Mitsubishi 4M42 Cylinder head assembled (non common rail) 908517 171225
171225The Mitsubishi 4M42 assembled cylinder head (Non-Common Rail, ref. 908517) 171225 fits straight onto the 4M42 diesel platform and works well for engines that start showing rough idle, overheating marks, or loss of compression. The assembly comes ready for installation, so workshops save time during rebuilds. It suits fleets, repair shops, and anyone handling a top-end repair on the 4M42. The casting sits correctly, the ports line up cleanly, and the head supports smooth engine running once fitted with the rest of your components.
The assembled cylinder head fits the Mitsubishi 4M42 Non-Common Rail engine 908517 171225, a setup widely used in work vans and light commercial vehicles. Most mechanics choose a full assembly when the old head shows cracks around the valves or when the engine starts losing power after long hours on the road. This replacement sits well on the block, and the chamber layout matches the 4M42 pattern, so nothing feels out of place during installation.
You don’t have to spend extra time preparing the head. It comes in a clean state, and the surfaces sit flat, which helps during gasket sealing. Another thing worth noting is how neatly the ports line up with the intake and exhaust manifolds. Anyone who has worked on a 4M42 knows the difference that tiny alignment details make when putting everything back together.
Why workshops pick this assembly
- Fits the Mitsubishi 4M42 Non-Common Rail engine layout
- Supports proper combustion and stable running once installed
- Helps solve common issues like overheating marks, warped faces, and compression loss
- Cuts down rebuild time because major components arrive pre-fitted
- Works well for routine overhauls, fleet maintenance, and engine restorations
In most cases, technicians choose this assembly when they want the engine to run smoothly again without repeating the same repair twice. The casting holds its form well, and the head sits correctly when torqued down, making the job straightforward for any workshop.
Acme Impex checks each cylinder head before dispatch, looking for clean cast areas and proper machining so the installer doesn’t run into unexpected surprises. If you’re repairing or rebuilding a 4M42, this assembled cylinder head helps get the engine back to steady operation and keeps the vehicle working as it should.