Greig
I pulled this from some website awhile back. It was some good tech
info. from one of the parts suppliers but I don't have a reference so
I'm not sure who to credit.
Anyhow it said:
Worn Valve Guides and Valve Stems
"...even moderate wear in the valve guides is sure to result in lots of
oil burning. The problem is most pronounced at start-up and during
deceleration."
So if you're getting the blue/grey cloud during startup I'd have some
one follow you in your car to see if it's also putting out a puff of
smoke during gearshifts (when there's deceleration). If there is smoke
in both cases then you probably need new valves and valve guides (might
as well do both when you do it). I saw the same symptoms when following
one of the members of our club on a recent outing and I pretty sure she
needs new valve guides too.
I had one of the first Honda CVCC engines in a 75 Civic that had the
same symptoms and they were notorious for having valve guides wear out
quickly. Lots on nice blue smoke to warm you up on cold mornings.
Replacing them is a function of how much embarrassment you can take,
since in most cases it doesn't case a noticeable loss of power although
it's more than likely going to be a detriment to the engine in the long
run if you don't have it fixed.
Bud
71TR6 CC57365
71TR6 CC65446
66TR4A CTC57806
Cameron Greig wrote:
>
> Hi All
>
> My 71 TR6 engine appears to be in good shape,excellent compressions,uses
> very little or no oil.However every time I start the car either cold or
> hot it produces a significant cloud of grey smoke.Once the car is running
> no more smoke.The car is fitted with a large bore straight through
> exhaust system and I am wondering is the exhaust gases left in the system
> when the engine is switched off are collecting and are then being blown
> out on when the engine is restarted.
>
> any comment from your own experiences?
>
> Cameron
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