noise from intake

[d design]

I hear an irregular poping sound from intake of single cylinder diesel. Sounds like a bad intake valve seat. What do you think?

[Ambler]

Yes, could be, also exhaust valve. 1st thing to do is check your engines valve clearances. Follow the workshop manual or consult a mechanic. Warm the engine to op temp if hot clearances are quoted before carrying out. If the clearances are OK. The next step would be to remove the head and take it to a specialist workshop to get them to recondition it. Good idea to replace the valves if they are at all pitted (usually exhaust valves suffer from this first). Get the injector tested by an injection service while your at it and replace if the spray pattern doesn't conform to specs. You should be able to do all this without pulling the engine out. Good luck

[bobconnie]

Also ya might ck your injector timeing, that will cause this problem at times ! Just a thought

[Ambler]

Originally Posted by bobconnie

Also ya might ck your injector timeing, that will cause this problem at times ! Just a thought

Yes true. Rare as the pump needs loosening and rotating. Is the engine a gear timed or cog timing belt

[Ambler]

Originally Posted by bobconnie

Also ya might ck your injector timeing, that will cause this problem at times ! Just a thought

Yes true. Rare as the pump needs loosening and rotating. Then again I imagined a gear timed engine. Could be a timing belt issue.

[d design]

Yanmar yse8. Its gear timed so dont think thats the issue. It dosent seem to have any performance problems but maybe I might get a suprise if I did a valve job. Thanks for the replies