ARP BOLTS...good idea or not?
ARP BOLTS...good idea or not? I've got my heads off and I'm considering the ARP head bolts instead of the factory torque to yeild bolts. The only thing that makes me hesitant is the fact that the bottom end was assembled with the OEM bolts using a block with factory stock specs. I was told by an engine builder that if the ARP bolts are used, they put a slightly different twist on the block. He said if the block was originally assembled with ARP bolts using torque plates when it was honed, the ARP bolts won't deform the block. If I pull out my OEM bolts and replace them with ARP bolts, the block will deform or twist in a slightly different way because the ARP bolts will have a slightly different clamping load on the block. Personally, I think you could run either set of bolts. What are your thoughts out there?
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Joined: Mar 2004
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From: Austin, Texas
I've got my heads off and I'm considering the ARP head bolts instead of the factory torque to yeild bolts. The only thing that makes me hesitant is the fact that the bottom end was assembled with the OEM bolts using a block with factory stock specs. I was told by an engine builder that if the ARP bolts are used, they put a slightly different twist on the block. He said if the block was originally assembled with ARP bolts using torque plates when it was honed, the ARP bolts won't deform the block. If I pull out my OEM bolts and replace them with ARP bolts, the block will deform or twist in a slightly different way because the ARP bolts will have a slightly different clamping load on the block. Personally, I think you could run either set of bolts. What are your thoughts out there?
The guy who told you this is correct. When you torque plate hone a block you need to use the head bolts or studs you will be running.
It doesn't twist the block, the torque of the bolts or studs try to square the cylinder bore. It's why we torque plate hone blocks in the first place. There will be a difference in how round your cylinders are going from a stock fastener to an aftermarket one, period.
I doubt you will blow the motor up because of it, but you will not have as round a bore as you would if you run the bolts the block was torque plate honed with.
The rings will take more time to seal up, which by the ways means more wear on them before they are broken in correctly.
Why are you wanting to run the A.R.P. fasteners now?
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The engine builder is completely correct in this manner. Your best bet would be to go the the OEM studs but I dont personally feel you will do any engine damage with using the studs.
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