1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Blowing blue smoke out the back

Discussion in '40- & 55-Series Tech' started by sambudo, Oct 27, 2003.

  1. sambudo

    sambudo

    Messages:
    120
    Likes Received:
    0
    Joined:
    Jun 24, 2003
    Location:
    Wheaton, IL
    What could the problem be? ??? My engine only has 65K orginal miles on stock F engine. This seems to only happen when I am going up hill, ocasionally down hill. But then is goes away and doesn't happen for a long time. :ban: What are some things that could be happening?

    What are some corrective actions that should be taken?

    Thanks, for the help! :beer:
     
  2. snelson

    snelson

    Messages:
    70
    Likes Received:
    0
    Joined:
    Sep 8, 2002
    blue smoke means that you are burning oil :'(, i have never been inside a f motor but on most motors it could be bad valve seals, valve guides, piston rings a number of things get out your pocketbook because blue smoke usually is not a good sign good luck. :cheers:
     
  3. vtcruiser60

    vtcruiser60 SILVER Star

    Messages:
    2,550
    Likes Received:
    2
    Joined:
    Sep 23, 2003
    Yeaooooch. Not a good sign, especially on a low miles cruiser. Your engine is combusting oil. Check the Haynes manual for diagnosing whether to overhaul your motor. In that section you'll note a series of steps to diagnose the combustion problem such as pulling your plugs and examining them for various indicators....carbon, oil, ash, etc. You can also have a compression check done, or do it yourself. Follow through on dabbing a squirt or two of oil to the cylinder after a compression to see if your piston oil seals are leaking or if the oil is coming from the head. If it is a rebuilt head you need, you may be talking $4-650 depending on how much labor you do. If the head is cracked add $400 to that. An overahaul of the lower motor, the full block, will be much more.

    Just my two cents....-K
     
  4. Pin_Head

    Pin_Head

    Messages:
    14,319
    Likes Received:
    1,914
    Joined:
    Feb 6, 2002
    Location:
    OC, CA
    It is most likely a leaky valve seal on #6. If the compression is fine, it is no big deal. Live with it until something more significant happens.
     
  5. Rice

    Rice SILVER Star

    Messages:
    4,464
    Media:
    10
    Albums:
    1
    Likes Received:
    5,319
    Joined:
    May 2, 2003
    Location:
    GSO NC
    Like pin Head said ... oil is getting into the chamber but if compression is good keep driving and change the plugs a little more often. Wait until something more needs fixing.
     
  6. TJDIV

    TJDIV Back in The U.P.

    Messages:
    2,063
    Media:
    9
    Albums:
    1
    Likes Received:
    2
    Joined:
    Jan 28, 2003
    Location:
    Upper Michigan
    Here Here...I drove until I lost cylinders. That was fun....well...now of course I sold the cruiser like that too....
     
  7. drexx

    drexx

    Messages:
    540
    Likes Received:
    6
    Joined:
    Sep 8, 2003
    28Oct2003 (UTC -7)

    Hypothetical question: what if it's blue smoke by a diesel engine, given same conditions as original question?
     
  8. Landpimp

    Landpimp

    Messages:
    15,806
    Media:
    1
    Likes Received:
    1,776
    Joined:
    Mar 14, 2003
    Location:
    Gig Harbor WA
    [quote author=Pin_Head link=board=1;threadid=6789;start=msg55787#msg55787 date=1067287545]

    It is most likely a leaky valve seal on #6. If the compression is fine, it is no big deal. Live with it until something more significant happens.
    [/quote]

    you can also get a vucuum gauge and hook it up, if all is well it should be 18-22 and steady, if a leaking seal then it will bounce around.....I think. Under tech on IH8Mud there is a good artical on vacuum and what it can tell you.

    John H
     
  9. snelson

    snelson

    Messages:
    70
    Likes Received:
    0
    Joined:
    Sep 8, 2002
    hypothetical answer: if a diesel is blowing blue smoke it is also burning oil