This happened to me 3 times with different cars. Discussing with a
specialist, he told me that sometimes it is a carbon particle that is
responsible for interferring with the closure of the exhaust valve. The
hi-temp. of burned gases complete the job. The last time, I notice some oil
burning for few weeks prior to the breakage. The cause was a worn valve
guide and I easily imagine that in did not help!
J.G.Catford: 73 MGB-GT and 75 TR6
> So I get the head off using the Rope Trick and I'm cleaning the old
> gasket off of it last night and I notice this nifty chunk missing out
> of the exhaust valve in the #6 chamber. Doh! as Homer would say. My
> compression leak wasn't the head gasket after all and now I'm looking
> at a head job :-(.
>
> I was wondering, is this something that "just happens" like s**t
> happens, or could I have done something to bring this on? As
> background, I keep the valves well adjusted, I use high enough octane
> gas and I've never revved this engine over 4,500 rpm. Any comments?
>
> Thanks,
> Jim
> jims@autodesk.com
> '74 TR6 CF20076U
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