Main studs/ bolts

[wyeto]

Still tracking down everything for the build. Searched but couldn't find much in the way of info on main bolts/studs.

I saw a few people running into problems with arp main studs and I didn't know if people are reusing the stock main bolts or if they are buying new.

At the machine shop where my work is being done they found a bulletin on their engine servicing software that had specs with measurements on reusing head bolts but I don't see anything on main bolts, infact I don"t see much at all in the way of info for the mzr disi..

[jdmage_mx5]

From my little bit of research plus personal opinion; don't reuse either head/main bolts. I don't care about stretch measurements. Head bolts are a bigger concern in this platform anyways.

ARP main bolts do not allow for the Balance Shaft to be reinstalled. If you plan on reinstalling it then you will need to use the OEM main bolts or be prepared to alter the ARP mains.

[ASHMS3]

I have never seen anyone break an OEM main bolt on this platform that wasn't directly contributed to another failure. If you want to keep the balance shaft, go new OEM if even for just peace of mind. It all depends on what your goals and needs for your build are.

[wyeto]

Originally Posted by jdmage_mx5 From my little bit of research plus personal opinion; don't reuse either head/main bolts. I don't care about stretch measurements. Head bolts are a bigger concern in this platform anyways. ARP main bolts do not allow for the Balance Shaft to be reinstalled. If you plan on reinstalling it then you will need to use the OEM main bolts or be prepared to alter the ARP mains.

I am reusing my head bolts for use on the torque plate when the block gets bored, I will be using a new set when bolting the head down.

As for the mains I agree, wouldnt want to cheap out on 60$ worth of bolts to lose your engine.

Originally Posted by ASHMS3 I have never seen anyone break an OEM main bolt on this platform that wasn't directly contributed to another failure. If you want to keep the balance shaft, go new OEM if even for just peace of mind. It all depends on what your goals and needs for your build are.

I agree. Seems the stock fasteners are pretty on point. I plan on using stock head bolts and mains.

Balance shaft will be removed

power goals are in the high 300's and hopefully one day 400 hp, I'm going to be going with a gt2871 turbo.