arp rod torque?

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06-13-2007, 10:10 AM
rrruschman

arp rod torque?

I bought some connecting rods with arp bolts for our 454 last year and am now getting around to installing them. I have nothing with them and the place I bought them from no longer exists. I have searched everywhere and cannot find the torque for the bolts. The bolts were already on the rods they look like 3/8 with 12pt. nuts. Does anybody know the torque? Thanks for any help.
06-13-2007, 10:34 AM
shoprat

I would torque them as any other 3/8 rod bolt
Ron
06-13-2007, 11:00 AM
robot

Gee, the ARP web site has some info...imagine that!

http://www.arp-bolts.com/Tech/TechTorque.html
06-13-2007, 01:38 PM
rrruschman

I went to that site and the 2 part number possibilities had a hex nut, this is a 12pt. the torque could be the same, I would just like to be sure. Thanks.
06-13-2007, 01:47 PM
robot

I thought that I saw three possible part numbers....anyway, a quick call to ARP should do the trick...I have called them about torques on their products and they have always been very helpful. CORRECTION, there are two part numbers for 7/16 bolts with 12 point nuts......you said they were 3/8.....can you check your bolt dia again?

mike in tucson
06-13-2007, 02:08 PM
pat mccarthy

arp 3/8 bolts are 50 with nuts. cap screws 65 thats with there moly past. you need to see if they are 2000 or l19 cap screw bolts? will be more. if it has a nut then 50 will work on 3/8 on there 8740
06-13-2007, 06:19 PM
Dave Severson

I believe ARP suggest a bolt stretch gauge over a torque wrench...Might want to check, I suppose it depends on which bolts you have....Pat probably knows, heck he's the only one who admits to runnning a BBC!!!!!!!!!!:LOL: :LOL: :LOL: :LOL: :LOL: :LOL: :LOL:
06-13-2007, 07:14 PM
erik erikson

ARP bolts

One thing to remember is make sur the threads are fully coated and that you put a little bit right under the head of the bolt or capscrew.
Yes,Dave I will admit I own and love to build the BBC.
06-13-2007, 07:17 PM
Dave Severson

Quote:

Originally Posted by erik erikson

One thing to remember is make sur the threads are fully coated and that you put a little bit right under the head of the bolt or capscrew.
Yes,Dave I will admit I own and love to build the BBC.

Oh yeah!!! Forgot about that monster you have...Sorry bout that!!!!
06-13-2007, 07:33 PM
pat mccarthy

Quote:

Originally Posted by Dave Severson

Oh yeah!!! Forgot about that monster you have...Sorry bout that!!!!

i am working on my 730 thats not a monster ???? but hey dave them bbc big blocks are all monster :D
06-13-2007, 09:24 PM
Dave Severson

Quote:

Originally Posted by pat mccarthy

i am working on my 730 thats not a monster ???? but hey dave them bbc big blocks are all monster :D

Don't make me post another picture of that 815 Ford Hemi again!!!!!!!!!:LOL: :LOL: :LOL:
06-14-2007, 06:15 PM
rrruschman

Thanks everybody, I think I am going to torque to 50Lbs. 5 times. I do not have a stretch gauge and tired of searching and racking my brain. So its time to get er done and move on.
06-14-2007, 07:13 PM
pat mccarthy

only 3 times... at 50. so they have been re con they are at one or at 3 times or if new rods 1 time .when i do them i run them up and down 3 times in the rods vise and if you want the stretch is .0060 to .0067 for 8740 arp rod bolt on the heads it will say what it is you need to post that then i can give you the right TQ
06-14-2007, 08:34 PM
erik erikson

Quote:

Originally Posted by pat mccarthy

only 3 times... at 50. so they have been re con they are at one or at 3 times or if new rods 1 time .when i do them i run them up and down 3 times in the rods vise and if you want the stretch is .0060 to .0067 for 8740 arp rod bolt on the heads it will say what it is you need to post that then i can give you the right TQ

Pat I do about the same thing except I will leave them "torqued up" over night back them off and check the stretch one last time.
06-15-2007, 10:16 AM
rrruschman

I beleive these are the 2000 at least thats the closest I can come up with and they are 3/8 with 12pt. nuts, they also appear not to be the wave lok. The picture on the arp site site looks like the 2000. The rods are new 5140 I-beam, never got any paper with them as far as torque. As for torqueing them and leaving overnight thats a great idea. What about loctite on the final torque?
06-15-2007, 03:06 PM
pat mccarthy

no On Loctite all ARP bolts are marked if you can not see that then it is not ARP if it is ARP it is on the head and will say that it is 2000 8740 etc the way erik TQ them and lets them set will not help you less you know the stretch of the bolt you have ?? i go thru them with the bearing in the housing
07-05-2007, 06:40 AM
Racecar100

When I torque the rod bolts I usually check it with a strech gauge, I found that 3/8 ARP bolts strech at .0055 at 60 foot pounds and 7/16 bolts at 80 foot pounds. Now that with ARP lube...