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.

clicking, tapping, etc.

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by johnny reb, Nov 27, 2001.

  1. johnny reb

    johnny reb 1/2 ton status

    Joined:
    Mar 6, 2000
    Posts:
    326
    Likes Received:
    0
    Location:
    Pittsburgh, PA
    I hate the strange noise posts but I'm stumped on this one. I only get a tapping/clicking noise when my truck is in drive. Engine purrs like a kitten when in park or neutral. I can rev it up and it sounds fine. As soon as i put it in drive, the tapping/clicking starts and it increases proportionally when I accelerate. Even if I'm at a stop while in drive I can hear it. It sounds like the tapping that occurs when headers are loose but louder. I've tightened my headers and all exhaust clamps but that didn't do anything. It sounds like it's coming from the bottom of the engine somewhere near the oil pan or in that general area. I just can't make sense of it since it only occurs while in drive. Any suggestions?

    1986 K5, New GM 350, Edelbrock Intake, K&N Air Filter, Flowtech Headers, Dual 3" Exhaust, 33" Pirelli Scorpion AT, 700R4, 3.42 gears
     
  2. jimmyjack

    jimmyjack 1/2 ton status

    Joined:
    May 11, 2000
    Posts:
    2,290
    Likes Received:
    0
    Location:
    Tucson Az
    Broken flexplate. Mine did that for so long I just kind of didn't listen to it anymore. I replaced the flexplate when I redid my motor and it went away. When I looked the old one over it had two big cracks in it.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    Whats your oil pressure when this happens. Probably isnt the motor, but might as well dismiss it for sure. I would say it might be your torque convertor or oil pump in your transmission.

    <a target="_blank" href=http://new.wavlist.com/movies/031/ag-blow.wav>"I ain't nobody, dork."</a>
    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  4. Blazer_Boy

    Blazer_Boy 1/2 ton status

    Joined:
    Dec 16, 2000
    Posts:
    1,669
    Likes Received:
    0
    Location:
    Sioux City, IA, USA
    Ah never thought about that..... Pull of the cover on the bottom of your bellhousing and shine a flash light up there. If you have some degree of strength, you should be able to grab on and turn the flexplate by hand. It isn't too impossible to change. I'd just slide the transmission back far enough to get up in there.

    <a target="_blank" href=http://new.wavlist.com/movies/031/ag-blow.wav>"I ain't nobody, dork."</a>
    <a target="_blank" href=http://www.geocities.com/bigkern76>http://www.geocities.com/bigkern76</a>
     
  5. johnny reb

    johnny reb 1/2 ton status

    Joined:
    Mar 6, 2000
    Posts:
    326
    Likes Received:
    0
    Location:
    Pittsburgh, PA
    hmmm. I had the crate motor installed about 8,000 miles ago and flex plate at the same time. it's not normal for a flex plate to go bad that quickly is it? what would cause a flex plate to go bad?

    1986 K5, New GM 350, Edelbrock Intake, K&N Air Filter, Flowtech Headers, Dual 3" Exhaust, 33" Pirelli Scorpion AT, 700R4, 3.42 gears
     
  6. jimmyjack

    jimmyjack 1/2 ton status

    Joined:
    May 11, 2000
    Posts:
    2,290
    Likes Received:
    0
    Location:
    Tucson Az
    Maybe one of the bolts backed out a little bit. I would think mostly torque from the starter could crack a flexplate. They're not very beefy.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  7. johnny reb

    johnny reb 1/2 ton status

    Joined:
    Mar 6, 2000
    Posts:
    326
    Likes Received:
    0
    Location:
    Pittsburgh, PA
    what is the difficulty in checking and tightening the bolts. any help is appreciated

    1986 K5, New GM 350, Edelbrock Intake, K&N Air Filter, Flowtech Headers, Dual 3" Exhaust, 33" Pirelli Scorpion AT, 700R4, 3.42 gears
     
  8. hammer

    hammer 1/2 ton status

    Joined:
    Aug 29, 2001
    Posts:
    449
    Likes Received:
    0
    Location:
    Binghamton N.Y.
    torque converter bolts loose. Freinds truck sounded like a knock but back farther and torque converter wasn't tight enough. take the cover off only a few bolts covering it 10 min to check, might be your whole problem
     
  9. jimmyjack

    jimmyjack 1/2 ton status

    Joined:
    May 11, 2000
    Posts:
    2,290
    Likes Received:
    0
    Location:
    Tucson Az
    Remove the cover, I think the bolts are either a 5/8 or 11/16. Kinda hard to keep the flywheel from moving when your cranking without a special tool. Just crank down the bolts.There are 5 or 6 of them. While your there take a flashlight and inspect the flexplate and look for cracks too.

    That jeep thing? Yah I understand it....... Like my Blazer? <a target="_blank" href=http://community.webshots.com/user/blazerk5>http://community.webshots.com/user/blazerk5</a>
    Jim
     
  10. shawnboy

    shawnboy 1/2 ton status

    Joined:
    Jun 22, 2001
    Posts:
    468
    Likes Received:
    0
    Location:
    Toronto, Canada, eh.
    Trust me, don,t use yours hands to turn it by hand. OUCH!!!!! Get the right tool for the job.It's not a pleasant experience when you catch your hand in there.
    Shawnboy.

    <font color=red>If you are having too much fun it's probably illegal.</font color=red>
     
  11. high&liftedup

    high&liftedup Registered Member

    Joined:
    Nov 14, 2001
    Posts:
    64
    Likes Received:
    0
    Location:
    CA
    if its a AUTOMATIC.... I had the same issue, mine was a craked torque converter....sounds similar... I was fortunate it didn't blow up during a run.....

    HE will always get you out of the mire clay!!!
     

Share This Page