Rod Bolt Torque

Mike Pearson · 06-29-2008, 12:46 PM

What is the recommended rod bolt torque spec for small block Chevy small journal OEM rods. 283 style. Aftermarket bolts... Thanks...

Alan Roehrich · 06-29-2008, 01:04 PM

Which aftermarket bolts?

Mike Pearson · 06-29-2008, 02:35 PM

I think they are ARP bolts. As we remember the tourque was 43 ft lbs. The bolts have a dimple for a strrech gauge so they are a premium bolt.

Alan Roehrich · 06-29-2008, 02:40 PM

ARP bolts will have ARP roll marked into the bolt head.

Mike Pearson · 06-29-2008, 09:17 PM

Thanks, I guss there not ARP bolts. Maybe MR Gasket???? Anyone know what the torque is for the factory bolts are?

Alan Roehrich · 06-29-2008, 09:21 PM

The factory torque is about 32 to 35. However, that will not properly load an aftermarket bolt, and will likely cause a failure. Usually SPS marks their stuff just like ARP does. I'd be VERY hard pressed to use an unknown bolt. If you don't know what they are, get a machine shop to put some ARP bolts in for you.

Adger Smith · 06-29-2008, 09:21 PM

What kind of nut do they have?... Footed or crush lock/crimped? Stock for 11/32 bolt is 35 w oil

Mike Pearson · 06-30-2008, 08:56 AM

After researching a little more They are either ARP high performance rod bolts or pioneer bolts. Looks like both manufacturers recommend 40 ft lbs. The nuts are a standard thread no locknut.

Adger Smith · 07-01-2008, 07:52 AM

Mike,
The Pioneer for that engine use a crimp lock nut. It is crimped on 3 sides at the top of the 1/2 in socket sized nut. I have 2 sets of these in stock & both are alike. The ARP should have a footed style nut. The pioneer torque is suggested with oil. I think the ARP is with Moly. I'll have to look that up when I get to the shop. Most SPS bolts are marked on the head of the bolt.

06-29-2008, 12:46 PM	#1
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,441 Likes: 611 Liked 1,909 Times in 573 Posts	Rod Bolt Torque What is the recommended rod bolt torque spec for small block Chevy small journal OEM rods. 283 style. Aftermarket bolts... Thanks... __________________ Mike Pearson 2485 SS

06-29-2008, 01:04 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,550 Liked 1,778 Times in 404 Posts	Re: Rod Bolt Torque Which aftermarket bolts? __________________ Alan Roehrich 212A G/S

06-29-2008, 02:35 PM	#3
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,441 Likes: 611 Liked 1,909 Times in 573 Posts	Re: Rod Bolt Torque I think they are ARP bolts. As we remember the tourque was 43 ft lbs. The bolts have a dimple for a strrech gauge so they are a premium bolt. __________________ Mike Pearson 2485 SS

06-29-2008, 02:40 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,550 Liked 1,778 Times in 404 Posts	Re: Rod Bolt Torque ARP bolts will have ARP roll marked into the bolt head. __________________ Alan Roehrich 212A G/S

06-29-2008, 09:17 PM	#5
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,441 Likes: 611 Liked 1,909 Times in 573 Posts	Re: Rod Bolt Torque Thanks, I guss there not ARP bolts. Maybe MR Gasket???? Anyone know what the torque is for the factory bolts are? __________________ Mike Pearson 2485 SS

06-29-2008, 09:21 PM	#6
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,098 Likes: 1,550 Liked 1,778 Times in 404 Posts	Re: Rod Bolt Torque The factory torque is about 32 to 35. However, that will not properly load an aftermarket bolt, and will likely cause a failure. Usually SPS marks their stuff just like ARP does. I'd be VERY hard pressed to use an unknown bolt. If you don't know what they are, get a machine shop to put some ARP bolts in for you. __________________ Alan Roehrich 212A G/S

06-29-2008, 09:21 PM	#7
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Rod Bolt Torque What kind of nut do they have?... Footed or crush lock/crimped? Stock for 11/32 bolt is 35 w oil __________________ Adger Smith (Former SS) Last edited by Adger Smith; 06-29-2008 at 09:22 PM. Reason: SP

06-30-2008, 08:56 AM	#8
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,441 Likes: 611 Liked 1,909 Times in 573 Posts	Re: Rod Bolt Torque After researching a little more They are either ARP high performance rod bolts or pioneer bolts. Looks like both manufacturers recommend 40 ft lbs. The nuts are a standard thread no locknut. __________________ Mike Pearson 2485 SS

07-01-2008, 07:52 AM	#9
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Rod Bolt Torque Mike, The Pioneer for that engine use a crimp lock nut. It is crimped on 3 sides at the top of the 1/2 in socket sized nut. I have 2 sets of these in stock & both are alike. The ARP should have a footed style nut. The pioneer torque is suggested with oil. I think the ARP is with Moly. I'll have to look that up when I get to the shop. Most SPS bolts are marked on the head of the bolt. __________________ Adger Smith (Former SS)