Diesel Engine Piston Me016895 FUSO Truck Parts For 4D33 Series

Genuine specification piston ME016895 for 4D33 diesel engine. Direct replacement for compatible truck applications. Sold as a single unit. Verify engine serial number and bore size before ordering. Does not include piston rings, wrist pin, or circlips. Professional installation required.

The ME016895 piston is a precision-engineered component designed specifically for the 4D33 series diesel engine found in various medium-duty trucks. This piston is manufactured using high-strength aluminum alloy with a controlled expansion coefficient, ensuring stable dimensional accuracy across the full operating temperature range of the engine.

The piston features a monotherm single-piece construction, which provides excellent thermal transfer from the piston crown to the cylinder wall. This design reduces hot spots and minimizes the risk of ring sticking or piston scoring under sustained load conditions. The combustion bowl profile is machined to OE specifications to support the standard injection timing and fuel atomization characteristics of the 4D33 fuel system.

The ring belt area is reinforced with three precisely cut grooves: two upper grooves for compression rings and one lower groove for the oil control ring. Land areas between grooves are optimized to reduce carbon accumulation and maintain ring mobility over extended service intervals.

The skirt profile incorporates a gradual ovality taper that compensates for thermal expansion, reducing cold start noise while maintaining stable guidance once operating temperature is reached.

The piston pin bore is machined for a full-floating wrist pin configuration. Honed bearing surfaces within the pin boss allow the pin to rotate freely, distributing contact wear evenly. The pin bore diameter of 30.0 mm accommodates the standard heavy-duty wrist pin used across the 4D33 engine family.

Each ME016895 piston is dimensionally inspected for proper compression height, overall length, and ring groove parallelism. No balancing modification is required when installed as part of a full set of four pistons, provided the crankshaft and connecting rods remain within factory weight specifications.

This piston is suitable for engine rebuilds involving worn piston rings, scored skirts, or cracked ring lands. Always inspect the cylinder liner or parent bore surface for scratches, out-of-round condition, or taper before final assembly.

Compatibility notes for ME016895 piston: This piston replaces original factory units used in naturally aspirated 4D33 configurations. For turbocharged variants operating above 0.8 bar boost pressure, verify original piston crown thickness and ring groove depth before substitution. The piston pin is not included but can be ordered separately as part number ME016896. Piston rings must be ordered as a separate set. Ring gap shall be checked against cylinder bore diameter before final assembly. Lubricate pin and ring grooves during installation. Torque connecting rod bolts to factory specifications. Do not heat piston beyond 80°C when assembling pin. Use new piston rings for each rebuild. Clean ring grooves completely before fitting new rings. Measure piston skirt clearance at 90-degree angle relative to pin axis.