ARP bolts on 1G rods... Machining Necessary?

[hybridmitsu]

I have my head already on my 6bolt block and everything else is pretty much on as well, except the oil pan. The block has ARP main studs but just the stock rod bolts.

I was thinking before I put the oil pan on I should probably replace those stock rod bolts with some ARPs. Can I just take the stock ones out and replace them with the ARPs, or will I need to do some sort of machining to make them fit.

 

[JamiesTSI]

The correct way to do this is to re-hone the large end once the ARP hardware is installed. Taking the OEM ones out is pretty easy and straight forward as well as putting the ARP studs in. Trick is to make absolutly certain that the ARPs are sitting on the rod shoulder.

ARPs are a great upgrade for the 1st gen rods.

On my set up I went with stock rods that where polished, shot peened, ARP studs, re-honed large end, balanced, and converted to full float.

 

[hybridmitsu]

Well my block is on the stand right now. So I can't just spin it upside down, take out the stock rod bolts and torque down some new ARPs.. I have to remove the rods from my block and get them rehoned?.. I was hoping it was just a bolt on affair and then I could put my oil pan back on.

 

[JamiesTSI]

I guess you could but it would not be the correct way of doing it. Personal opinion, you would be taking a big, big risk by doing it the way you mentioned.

The best way would be what I said in post #2.

Are you planning on some big numbers from this rebuild? If so put the ARPs in and do it the correct way.

 

[hybridmitsu]

Well if I can't put the ARP's on then I won't go over 400hp. If I do get the ARP's on then I would like to try for 450hp instead.

Im just worried about the stock rod bolts tearing off the end of the rod if I push too much power through my block..

 

[Big Woo]

You should be able to get the big ends re-sized for $10 to $12 each so that is only going to cost you 40 to 48 bucks. They may also charge you a small fee to install the bolts. Still you are not looking at a large expenditure here. I would vote for doint it right the first time, and not having to worry about it later.