Quick question...
After a quick Google search, I found this:
From this article:
http://www.gmhightechperformance.com..._engine_build/
Also,
From this article:
http://www.gmhightechperformance.com...l_gallery.html
Need more?
Hope it helps.
The stock bearing cap bolts are tightened from the innermost out. The centers and outers are torque-to-yield spec, while the side bolts are torqued to 18 lb.-ft. MTI looks for 2.5-3 thousandths clearance on the main bearings, 1.8-2 thousandths on the rod bearings.
http://www.gmhightechperformance.com..._engine_build/
Also,
Now, install the main caps by laying them in place; they won't go fully down by hand, as remember they are a tight fit. Insert the main cap bolts and start them by hand (we're currently using the GM bolts for demonstrative purposes that you'll see in a second). To guide the caps down, alternate tightening the bolts side to side to ease the cap all the way down into place. Tighten all bolts initially to 15 lb-ft.
GM's main cap bolts require a special method of tightening that we want to clue you in on; some aftermarket manufacturers specify this method of bolt tightening as well for both main and rod bolts. Basically, the bolt is torqued to 15 lb-ft and is then turned an additional specified angle as measured with a torque angle gauge. Following the sequence outlined by GM in the service manual, the inner main cap bolts get an extra 80 degrees of twist, while 53 degrees is the spec for the outers. Then tighten the side cap bolts to 18 lb-ft (no angle spec for these).
http://www.gmhightechperformance.com...l_gallery.html
Need more?
Hope it helps.
Last edited by BlackHawk T/A; Dec 16, 2006 at 08:03 PM.
