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Help! BIG cloud of smoke after idling.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 87superblaze, Feb 24, 2002.

  1. 87superblaze

    87superblaze 1/2 ton status

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    I tried searching for this because I am sure it was discussed before but nothing.

    Anyway, I have alot of smoke coming out the tail pipes after the blaze is warmed up and idling for awhile. You know, when your in line at McDonalds or something.

    I allready replaced the valve seals. About 1/2 of the darn things were missing! The smoking still didn't go away! My compression on the engine is almost perfect, range from 150-155. It doesn't smoke on startup either! It's an 87 TBI 350.

    This is very embarassing when the guy behind you has to roll up his windows because there is so much smoke.

    Any suggestions? I am doing the fix (if there is one) on Monday. Got the day off!<P ID="edit"><FONT class="small">Edited by 87superblaze on 02/24/02 08:41 AM.</FONT></P>
     
  2. 4x4k20

    4x4k20 1/2 ton status

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    when you had your valve covers off did you check the oil drain holes in the heads if they are stopped up it will cause it to smoke

    4x4k20
     
  3. chevyracing

    chevyracing 1/2 ton status

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    Did you use umbrella or o ring seals? Umbrella are the way to go. If you used o ring seals with worn guides that could happen.
    Another thing to check is you PCV valve. Pull it out and shake it. If it rattles it is probably good, if not replace it.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>BLAZER PICS</a>
     
  4. 87superblaze

    87superblaze 1/2 ton status

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    No I never checked the drain holes. Never thought about that!! Maybe the missing old valve seals are plugging the holes and causing too much oil in the valve covers?? I'll try this and let you know. Do I just stick something down the hole to push everything out? That would prabably also mean I need to pull off the oil pan! &gt;:( These projects never end!!

    I used the umbrella type of seals. The seals that were on the truck were also the umbrella type.

    My Truck <a target="_blank" href=http://www.community.webshots.com/user/nicksm79>http://www.community.webshots.com/user/nicksm79</a>
     
  5. 4x4k20

    4x4k20 1/2 ton status

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    if your engine is like mine alot of miles i wouldnt worry about pulling the oil pan just get out what you can the rest will settle in the bottom of the oil pan just after you do it run it a little while and change the oil.

    4x4k20
     
  6. 87superblaze

    87superblaze 1/2 ton status

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    BTW, there is one thing I didn't mention. The blue smoke only comes out the left pipe(driver side pipe).

    One other thing to consider, I started to notice this after my new exhaust because it now exits out the back of the blaze. It use to cut off under the truck where I can't see anything.
    Anyway, I ran open headers to the muffler shop about 15 miles from my house. Would this have affected the valves at all and cause it to smoke? just some food for thought.

    My Truck <a target="_blank" href=http://www.community.webshots.com/user/nicksm79>http://www.community.webshots.com/user/nicksm79</a>
     

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