Charles,
A burnt valve acts like a miss. It warps and causes the loss of the seal
when the valve is closed. This in turn doesnt allow the cylinder to create
pressure, and airgo stops combustion in a diesel engine. If it burns the
intake valve, then it can sound like a backfire through the intake.
"Charles Kerekes" <charleskerekes@yahoo.com> wrote in message
news:1134071005.976037.303050@z14g2000cwz.googlegroups.com...
> James,
>
> I have the 7.3L engine approaching 100K, so I'd be interested to see
> responses to this as well.
>
> My auto mechanical skills stop at the real basics, so could you tell me
> what a "burnt valve" is and how I would know if my truck had it?
> Thanks.
>
> Charlie
> http://ChanginGears.com
>
