internal combustion engine stuck valves

[Luis_Villacres]

We own natural gas engines (Waukesha), sometimes the exhaust/intake valves were stuck in the valve guides, Do you guys know the causes and solutions to solve that issue?

 

[TugboatEng]

Are you using OEM or aftermarket parts?

 

[LittleInch]

Some sort of contaminant in the gas?

what does Waukesha say?

 

[gruntguru]

Assuming factory parts and clearances, the sticking will most likely be the result of contamination buildup. Because you have a problem with both intake and exhaust valves I would look at your lubricating oil. Does it have adequate solvency to remove varnish-like contamination?