Andy1

Does anyone know what is the bolt pattern for the LS1 flywheel/crank flange? Also, will a GEN I SBC flywheel bolt to the LS1 crank flange?
Thanks,

Andy1

Andy1

I got no hits on the engine side, so thought I'd ask here. Seems this info is hard to come by.
1.) What is the crank flange (flywheel) bolt pattern?
2.) Is the LS1 crank flange pattern the same as the GEN I SBC? I have been told it is except for the center hub diameter. Is it larger or smaller on the SBC I?
3.) I would like to get the bellhousing bolt pattern including the dowel pins. An engineering drawing would be great, or a link to the info.
Perhaps someone can direct me to where I can find the dimensions/information. That would be greatly appreciated.
Thanks,
Andy1

ACW

Hi, just saw this thread... does this help?

BTW, tightening procedure is:
Tighten the engine flywheel bolts first pass in sequence to 20 N·m (15 lb ft).
Tighten the engine flywheel bolts second pass in sequence to 50 N·m (37 lb ft).
Tighten the engine flywheel bolts final pass in sequence to 100 N·m (74 lb ft).