Quote:

While replacing a 5.7 crankshaft the other day I noticed the maincap bolts are marked with 10.9 strength numbers. Would've thought TTY bolts would be a bit softer.
I learned the maincap-bolts are stretchbolts, but I didn't think strong/hard bolts like these could be used as TTY could they?

Torque-specs for the main-bolts is 27 lb/ft and then a 90 degree extra turn.

Can anyone provide the exact length of new/stock sized main bolts?
I wonder how much a torqued TTY bolt has stretched compared to a new bolt.



Wish I could help, but I always replace the mains with ARP fastners, which BTW changed their instruction spec's to install them like you would using tq to yield bolts. I tried their method once and that was enough. Thought I might have to use a breaker bar on the end of my digital tq wrench to get that extra 90* turn. Here are my spec's that I use when using ARP G3 main studs. Alighn hone main bearing housing to 2.7520 with studs @ 110# tq with oil. 25# on on the side bolts using Ultra gray between the block and washer.

Jerry Williams.