well im getting things together for my build and i have some questions about the arp rod bolts, and everything that is necessary to install them.

first, how do i install them to the rod? do the old ones need to be pressed out? and the arps pressed back in? and im hearing things about the rod needing to be resized after the install? is this completely necessary? if so please tell me why, and what resizing exactly means and does.

also about torquing vs strtching. which is better o does it matter? has anyone just torqued their's and been ok? if you need to stretch, exactly how much do they need to stretch?

btw this is all for the b18c rod bolts (9mm)
thanks.

 

they jess replace the old ones.. you shouldnt have to press them. They should jess slide in.. Mine did.

 

Bring your bolts and rods to a machine shop.The rods and caps need to be machined before the bolts are installed as part of the resizing prosses.The rods need to be resized to correctly install aftermarket rod bolts such as ARP's.
Glenn

 

why does it need to be resized before the install? the only thing i can think of that would make sense is that pressing the rod bolts out and then pressing the arps in, might distort the rods just slighly, therefore needing to be fixed by resizing. is this correct? and it it possible that i wont need to resize?

i need a reply frm someone who has actually installed these please. i need first hand experience not hearsay.

 

They need to be resized because of the torque difference between the stock and arp bolts. But dont worry, it shouldnt be too much $$ to get done at a machine shop. And I do encourage you to go through with using the arp's on stock rods. Very good upgrade and cheap, reliable insurance.

 

now im all confused. someone please provide detailed information on this. how does the difference in torque affect anything?

 

another question, my pistons are connected to the rods, can the rod blts be installed with the pistons still attached?

 

ok screw it, this seems like too much work then its worth and im not going to go the arp route. ill put the money towards the main studs and a stretch guage to properly stretch the rod bolts.

 

The bolts usually need to be installed with the pistons off the rods.Both the increased clamping force and the press fit can distort the rod bore.The stock rod bolts are not equipped with dimples to use a bolt stretch guage,neither are the spec.s available.The gsr/itr stock rod bolts are strong enough to use with the stock rods,not really a weak point.
Glenn

 

stock ITR rod bolts DO have the dimples for the stretch guage, the ITR manual even advises to install rods this way, rather then torquing. but ive changed mine again, and i think i am gona go with the arp rod bolts, lol. i was getting the wrong idea about the rods having to be resized.

 

well i got the rods back from the machine shop and got the arp rod bolts pressed in, but they couldnt resize them, they didnt have mandrel small enough, so now i gotta find another shop that can do it.