SOHC.co.uk Forums > CB750

Taking engine out burning oil

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Bryanj:
Depends who fitted the guides, if a car guy he will have given too much clearance for the valve stem

yozzer74:
It was a car guy who fitted them but if that was  the issue would  it not have smoked from the start . ??

MarkCR750:
Hi Yozzer, just a thought but is it worth putting a few more miles on it before stripping?, it won't harm anything other than getting a bit of carbon build up perhaps, and you could get lucky and find that it's the rings that need further bedding in, that said it does look like a valve stem/seal issue but giving it another 100 miles of varied revs wouldn't take long, (that's if it will keep running without fouling the plugs of course), I'm just thinking that Pete said his smoked a lot until it bedded in.

Tomb:
If its simply a valve guide, could you not use a compressor connected to the plug hole to hold the valve up, and do the job with the engine in with head on. Or the rope trick.

paul G:

--- Quote from: Tomb on March 03, 2017, 03:47:11 PM ---If its simply a valve guide, could you not use a compressor connected to the plug hole to hold the valve up, and do the job with the engine in with head on. Or the rope trick.

--- End quote ---

I have done the rope trick before, certainly worth it just to check if the stem seals are on correctly.

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