120 For TOYOTA 5L 5L-E Hilux Dyna Hiace Fortuner 3.0D — Verified OEM Direct Fit, 99.5mm STD Alfin Oil-Gallery Tinned Diesel Piston Set

The Engine Piston Sub Assembly (with Pin), OEM number 13101-54120, is a verified direct-fit replacement for TOYOTA 5L and 5L-E (3.0L) diesel engines. This piston is a critical reciprocating component responsible for converting combustion pressure into crankshaft rotation and managing thermal load within the cylinder.

The 5L is a 2,985 cc water-cooled inline-4 OHV 8-valve diesel engine with a 99.5 mm bore and 96.0 mm stroke, widely used in TOYOTA Hilux, Hiace, Dyna, Toyoace, and Fortuner models from 1994 through 2021+.

This piston features an Alfin insert at the ring-land area for ring-groove reinforcement, an internal oil gallery for crown cooling, and tin coating (tinned alfin) for improved break-in characteristics and scuff resistance. The 4-cylinder set is supplied in standard (STD) 99.50 mm size, with oversize options available for worn cylinder bores.

All dimensions are verified against Toyota Parts Catalogs and aftermarket technical specifications for the 5L platform.

This piston replaces the following OEM and aftermarket part numbers:

• OEM: 13101-54120, 13101-54120-01 (MARK 1), 13101-54120-02 (MARK 2), 13101-54120-03 (MARK 3), 13103-54120 (+0.50), 13103-54170, 13101-54170
• TEIKIN: 46273A STD, 46273A-050
• TIK: 1T99510H-STD, 1T99510H-050
• IZUMI: ALFIN+GALLERY
• SM Germany: 130096003100, 7197590000

• Loss of engine compression: Worn or stuck piston rings reduce cranking pressure, causing hard starting and noticeable power loss under load.
• Excessive exhaust smoke (blue/white/black): Indicates oil passing rings or incomplete combustion — piston and ring replacement often resolves it.
• Increased oil consumption: Glazed bores or tired ring packs allow oil to enter the combustion chamber, raising operating costs.
• Piston scoring or scuffing: Visible skirt wear or liner wall scoring caused by thermal expansion, insufficient lubrication, or overheating — requires immediate replacement to prevent catastrophic engine failure.
• Knocking or tapping noise: Piston slap or bearing wear requires inspection before further engine operation.

Confirmed Fitment Sources: Toyota Parts Catalogs (Partsouq) confirm 13101-54120-01/-02/-03 fitment for Hiace Van Commuter LH162R (2000–2004), Dyna LY235L (2001–2021), Hiace LH212L (2005–2026), and Hilux LAN15/25/35 (2011–2015). Bossgoo confirms fitment for Hilux, Hiace, Land Cruiser Prado 3.0 LTR Diesel. Autoparts007 confirms fitment for Toyota 5L engine applications.

• OEM Number Distinction: 13101-54120 is the OEM number for the piston sub-assembly (piston with pin and circlips). 13011-54130 is the OEM number for the piston ring set (STD); 13013-54130 is the ring set for +0.50 oversize. Both are required for a complete engine rebuild and must be ordered separately.
• The MARK 1/2/3 designation (-01/-02/-03) indicates matched piston grade for cylinder bore tolerance. During engine rebuild, all four pistons should use the same MARK grade for consistent clearance and performance.
• Verify piston-to-bore clearance and valve-to-piston clearance against the TOYOTA 5L workshop manual before installation.
• This piston is supplied in standard (STD) 99.50 mm size. Oversize options (+0.50 mm, 100.00 mm) are available — specify at inquiry.
• Piston rings are NOT included — order piston ring set (13011-54130 STD or 13013-54130 +0.50) separately.
• Always verify OEM number against the engine tag or vehicle documentation before ordering.

Manufacturing conforms to ISO/TS16949 and ISO9001 quality management system standards. Each piston undergoes 100% quality inspection before packaging. Production adheres to GB1148-82, JB3931-85, and JB3932-85 piston standards.

1. Verify fitment: Confirm piston diameter (99.50 mm), compression height (42.30 mm), and ring groove dimensions (2.0H/1.5/4.0 mm) against removed OEM piston. Verify MARK grade (-01/-02/-03) matches original.
2. Check piston-to-bore clearance: Measure cylinder bore and piston skirt diameter; compare against manual specification. If cylinder bore wear exceeds OEM limits, select appropriate oversize piston (+0.50 mm) and bore/hone accordingly.
3. Ring installation: Install rings with correct orientation (top ring marking up); use a ring expander to avoid breaking rings. Stagger ring end gaps at 120° intervals.
4. Check ring end gap: Insert each ring into its cylinder and measure end gap with a feeler gauge. Compare against manual specification.
5. Pin & clip installation: Lubricate pin bore and install piston pin (29 × 74 mm); secure with new circlips (included).
6. Connecting rod torque: Follow manual sequence — always confirm against the specific engine variant manual.
7. Lubricate: Coat rings and cylinder walls with clean engine oil before piston installation. Use a ring compressor for piston insertion.
8. Check liner protrusion: Verify liner protrusion meets specification before final assembly.

• 5L engine oil capacity: approximately 5.5–6.0 L including filter. Replace engine oil every 5,000–10,000 km or 12 months, whichever comes first.
• Oil type: Toyota-approved 10W-30 or 15W-40 API CF/CD.
• Inspect compression and oil consumption at every 50,000 km or annually.
• Replace piston rings and inspect pistons during any top-end overhaul.
• Monitor timing belt and tensioner condition — replace according to TOYOTA service interval (typically every 100,000 km or 5 years).

• Standard packing: Neutral packaging / corrugated carton; 4 pcs (one set) per box; wooden pallet available for bulk orders.
• Set options: Standard size (STD 99.50 mm), +0.50 mm (100.00 mm) — specify at inquiry.
• Suitable for: Engine rebuild workshops, fleet maintenance departments, spare parts distributors, and export wholesalers.
• Related parts available: Piston ring set (13011-54130 STD / 13013-54130 +0.50), piston pin (29 × 74 mm), circlips (90521-31001), cylinder liner kit (99.5 mm), and full 5L overhaul kit.