Mitsubishi 4D34T Cylinder Block – Fuso Forklift Diesel Engine Cast Iron OEM

Mitsubishi 4D34T Cylinder Block — Fuso Forklift/Diesel Engine, Cast Iron, HY Brand

This is the Mitsubishi 4D34T cylinder block — the main structural component and foundation of the entire engine. The 4D34T is a 3.9L 4-cylinder turbocharged diesel engine used in Mitsubishi Fuso trucks, forklifts, and industrial equipment. The cylinder block is the cast iron housing that contains the cylinder bores (where the pistons reciprocate), the crankshaft main bearing saddles (where the crankshaft rotates), the camshaft bore, the oil galleries that distribute pressurized oil to every bearing surface, and the water jacket passages that circulate coolant around the cylinders. The block casting also provides the mounting surfaces for the cylinder head (top deck), oil pan (bottom), timing cover (front), flywheel housing (rear), engine mounts (sides), and all external accessories. A cracked cylinder block — typically from freezing with insufficient coolant concentration, overheating causing thermal stress between the cylinder bores, or a thrown connecting rod — is usually an engine-terminal failure because block repair by welding or stitching is unreliable on a high-stress casting with oil and coolant passages running through every wall.

This HY brand block is manufactured in Henan, China from cast iron with as-original specifications. Engine code 3907. 1-year warranty. Applications: Mitsubishi Fuso trucks, forklifts, and PICKUP/MPV diesel platforms. Wooden carton packing. Supply capacity: 500 pieces per month. Diesel engine usage. CYLINDER BLOCK type — this is the bare block casting ready for machining or complete engine assembly. When installing a new cylinder block, all bearings, seals, gaskets, and wear components must be replaced — the block is the only component reused. Verify the cylinder bores are properly honed and the main bearing saddles are aligned and to specification before assembly. The cylinder head deck surface must be checked for flatness — a warped deck will cause head gasket failure within the first operating hours.

Compatible with Mitsubishi 4D34T turbo diesel engines in Fuso trucks, forklifts, and industrial equipment. Browse our cylinder block selection for other engine platforms. For engine specifications, visit Mitsubishi Fuso official website.

Technical Specifications

Compatible Models

1-year warranty. Wooden carton shipping. Confirm your engine application →