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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!cs.utexas.edu!asuvax!ennews!gtephx!rakoczynskij
- From: rakoczynskij@gtephx.UUCP (Jurek Rakoczynski)
- Subject: Re: Cleaning spark plugs??
- Message-ID: <1992Sep1.173412.8513@gtephx.UUCP>
- Organization: AG Communication Systems, Phoenix, Arizona
- References: <fagundes.715201152@pv1649.vincent.iastate.edu> <1992Aug31.044935.18129@news.Hawaii.Edu>
- Date: Tue, 1 Sep 1992 17:34:12 GMT
- Lines: 46
-
- In article <1992Aug31.044935.18129@news.Hawaii.Edu>, yosinaga@uhunix.uhcc.Hawaii.Edu (Naoko Yoshinaga) writes:
- > Why is anti-seize lubricant necessary on spark plugs? Someone, who
- > builds 60-70's Chevy engines said to never use it. Because the
- > anti-seize can be conductive and the anti-seize can also mess up the
- > gap of the plug. Therefore it will degrade the performance of the
- > spark plug.
- >
- > All I can say in return is that the manuals say to use it. I don't
- > know why, though. Could someone please give me explanations or
- > references on why it is necessary? I would really appreciate it! >
- > Thanks!
-
- Maybe I lost something in your post but:
- Anti-sieze must be used on the plug threads going into aluminum heads
- and may be used (in place of oil) in iron heads. There is a high
- probability that the plug threads will simply "rip the hell out of the
- surface of the aluminum threads" when you remove the plug in an
- aluminum head without a proper lube. It also makes it a lot easier to
- take the plugs out.
-
- As for being conductive, the stuff you usually buy off the shelf is
- non-conductive (relatively speaking). But at 8000+ volts. a few ohms
- really doesn't make a difference and the interferance fit of the
- threads will provide a very good ground contact to the head. If
- anything, being conductive is what you want, but it really doesn't
- matter.
-
- As for messing up the plug gap, *IF* you put too much on the portion
- of the plug threads that *MAY* extend too far into the combustion
- chamber, and this glob *DOES* make it into the chamber, you *MAY* have
- some deposits from the anti-sieze that *MAY* settle near the positive
- conductor (usually the center post) on the insulator that *MAY* leak
- some current to ground that *MIGHT* make a noticable differance in
- performance.
-
- I was trying to think of something on an engine that should not have
- something on the threads, such as thread lock (or equvalent), lube,
- anti-sieze, sealant, etc., but I can't think of any. Not that you
- coundn't do it without something, but you shoudn't.
-
-
- --
- Jurek Rakoczynski, AG Communication Systems, POB 52179, Phoenix, AZ. 85072
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