How to adjust the valve of Futian Cummins four-cylinder engine

1. When adjusting, loosen the lock nut and adjusting screw first, insert the feeler gauge with the same thickness as the specified valve clearance into the gap between the adjusted valve foot and the rocker arm, rotate the adjusting screw and pull the feeler gauge back and forth. When the feeler gauge has slight resistance, tighten the lock nut and check again. If the clearance changes, readjust it.

2. There are two main methods to adjust the valve clearance:

(1) Cylinder-by-cylinder adjustment method:

The cylinder-by-cylinder adjustment method only needs to rotate each cylinder to the top dead center of the compression stroke of the cylinder (when the intake valve and exhaust valve are completely closed) to adjust the valve clearance of the cylinder. This method needs to find the top dead center of the compression stroke of each cylinder and remember the power sequence of various types of engines (gasoline engine is the ignition sequence and diesel engine is the fuel injection sequence).

(2) Two adjustment methods:

The twice adjustment method is to adjust all valves on the engine twice. The method has simple operation and high efficiency. No matter how many cylinders there are, they can only be adjusted twice.