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From: bcking@inmet.UUCP
Newsgroups: net.auto.tech
Subject: Re: Spark Plug Deposits
Message-ID: <102000012@inmet.UUCP>
Date: Tue, 26-Nov-85 21:42:00 EST
Article-I.D.: inmet.102000012
Posted: Tue Nov 26 21:42:00 1985
Date-Received: Fri, 29-Nov-85 11:43:18 EST
References: <633@bonnie.UUCP>
Lines: 31
Nf-ID: #R:bonnie:-63300:inmet:102000012:000:1175
Nf-From: inmet!bcking    Nov 26 21:42:00 1985


*** reface this slime with your message ***

It sounds like ash deposits formed by burning oil additives.  If the car
has been burning oil recently, you may want to do one or more of the
following:

- Stop using an oil additive, if you're currently using one.

- Try a different brand of oil; one with less additives in it.

If the car's burning oil it's probably getting to the combustion
chamber via worn valve guides (this is a chronic problem with small block
Chevys).  A valve guide job is in order if you're real fanatical, but
since small blocks don't die (they just fade away) you may want to
wait the 50k miles or so until the engine really needs it...

Probably the best thing to do is just put in new plugs and see if it
happens again.

About the compression check- don't worry too much about that either.
Compression readings can fluctuate wildly with changes in ambient
temperature and humidity.  As long as they're all within 10% of one
another things should be O.K.  If you're still concerned you might
want to take the car to a good tuneup shop for a leakdown test.

R.M. Mottola
Cyborg Corp.
Newton, MA.

(Reply posted for me by a friend, but not for long)