Duggins, Patrick J wrote:
>
> Does anyone know what can cause blue smoke from the exhaust? I have a
> '71 TR-6 that grandpa left me with 37,000 original miles. I thought,
> at first, that it could be that I needed new valve covers but, I
> replaced them and the problem persisted. It seems like I have tried
> just about everything I can think of. Any help would be great.
>
> Thanks,
> Patrick,
Blue smoke upon start up only indicates worn valve guides. That's usually
accompanied by a sandy looking deposit on the plug ends.
Smoke during normal running is bad rings--oil control type. You can have
good compression and still be burning oil. If you pull the plugs
immediately after turning the engine off, smoke will come out of the plug
holes of the offending cylinder(s), if the condition is bad enough.
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