Junkyard 5.9L Magnum + Edelbrock LA heads build

nm9stheham said

Yep that is what I would think too. Maybe now they are 'pre-worn' to be round LOL.

FWIW... I've had certain 4 banger blocks distort .003-.004" in the #4 cylinder by just putting in the top bellhousing bolts and torquing them lightly....!

Can you give a bit more detail on the head bolt hole changes on the GenIII ?

Click to expand...

Yeah it makes me want to make sure my torque wrench is accurate before putting the heads on, I know the head studs will probably put different loads on the cylinders but I don't think I'll be taking this thing another 50k miles to make a difference.

I read about the G3 Hemi head bolts in an SAE article about new manufacturing methods used for the engine, the authors didn't go into much detail but engineers basically found the head bolts could be made shorter and somehow pull the clamping load more from around the cylinder than the cylinder itself. I have a 5.7 short block on a stand in my garage I should take a look...