torque specs

2003 CHEVROLET ASTRO
105,000 MILES • 6 CYL • 2WD • AUTOMATIC
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DONNIE3038
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  • 3 POSTS
what are the torque specs for a 2003 chevy 4.3l main bearing?
Feb 13, 2011 at 9:06 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
15 ft lbs on first pass, then add 73 degrees, or 77 ft. lbs
Feb 13, 2011 at 9:11 AM
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MERLIN2021
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  • 17,250 POSTS
77 ft lbs is secondary method!
Feb 13, 2011 at 9:12 AM
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DONNIE3038
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  • 3 POSTS
thanks merlin. do you have the specs on the rod bearings too? i used to go to 45 ft lbs on the older ones, but i see the mains have changed so the rods im sure have too.
Feb 13, 2011 at 9:16 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
snug, then 20 ft lbs second pass 70 degrees, post your email and I will send the rebuild guide...
Feb 13, 2011 at 9:23 AM
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DONNIE3038
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  • 3 POSTS
donaldscott42@yahoo.com
Feb 13, 2011 at 9:27 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Guide on the way!
Feb 13, 2011 at 9:31 AM
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