Engine Piston ME014160 For MITSUBISHI 4D34-T Fuso Canter FE639 FG639 3.9L — OEM Verified Direct Fit, 104mm STD Alfin + Oil Gallery Diesel Piston

The Engine Piston with OEM numbers ME014160 / ME013325 / ME088990 is a verified direct-fit replacement for MITSUBISHI 4D34-T (3.9L turbo 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 4D34-T is a 3,908 cc water-cooled inline-4 diesel engine with a 104.0 mm bore and 115.0 mm stroke, widely used in MITSUBISHI Fuso Canter FE639 and FG639 medium-duty trucks from the mid-1990s through the 2000s.

• Dimensional Verification: Piston diameter 104.00 mm (STD), total height 112.20 mm, compression height 62.20 mm, pin diameter 36.00 mm, pin length 88.00 mm, combustion chamber 53.5–54.5 mm — verified against multiple supplier technical sheets and aftermarket piston catalog data for the 4D34-T platform.
• Ring Groove Geometry: Ring grooves sized 2.8 mm (top, Half Keystone/K) / 2.0 mm (second) / 4.0 mm (oil control) — matched to OEM 4D34-T piston ring specifications.
• Material & Construction: Manufactured from high-grade aluminum alloy with Alfin insert at the ring-land area and tin coating on the skirt for improved break-in and scuff resistance — confirmed by IZUMI and multiple aftermarket supplier specifications.
• Weight Verified: 1,710 g per piston (bare piston reference weight) — consistent with aftermarket technical data for the 4D34-T platform.
• OEM Cross-Reference Verified: Replaces ME014160, ME013325, ME088990, ME103325, ME014161, ME014162 — confirmed across multiple independent parts catalogs. International brand cross-references include TEIKIN 43605A, IZUMI 4D34T.
• Multi-Platform Application: Confirmed compatible with MITSUBISHI Fuso Canter FE639 and FG639 trucks equipped with 4D34-T / 4D34-2AT turbo diesel engines, typically in 2004 model-year applications (and covering the broader 1995–2000s Fuso medium-duty range).

• Loss of engine compression: Worn or stuck piston rings reduce cranking pressure, causing hard starting and noticeable power loss under turbo boost — a common complaint on high-mileage 4D34-T engines.
• 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 on fleet vehicles.
• Piston scoring or scuffing: Visible skirt wear or liner wall scoring caused by thermal stress, insufficient lubrication, or turbo-related heat load — requires immediate replacement to prevent catastrophic failure.
• Knocking or tapping noise: Piston slap or pin/bore wear requires inspection before further engine operation.

Each piston undergoes 100% quality inspection before packaging. Manufacturing conforms to ISO9001 quality management system standards.

1. Verify Oil Gallery configuration: Before installation, compare the new piston with the removed original to confirm whether an internal oil cooling gallery is present. Do not interchange standard (non-gallery) and oil-gallery pistons without confirming engine oiling requirements.
2. Verify dimensions: Confirm piston diameter (104.00 mm), compression height (62.20 mm), and ring groove sizes (2.8K/2.0/4.0 mm) against the original piston.
3. Check piston-to-bore clearance: Measure the cylinder liner bore and piston skirt diameter; compare against the workshop manual specification.
4. Ring installation: Install rings with the top ring marking facing upward; stagger ring end gaps at 120° intervals.
5. Pin & clip installation: Lubricate the pin bore and install the piston pin (36 × 88 mm); secure with new circlips.
6. Connecting rod torque: Follow the manual's torque sequence and specification — always confirm against the specific 4D34-T variant manual.
7. Liner protrusion: Verify liner protrusion meets specification before final assembly.

• 4D34-T engine oil capacity: Approximately 10–12 L including filter (confirm exact capacity for your specific Fuso model). Replace engine oil every 10,000–15,000 km or per fleet interval.
• Oil type: MITSUBISHI-approved 15W-40 API CF-4/CH-4 (or higher) for turbocharged diesel.
• Inspect compression and oil consumption at every 50,000 km or annually.
• Monitor turbocharger boost and EGT — excessive heat degrades piston crown integrity over time.
• Replace piston rings and inspect pistons during any top-end overhaul.

• Standard packing: Neutral packaging / corrugated carton; 4 pcs (one engine set) per box; wooden pallet available for bulk orders.
• Set options: Standard (STD 104.00 mm) or oversize (+0.50 mm, +1.00 mm) — specify at inquiry. Oil Gallery configuration must be explicitly stated when ordering.
• Minimum order: 4 pcs (one engine set) per order; bulk quantity discounts available.
• Suitable for: Engine rebuild workshops, Fuso fleet maintenance departments, spare parts distributors, and export wholesalers.
• Related parts available: Piston ring set (2.8K+2.0+4.0 mm), piston pin (36 × 88 mm), circlips, cylinder liner kit (104 mm), and full 4D34-T overhaul kit.