Installation of L28/32 diesel engine parts

① Cylinder gasket

When assembling, the side with the rolled edge should face the cylinder head. If installed in reverse, it will cause early air leakage and burn out the cylinder gasket, affecting its service life.

② Piston

The horseshoe-shaped groove at the top or the peach-shaped tip side at the top should face upwards. If installed in reverse, it is not conducive to the mixing of fuel and air. The unburned fuel cannot generate secondary vortex movement and thus burns incompletely, resulting in the diesel engine failing to start or working abnormally after starting.

③ Assembly of the connecting rod and piston

The oil hole at the small end of the connecting rod and the horseshoe-shaped groove at the top of the piston or the peach-shaped tip at the top should face upwards on the same side. Otherwise, it will cause the small end bushing of the connecting rod and the piston pin to be unable to lubricate, resulting in dry friction.

④ The upper and lower tiles of the connecting rod bearing

If it is a newly replaced bearing bush, there is no distinction between top and bottom. If the bearing bush has been used, it should be reinstalled in its original position and should not be swapped up and down; otherwise, it will affect the fit between the journal and the bearing bush.

⑤ The combination of the connecting rod cover and the connecting rod

Both the large end of the connecting rod and the back of the connecting rod cover have assembly marks. When assembling, the marked parts should be on the same side. Otherwise, the original processing accuracy of the large end hole diameter of the connecting rod cannot be guaranteed, and the correct fit between the bearing and the shaft will also be disrupted.

⑥ Fuel injector pressure plate

One side of the pressure plate is flat and the other side is an arc surface. When installing, the arc surface should face the fuel injector body to ensure that the fuel injector is centered and not skewed when compressed. Otherwise, it is easy for the installation seat hole to leak air outward.