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  1. Newsgroups: rec.autos.tech
  2. Path: sparky!uunet!psinntp!ctp!sreit
  3. From: sreit@ctp.com (Stefan Reitshamer)
  4. Subject: Re: Water Vapor
  5. Message-ID: <1992Dec24.185733.29198@ctp.com>
  6. Sender: news@ctp.com
  7. Nntp-Posting-Host: punch.ctp.com
  8. Organization: Cambridge Technology Partners
  9. References: <79550005@teecs.UUCP> <VBREAULT.92Dec23103727@rinhp750.gmr.com>
  10. Distribution: ctp
  11. Date: Thu, 24 Dec 1992 18:57:33 GMT
  12. Lines: 27
  13.  
  14. In article <VBREAULT.92Dec23103727@rinhp750.gmr.com>, vbreault@rinhp750.gmr.com (Val Breault) writes:
  15. |> In article <79550005@teecs.UUCP> to@teecs.UUCP (Norman To) writes:
  16. |> 
  17. |>    White smoke comes out of the tail pipe evey time I start up
  18. |>    my car in a cold morning.  I've been hearing this is the
  19. |>    vapor of water which condense at the engine over night.
  20. |>    Are there any explanation for this?
  21. |> 
  22. |> Water vapor is a normal byproduct of combustion.  When the air 
  23. |> is cool enough, you can watch it condense as it comes out of
  24. |> the tail pipe.  This is a very normal thing up here in the 
  25. |> frozen northland.
  26. |> --
  27. |> -val-
  28.  
  29. Is the substance coming from the tailpipe SMOKE or STEAM? Steam is normal --
  30. water condenses in the engine after shutdown, causing excess steam in the
  31. exhaust during warmup.
  32. Smoke, on the other hand, is due to combustion of anti-freeze. It could be
  33. that the car has a small gasket leak causing a buildup of anti-freeze which
  34. combusts during startup, although not causing enough smoke to be noticable
  35. after startup.
  36. -- 
  37. ``````````````````````````````````````````````````````````````````````````````
  38. Stefan Reitshamer      sreit@ctp.com       Cambridge Technology Partners, Inc.
  39.      Opinions expressed herein belong to no one at all (just to be safe).
  40. ``````````````````````````````````````````````````````````````````````````````
  41.