CA18DET ARP Torque Specs

[cbh148]

For CA18DET,
ARP Head Studs: 75 ft-lb
ARP Main Studs: 60 ft-lb
ARP Rod Bolts: 45 ft-lb Part # 202-6001

I know this thread may seem pointless, but you'd be surprised how hard it is to find this info (going through ARP's catalog, etc), especially when most of this ARP stuff comes from other engines which can make the included instructions wrong (for example, the ARP main stud kit for CA18 is a Saturn 1.9 head stud kit), so I figured I'd contribute so someone can google it and kill 3 birds with one stone.

[boost_boy]

Hmmm, I use none of those torque specs for the CA when it comes to ARP. I would never tighten any rod bolt to 45 ft/lb nor my mains to 60. That is just a bit too extreme, but then again we have our own perceptions as to the way things work, too.

[cbh148]

Hmmm, I use none of those torque specs for the CA when it comes to ARP. I would never tighten any rod bolt to 45 ft/lb nor my mains to 60. That is just a bit too extreme, but then again we have our own perceptions as to the way things work, too.

Feel free to chime in with what you run. This is just me reciting the specs that I've found.

[cbh148]

This is where I got the main stud info.

[boost_boy]

The issue here is to not get to into the "Well Dee said" drama and there have been many-a-knuckle-head that have disregarded the advice that was given to them and they ultimately had problems or sold their swaps. I've been in this game a long time, so this is nothing new to me. If ARP tells you guys to tighten your motors to their specified torque, then by all means adhere to what they say as they are the manufacturer and besides if anything goes wrong, blame ARP. If people wanted to deal with me individually, then perhaps I'd consider sharing personal info from personal experiences.

[mdb4879]

I thought those specs were on the high side as well, but as you said, that's what ARP says to use so I guess that's what I'd do if I used them. Preferably I'd take it to a machine shop and have them assemble it since they deal with this stuff on a daily basis and I would assume they have some math they use in determining an engine's assembly specs (but we know how that's turned out for Casey so far and in about an hour you'll see what I'm talking about). Also, it seems bearing manufacturers give torque specs for their bearings as well, so really I have no idea what to follow. I would prefer to use the specs in the FSM or provided with the bearings since I don't see why ARP hardware would need to clamp harder.