Ari, if there is carbon around the exposed thread end ... - Saab 9000 Bulletin Board - Saabnet.com
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Ari, if there is carbon around the exposed thread end ...
Posted by TKC (more from TKC) on Thu, 19 Apr 2001 15:06:03
In Reply to: Pull the spark plugs, Ari
[Profile/Gallery]
, Thu, 19 Apr 2001 13:56:49
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of the plugs, is it normal ?
The tip and ground look nice but I always have this carbon ring around the threaded end (not sure what's the correct technical term to describe it). Does this imply the cylinder head is most likely carbon coated too ?
If I shine a light into the cylinder, I can see some carbon build up on the top of a couple of the pistons. Is this considered normal for an engine with a few miles on it ?
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