Mitsubishi 4dQe 1990-2000 - Aluminum Complete Cylinder Head 4D34 for Volvo Mitsubishi 4D34 Engine Perkins Yanmar – OEM ME997711

Product Overview: This cylinder head assembly is manufactured for Mitsubishi 4D34 engines and supplied ready for installation as a direct replacement unit. Because the unit is delivered fully assembled, a failed original head caused by cracking, distortion or valve damage can be replaced directly with minimal downtime.

Key Features: CNC machining holds deck flatness, valve seat concentricity, valve stem protrusion and port geometry to original equipment limits. Valve guides and seats are pre-installed and honed, and combustion chamber volumes are matched cylinder to cylinder for balanced compression and a smooth idle. Intake and exhaust manifold flanges are machined flat for reliable gasket sealing and correct manifold alignment. Every unit is pressure and vacuum tested before packing to confirm casting integrity and coolant passage sealing.

Vehicle Compatibility: This part is listed for Mitsubishi, covering model families such as 4dQe. Documented fitment covers model years 1990-2000. For unlisted vehicles, cross-reference the engine code and casting number to confirm the correct assembly.

Specifications: Key specifications: engine code 4D34; material Cast Iron or Aluminium; size STD; condition New; warranty 12 Months. The part is intended for replacement and repair use and is not a performance upgrade unless expressly described as such.

OEM / Reference Numbers: Reference numbers for this part include ME997711, ME990196 and ME997799. Compare these references with the identification marks on the original component to confirm compatibility.

Applications: Typical applications include head gasket failure repairs, valve damage repairs, engine rebuilds and fleet maintenance on vehicles with cracked or distorted cylinder heads. It also suits preventative maintenance programmes where a failed unit is replaced before secondary damage occurs.

Benefits / Replacement Information: Installing a new head assembly restores lost compression, corrects coolant loss and combustion leakage caused by cracking or distortion, and returns the engine to reliable service. Delivered ready to fit, the assembly removes the extensive machining work normally needed to revive a failed head. The repair stays within original equipment specification, which is important for vehicles that remain in daily commercial service.

Installation or Fitment Notes: Before fitting, confirm the engine code and reference number and inspect the block deck for flatness and the head bolt threads for damage. Fit a new gasket and, where required, new torque-to-yield bolts, ensuring the bolt holes are clean and free of fluid. Follow the factory tightening sequence and stages, refill the cooling system with the correct coolant, and re-check for leaks after warm-up. A qualified technician should carry out fitment using the manufacturer's documented procedures and torque values.