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How one do valve adjust on diesel generator?

Valve adjustment should be done manufacturer recommended duration

How one does valve adjustment of a generator?


Remove he rocker lever covers.

Locate the Top Dead Center for cylinder number 1
Use ½ inch drive and engine bearing tool to rotate the engine clockwise when facing the damper until cylinder number 4 for four cylinder engine or until cylinder 6 for six cylinder engine intake rocker arm starts to open the intake valve


[Wiggle the rocker arm while barring the engine.


When the rocker arm gets tight, stop barring]




Adjust Valve of Diesel generator:


The clearance is correct when some resistance is felt when the feeler gauge is slipped between the valve stem and the rocker lever.






Intake Clearance: 0.254 mm= 0.010 inch

            Exhaust Clearance: 0.508 mm=0.20 inch

How one 4-cylinder Engine Valve adjusts?



Four cylinder Engine Valve Adjust:


One must sure firstly engine at TOP Dead Center for cylinder number 1.

Set only valves indicated by the arrows (E= exhaust, I = Intake ) Do not set valve which are not indicated.

Holding the knockout steady with the wrench, adjust the valve clearance with the screwdriver or allen wrench.  Tighten the lockout and measure the valve lash again.

Torque Value: 24 N-m = 18 ft-lb
Mark the vibration damper and rotate the crankshaft 360 degrees.

Adjust the as indicated illustration.

Torque Value: 24 N-m = 18 ft-lb





Six cylinder engine Valve Adjustment:


Make sure the engine at Top Dead Center for cylinder Number 1.

Set only valves indicated by the arrows (E= exhaust, I = Intake ) Do not set valve which are not indicated.

Holding the knockout steady with the wrench, adjust the valve clearance with the screwdriver or allen wrench.  Tighten the lockout and measure the valve lash again.




Torque Value: 24 N-m = 18 ft-lb

Mark the vibration damper and rotate the crankshaft 360 degrees.

Adjust the as indicated illustration.

Torque Value: 24 N-m = 18 ft-lb


Finishing step of Valve Adjustment:

Check the rocker lever covers for cracks.
Install the rocker lever covers.
Tighten the capscrews and also must check the
Torque Value: 24 N-m = 18 ft-lb


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