Hi. I'm looking for the exhaust manifold to head bolt torque specs for a 2002 Chevy Trailblazer EXT with a 4.2L. Thanks.
First install all the bolts into the exhaust manifold and snug them hand tight.
Start at the center bolt of the manifold and tighten it to 18 ft lbs, then go to the next one to the rear of the center bolt and then go to the one in front of the center bolt you tightened.
Keep working your way out to the outer ones in the same manor.
Do the same sequence again and re-tighten the bolts to 18 ft lbs again. In the same sequence check it again a third time at 18 ft lbs.
So your working from the center bolts to the outer bolts.
If you need more information let me know.
Thanks a lot for the info TH2. This is the part I was missing.