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1996 GMC Jimmy Timing chain

Tiny
WGHATCH
  • MEMBER
  • 1996 GMC JIMMY
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
I am replacing the timing chain and spockets (have never been replaced) because of random misfires. When installing the crankshaft sproket, how can I tell if it is 'seated' properly?
Saturday, January 23rd, 2010 AT 11:16 AM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Thanks for the donation

this requires a special service tool.. use service tool number J-5590, or equivalent crankshaft sprocket installation tool, and a hammer to drive the crankshaft sprocket onto the crankshaft, without disturbing the position of the engine.


https://www.2carpros.com/forum/automotive_pictures/261618_1_95.jpg

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Saturday, January 23rd, 2010 AT 10:02 PM
Tiny
WGHATCH
  • MEMBER
  • 2 POSTS
I understand how to "push" the gear back on. What I do not know is how far on the crankshaft the gear needs to go.
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Sunday, January 24th, 2010 AT 12:18 AM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
You have to push the sprocket until it is fully seated on the flange of the crankshaft nose, you will fill it "bottom out" when it is seated properly.
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Sunday, January 24th, 2010 AT 12:49 AM

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