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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!wupost!uwm.edu!news.mr.med.ge.com!bonfire!hinz
- From: hinz@bonfire (David Hinz Mfg 4-6987)
- Subject: Re: Carbon Buildup in engines ( valves ? ).....
- Message-ID: <1992Jul22.073213.4161@mr.med.ge.com>
- Sender: news@mr.med.ge.com
- Nntp-Posting-Host: bonfire
- Organization: GE Medical Systems, Magnetic Resonance
- X-Newsreader: Tin 1.1 PL4
- References: <4768@calmasd.Prime.COM>
- Distribution: na
- Date: Wed, 22 Jul 92 07:32:13 GMT
- Lines: 50
-
- jxt@calmasd.Prime.COM (Jawahar Tembulkar) writes:
- : I am given to understand that cars can experience loss in power ( also
- : knocking, oinging, etc., ) due to "carbon buildup".
- :
- : A few fundamental questions:
- :
- : * How can one diagnose if in fact there is carbon buildup ?
- :
- Perform a compression test. If the compression is substantially above
- what your service manual says it should be, there's carbon in there.
-
- : * What causes carbon buildup
- : [ I have heard some people say that if the overwhelming majority of
- : trips in the car is of short distance, the engine does not get up
- : to the optimum working temperature long enough to burn the carbon
- : which is a residue of internal combustion. Is this correct ? ]
-
- Bingo!
-
- :
- : * Can it be prevented
- : [ Can regular long distance trips prevent carbon buildup ? ]
-
- Yes!
- :
- : * How can it be "fixed"
- : [ I have read on this newsgroup that taking apart at least part of
- : the engine, and subjecting the carbon deposit areas to "crushed
- : walnut shells" is the best way to remove the deposits. Is this
- : really the cae ? What would such a thing cost ?
- : Chevron, etc., sell a "Techron" based chemical which is supposed
- : to clean feul injectors, etc. Would this help burn carbon
- : deposits ? ]
-
- IMHO, the best way to clean the carbon off is to take a nice, long drive in
- the country, preferably along winding, scenic roads. After a few hundred
- miles, you should notice the improvement. I don't think injector cleaner
- would do anything for you; I don't know of anything to pour in the tank that
- will clean the carbon off. It's either burn it away through driving, or
- mechanically remove it.
-
- : Jawa
-
- --
-
- Dave Hinz - Opinions expressed are mine, not my employer's. Obviously.
- SAAB - you get what you pay for; you pay (and pay, and pay) for what you get.
- hinz@picard.med.ge.com
-
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-