what could cause the valve seats to burn out the mechanic said that its running hotter or something... what could cause this


cheers

running far too lean.

or running really low octane petrol, like russian/eastern std 76octane.

really munchies valve seats, cylinder heads and piston rings. don't ask

Puntoruletheroad said:

what could cause the valve seats to burn out the mechanic said that its running hotter or something... what could cause this
cheers

Click to expand...

This happened to me once years ago before engine management systems. Cause was lots of high revs and high speed runs with a weak mixture caused by me altering the airfilter to a more free flowing foam type.

Has the head been skimmed and the valve clearences not adjusted to compensate?

Is it possible for this engine, with its management system, to run weak and hot due to your induction changes?

The only other recent case of valve burn I know of concerned a bloke who constantly ran it against the limiter as though it were a computer game.
Hope you get it sorted
Regards

yep sounds like underfueling