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.

stretched timing chain?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by MudRebel350, Jun 3, 2000.

  1. MudRebel350

    MudRebel350 1/2 ton status

    Joined:
    May 20, 2000
    Posts:
    324
    Likes Received:
    0
    Location:
    N.J.
    I went to set my timing and noticed it was about 8 degrees advanced before i started. I set it to 0 degrees and drove it around for awhile. The truck had poor excelleration and hesitated a little bit when i'd start off from a light. My stepdad suggested it was advanced by the previous owner to compensate for a stretched timing chain. i set it back to 8 degrees and it drives better with no hesitations and no poor excelleration. Is there any disadvantages of having my timing advanced that much? The truck has 111,889 miles on it.

    J.D.
    88 Gmc Jimmy
     
  2. Waxer

    Waxer 1/2 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    1,857
    Likes Received:
    0
    Location:
    Long Beach, CA.
    It might run a little hotter that way, and gas consumption will be a little higher as well. I had the same problem. I replaced my timing chain (which was stretched) with a new double roller. I compared the old and the new, I hung them on a screwdriver side by side and the old chain hung an inch lower than the new. All is good now.
     
  3. 79Cheyenne

    79Cheyenne 1/2 ton status

    Joined:
    Feb 19, 2000
    Posts:
    116
    Likes Received:
    0
    Location:
    Atlanta,GA
    I may be mistaken but shouldn't the timing be set for 8 degrees advance?

    <font color=orange>1979 BLAZER Cheyenne[​IMG]
     
  4. Zack

    Zack 1/2 ton status

    Joined:
    Feb 18, 2000
    Posts:
    329
    Likes Received:
    0
    Location:
    IL, USA
  5. Waxer

    Waxer 1/2 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    1,857
    Likes Received:
    0
    Location:
    Long Beach, CA.
    Isnt it supposed to be set at 8 degrees BTDC?
    isnt anything before 0 Advanced, and anything after is retarded. or is it the other way, damn, you all got me thinking and my brain hurts from the brewskies.
     
  6. MudRebel350

    MudRebel350 1/2 ton status

    Joined:
    May 20, 2000
    Posts:
    324
    Likes Received:
    0
    Location:
    N.J.
    it says on the tune up decal 0 degrees. Im only going by the procedure.

    J.D.
    88 Gmc Jimmy
     
  7. Eagle86K5

    Eagle86K5 1/2 ton status

    Joined:
    Mar 5, 2000
    Posts:
    974
    Likes Received:
    0
    Location:
    Whitehouse, Ohio
    Better to go ahead and replace it, if you have never had the headaches of one jumping time, you don't want them...

    <font color=green>[​IMG]Eagle86K5[​IMG]<font color=red>
    Masonry...It's a Good Thing
    2B1ASK1
     
  8. Jason73K5

    Jason73K5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    592
    Likes Received:
    0
    Location:
    Fresno, Ca
    0 degrees just doesn't sound right to me. My '73 is set at about 14 degrees and runs great. I've had other vehicles that I've went as far as 40 degrees advanced, but never seen anything that ran good at 0. I'd say stick somewhere between 8 and 15 degrees.
     
  9. Blazer1970

    Blazer1970 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,600
    Likes Received:
    0
    Location:
    Old Mission, MI
    He has an '88, and it has computer controlled advance. You have to disconnect a wire that disables the computer advance, and then set the timing to 0 degrees. My question is, did you disconnect the wire before you checked and set the timing?

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  10. hpfire7227

    hpfire7227 Registered Member

    Joined:
    Mar 14, 2000
    Posts:
    75
    Likes Received:
    0
    Location:
    Holland Patent, NY
    That's right! You need to unplug that computer advance wire. Also, I have an 89 and according to the sticker it should be at 0 degrees BTC. Right now it is at about 4 degrees BTC and it pings a little but runs strong.

    10 BOLTS O' FUN
     

Share This Page