Page 1 of 5 123 ... LastLast
Results 1 to 10 of 48

Thread: bbc motor smoking

  1. #1

    bbc motor smoking

    hi, i had a local machine shop build a 540 chevy motor pump gas with merlin aluminum heads, i started the motor and it smokes, did a leak down and leaks down ok, changed the intake gasket and still smokes , any suggestion, thanks

  2. #2
    Senior Member RACING JUNKIE BEAST477's Avatar
    Join Date
    Feb 2007
    Location
    Michigan
    Posts
    1,908
    Did you run it long enough to seat the rings?
    BEAST477






    Only a rich man can afford to use cheap parts.

    http://www.racingjunk.com/profile/177549

  3. #3
    Senior Member RACING JUNKIE DirkaDirka's Avatar
    Join Date
    Jul 2009
    Location
    Clarksville, TN
    Posts
    1,954
    What color is the smoke?
    Its all fun and games till someone loses a nut!

    http://www.racingjunk.com/profile/400466

  4. #4

    bbc motor smoking

    yes i did run the motor i dont like to drive it because it smokes , and white smoke,

  5. #5
    Senior Member RACING JUNKIE DirkaDirka's Avatar
    Join Date
    Jul 2009
    Location
    Clarksville, TN
    Posts
    1,954
    If I recall right white smoke means it is burning oil.

    IMO I would try a compression check to make sure all the cylinders have around the same compression. Doing this would check to see if the rings are sealing correctly and to make sure the head gasket is not leaking it in the cylinder. Like I said that is something I would check.
    Its all fun and games till someone loses a nut!

    http://www.racingjunk.com/profile/400466

  6. #6
    Junior Member APPRENTICE
    Join Date
    Jun 2003
    Posts
    10

    bbc motor smoking

    i will try thanks

  7. #7
    Senior Member DYNO OPERATOR
    Join Date
    Mar 2008
    Location
    New Orleans,La
    Posts
    515
    what do you mean it leaks ok, what's the #'s

    you may just need to run it some more

    are you losing water,is the upper hose getting hard real fast,water in the oil,fuel in the oil?
    Full Time Racing,WASTED $$ division

    http://www.racingjunk.com/profile/281924

    Be a Fan of Full Time Racing on facebook http://www.facebook.com/pages/FULL-T...G/177402183154

  8. #8
    Senior Member SENIOR BUILDER chevynovaman's Avatar
    Join Date
    Sep 2008
    Location
    CENTRAL WISCONSIN
    Posts
    114
    MY GUESS IS THAT WHITE SMOKE MEANS IS BURNING ANTIFREEZE,, BLUE SMOKE IS OIL....THE BIG BLOCK CHEVYS HAVE THE GEN 4 5 6 AND SOME OF THESE DONT INTERCHANGE... GOOD LUCK...
    1968 CAMARO 302 4 SPD IN THE ROUGH
    1957 CHEVY FUEL INJECTED LS1 4L60E BEAUTY
    1962 CHEVY II NOVA 496 LETS RACE

  9. #9
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007
    Location
    Belleville, IL
    Posts
    658
    Yeah, white smoke is anti-freeze or trans-fluid, not oil.

    Blue is oil.

    If they used trans fluid to clean the cylinder walls (that's what I use), there could be some left over in it.

    If you have a transmission with a failed vacuum modulator and it's plumbed into the intake, that can cause it.

    Or, could be a head gasket.

    Drain the coolant out and fire it up without the water pump belt on it. You can run it for 5 mins or so (from being room temperature) without worry of over heating. See if it still smokes.

    The other thing you can do with it running is to pull off the radiator cap (NOT WHEN IT'S HOT!) and see if it's blowing bubbles in the coolant.

    If it blows bubbles, or doesn't smoke without coolant in it, definitely a head gasket.
    -WJ Birmingham

    OneBadGMC.com

  10. #10
    Senior Member RACING JUNKIE DirkaDirka's Avatar
    Join Date
    Jul 2009
    Location
    Clarksville, TN
    Posts
    1,954
    Thanks for correcting me on the color of smoke. I alwasy get confused on what color is what.
    Its all fun and games till someone loses a nut!

    http://www.racingjunk.com/profile/400466


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy