Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

This is valve seals right? (NEW Q)

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Wally81k5, Aug 14, 2003.

  1. Wally81k5

    Wally81k5 1/2 ton status

    Joined:
    Jul 14, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    Cold Lake Alberta
    My 87 k5 smokes when i start it for about 10 secs, then the first one or two times i come off the gas in neutral or park, but once i drive for 30 secs it fine. This is should be valve seals right?

    I;m doin em on sunday so lemme know if you have any tricks!

    I' gonna use the rope thing as i have no compressor. anything else?

    Also I had a 74 350 and it had the o rings at the top, does my 87 tbi 305 need those or just the umbrella's?

    Thanks for the help!
     
  2. SUBFAN

    SUBFAN 1/2 ton status

    Joined:
    Mar 23, 2003
    Posts:
    2,334
    Likes Received:
    0
    Location:
    Davenport, Ia
    Re: This is valve seals right?

    Yup, valve seals....

    Just Umbrellas....

    Rope should work, good luck. You got a spring compresser?
    Any problems with the springs, or a bigger cam in the future? Now would be a good time to change those springs too....
     
  3. bigblock44k5

    bigblock44k5 1/2 ton status

    Joined:
    Jun 8, 2003
    Posts:
    396
    Likes Received:
    0
    Location:
    Hurlburt Field, FL
    Re: This is valve seals right?

    Yes that would be Exhaust valve seals to be excact. The rope trick should work fine. Just make sure you put a little lube on the seals so you dont burn them out the first time you start it, good luck.
     
  4. Wally81k5

    Wally81k5 1/2 ton status

    Joined:
    Jul 14, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    Cold Lake Alberta
    Re: This is valve seals right?

    Cool, thats what i thought.

    No cam in the future, i have a problem with hopping up a 305!

    What should i lube them with? Just 10w30? Or is there something specific?

    Thanks for the replys.
    I have a valve spring compressor.
     
  5. Wally81k5

    Wally81k5 1/2 ton status

    Joined:
    Jul 14, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    Cold Lake Alberta
    Re: This is valve seals right?

    Oh yeah, while i'm here! Rocker arms, how do i adjust them after i put it all together. Is it snug that 1/2 turn?

    Help me out!

    Ryan
     
  6. tim_87

    tim_87 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    101
    Likes Received:
    0
    Location:
    louisiana
    Hope you have better luck than I did. The seals did not stop
    all of my smoke. Wished I would have spent that money on
    new heads. Just another option to think about.
     
  7. SUBFAN

    SUBFAN 1/2 ton status

    Joined:
    Mar 23, 2003
    Posts:
    2,334
    Likes Received:
    0
    Location:
    Davenport, Ia
    If the guides are worn, then the only choice is to rebuild them....

    Adjust the rocker arms by making sure it is closed. Then spin the p/rod with one hand while tightening the rocker with the other. When you start to feel a little drag, then go a 1/2 turn more.

    Everyone has a different opinion on how much more to tighten the rocker down. Being consistant with anywhere between 1/4 to 3/4 should be fine....
     
  8. the professor

    the professor 1/2 ton status

    Joined:
    Feb 6, 2003
    Posts:
    130
    Likes Received:
    0
    I might have missed it, but you guys forgot the little 0-rings that seal the retainer to the valve stem
    --
    Also, more likely the intake than exhaust... thats where the vacuum is, and also where it gets drawn into the engine to burn..
    --
    If the seals don't cure it.. it might be the intake gaskets.. Chevys (aculaly all intake sealed V engines) tend to leak at the bottom of the intake port, the gaskets get hard and they suck oil from the valley area..acts just like bad valve seals...
    /forums/images/graemlins/cool.gif
     
  9. Wally81k5

    Wally81k5 1/2 ton status

    Joined:
    Jul 14, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    Cold Lake Alberta
    i thought only the pre tbi ones had the o ring!?

    Ryan
     
  10. bigblock44k5

    bigblock44k5 1/2 ton status

    Joined:
    Jun 8, 2003
    Posts:
    396
    Likes Received:
    0
    Location:
    Hurlburt Field, FL
    Actually it points to exhaust vavle seals if it smokes when the engine is first started due to oil leaking into the exhaust. if it was intake seals it would leak all the time hot or cold, mostly during decelleration.
     
  11. Wally81k5

    Wally81k5 1/2 ton status

    Joined:
    Jul 14, 2002
    Posts:
    139
    Likes Received:
    0
    Location:
    Cold Lake Alberta
    anyone know about o rings on the top of the valves on a tbi??
     

Share This Page