lower timing belt pulley loose

Discussion in 'Gen 1 & 2 - Emergency Issues - Performance Upgrade' started by SuperHO, May 9, 2012.

  1. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    Can someone use small words and explain to me why my lower timing belt sprocket at the crank has about 10* of slop in it? I've got the crank pulley bolt off and there's no signs of crank cancer. But that lower sprocket feels loose, however not free spinning. Quick help here, yall....
     
  2. TimboSHO

    TimboSHO Novice

    Joined:
    Aug 22, 2002
    Messages:
    2,236
    Likes Received:
    680
    Location:
    Wyoming, MI
    Crank cancer is the only explanation. Either the lower sprocket is worn, or the key is worn (or most likely both). You'll have to pull it to see what damage is done....
     
  3. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    The crank pulley's tight, and there's no gap at all around the woodruff key.

    So assuming that sprocket's FUBAR, do I just replace it and move on?
     
  4. jayro

    jayro Well-Known Member

    Joined:
    Apr 8, 2006
    Messages:
    1,918
    Likes Received:
    349
    Location:
    Auburn, In
    Could you explain more then. The key holds sprocket to keep it from moving. If it is moving without the crank moving, then there has to wear somewhere. Either the sprocket, the woodruff key or the keyway on the crank. You will need to pull it ans inspect the componants.
     
  5. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    After I pulled the crank pulley bolt, there's no sign of damage on the crank pulley. I haven't yet yanked the crank pulley to fully inspect the timing sprocket, though I suspect it has somehow succumbed to forces of nature...
     
  6. TimboSHO

    TimboSHO Novice

    Joined:
    Aug 22, 2002
    Messages:
    2,236
    Likes Received:
    680
    Location:
    Wyoming, MI
    Just because you pulled the bolt and don't see any damage doesn't mean there isn't damage further in. You say there are no signs of crank cancer..... I'd say a timing pulley that moves back and forth on the crank is a sure sign of crank cancer......
     
  7. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    You're right....I'm just sleep deprived and mentally drained.
     
  8. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    So I was in my garage getting something unrelated and stumbled across an epic facepalm.....it would appear that when I changed my front main seal, I neglected to put in that thin washer that goes behind the timing sprocket. Feel free to point and laugh.
     
  9. digeronimo34

    digeronimo34 RESCUE SHO

    Joined:
    Apr 3, 2010
    Messages:
    240
    Likes Received:
    83
    Occupation:
    Makin the money
    Location:
    L.I. New York
    oops . well that's am easy fix
     
  10. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    Yeah, especially once I get a new pulley and likely a new woodruff key.
     
  11. Eric VerValin

    Eric VerValin PiMPSKiLLET

    Joined:
    Mar 28, 2005
    Messages:
    3,185
    Likes Received:
    647
    Gender:
    Male
    Occupation:
    Journeyman Electrician
    Location:
    Fort Wayne, Indiana
    I always like the ones who forgot the washer on the other side of that timing sprocket. Seen a few timing belts saw their way through the covers. :)
     
  12. TimboSHO

    TimboSHO Novice

    Joined:
    Aug 22, 2002
    Messages:
    2,236
    Likes Received:
    680
    Location:
    Wyoming, MI
    I would point and laugh, but cannot because I have also been human and done stupid stuff like that..... :nut:
     
  13. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    A lil update.....the keyway looks fine. It would appear the screws holding the CKP vane in place fell out allowing it to just flop around willy-nilly. Tis certainly a new one to me....
     
  14. boat

    boat Likes blue ones

    Joined:
    Feb 29, 2008
    Messages:
    1,356
    Likes Received:
    761
    Occupation:
    Engineering
    Location:
    Fort Wayne, IN
    Glad you figured it out. Done stuff like that, too. :)

    How did you know the timing belt sprocket had slop in it if you all you had done was pull the crank bolt and not the crank pulley and lower timing cover?
     
  15. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    It moved freely when i pulled the belt.
     
  16. somedude_001

    somedude_001 SHO Member

    Joined:
    Jun 2, 2004
    Messages:
    2,657
    Likes Received:
    312
    Location:
    Western NY
    i'm confused
     
    boat likes this.
  17. boat

    boat Likes blue ones

    Joined:
    Feb 29, 2008
    Messages:
    1,356
    Likes Received:
    761
    Occupation:
    Engineering
    Location:
    Fort Wayne, IN
    Me too.
     
  18. SuperHO

    SuperHO Mental Patient

    Joined:
    Sep 8, 2002
    Messages:
    5,695
    Likes Received:
    1,365
    Occupation:
    Dinner Delivery
    Location:
    St. Joe, MI
    Home Page:
    As I pulled up on one end of the belt, it'd grab the pulley and make it rock back and forth
     

Share This Page

If you wish to help keep SHOforum running, please click the donation button below