1998 GMC Safari engine knocking consistent

1998 GMC SAFARI
125,000 MILES • 6 CYL • AWD • AUTOMATIC
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MMG
  • MEMBER
  • 1 POST
engine knocking- 4 or 5 knowledge people already
inspected, no one being able to pin point why or
where is knocking coming from, so I took the chance
strip the top end without touching the crank- so it
was found the timing chain too strech, it was replace
new with a set of sprocket,cam,lifters,rod,rockers-
balance shaft-gear-bearings were inpected by machi-
ne shop everything seem ok- I desired to assemble
back together, nor a chance still knocking bad, it's a
kind of misleading- I been toll to check torque conver-
ter it seem fine-weigths-weld-bolts-no cracks showing
any tip or advise-Please will be appreciated-(w) very
difficult to work on it-Thanks for your time and your
professional advice. MG
Oct 26, 2009 at 3:33 PM
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DOCFIXIT
  • ASE Certified Mechanic
  • 18,828 POSTS
  • ASE Certified Mechanic
Either rod bearings or wrist pins bushings at pistons
Oct 27, 2009 at 12:21 PM
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