Eagle rod bolts

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11-21-2007, 11:16 PM

marshall93z

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Eagle rod bolts

These Eagle rod bolts also say ARP on them. Are they ARP bolts with just Eagle's name on them, also, or what? I, for the life of me, can NOT figure out what the hell to torque these things too! mad:

Eagle ARP 1.5 8740 is what's wrote on the head. 3/8 capscrew.

Thanks for any help!

11-22-2007, 01:00 AM

mdacton

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rod bolts? if they are 7/16 cap screws the tq is 70# with arp lube

What kind of rod is it? eagle does not a use a 3/8 cap scew that I know of

11-22-2007, 08:22 AM

marshall93z

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Quote:

Originally Posted by mdacton

rod bolts? if they are 7/16 cap screws the tq is 70# with arp lube

What kind of rod is it? eagle does not a use a 3/8 cap scew that I know of

Quote:

Originally Posted by marshall93z

Eagle ARP 1.5 8740 is what's wrote on the head. 3/8 capscrew.

3/8

11-22-2007, 10:27 AM

FASTFATBOY

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63 ft lbs

The 8740 is listed as a 7/16 head capscrew

David

11-22-2007, 04:09 PM

mdacton

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Quote:

Originally Posted by marshall93z

3/8

I never seen one that small everyone I have ever seen was a 7/16" thats why I asked if it was a sir or esp

11-22-2007, 05:11 PM

marshall93z

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The head is 7/16, but the threads measure 3/8.

11-22-2007, 05:48 PM

mdacton

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Quote:

Originally Posted by marshall93z

The head is 7/16, but the threads measure 3/8.

oh I see......like fatboy said 63 is the spec that comes in the pack....lube the threads and under the head, I do them in 2 steps....

11-22-2007, 05:57 PM

marshall93z

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What makes them a 7/16"?

11-22-2007, 06:27 PM

FASTFATBOY

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Quote:

Originally Posted by marshall93z

What makes them a 7/16"?

The size socket you use to torque them=7/16

David

11-22-2007, 06:28 PM

#10

marshall93z

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Really? Then I bet the 3/8" capscrews are TINY!

11-23-2007, 01:42 AM

#11

1racerdude

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Connecting Rod Manufacturer: Eagle
Cap Retention Style: Cap screw
Rod Bolt Head Style: E
Rod Bolt Nut Style: 12-point
Fastener Yield Strength (psi): 200,000 psi
Thread Size: 3/8 in.
Connecting Rod Bolt Diameter: 3/8 in.
Connecting Rod Bolt Material: 8740chromemoly steel
Underhead Length (in): 1.500 in.
Nuts Included: No
Quantity: Sold individually.
Notes: Fits Eagle Specialty Products rods, H beam style only.

Rod Bolts, 8740, 12-Point Cap Screw Type, 3/8 in. Diameter, 1.500 in. UHL, Each

---------------------------------------------
Connecting Rod Manufacturer: Eagle
Cap Retention Style: Cap screw
Rod Bolt Head Style: E
Rod Bolt Nut Style: 12-point
Fastener Yield Strength (psi): 200,000 psi
Thread Size: 7/16 in.
Connecting Rod Bolt Diameter: 7/16 in.
Connecting Rod Bolt Material: 8740chromemoly steel
Underhead Length (in): 1.600 in.
Nuts Included: No
Quantity: Sold as a set of 16.
Notes: Fits Eagle Specialty Products rods, H-beam style only.

Connecting Rod Bolts, Eagle H-Beam Rod Bolt Replacements, 8740 Chromemoly Steel, Chevy/Dodge/Ford, Set of 16

The 8740 is listed in both 3/8 and 7/16.

11-23-2007, 08:30 AM

#12

marshall93z

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So, if my threads measure 3/8", then I have a 3/8"? And if so, what is the torque on them?

They don't only fit H-beams, as stated above. Mine are I-beams and they have them.

11-23-2007, 09:21 AM

#13

1racerdude

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The stretch is .0063.
The torque with ARP lube is 50#
http://video.arp-bolts.com/catalog/ARPCatalog.pdf

Good luck with it.

11-23-2007, 10:26 AM

#14

marshall93z

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Using the two exaples you listed above, stating "200,000 psi", page 24 of the catalog you posted says 44/ft.lbs with ARP lube and 57/ft.lbs with 30 weight oil for a 3/8-24 fastener.

Quote:

Originally Posted by ARP

Thread/ 30wt oil/arp lube/preload

3/8-24/ [50 39 10,512] [57 44 11,826 ] [63 49 13,140]

....[170,000/180,000 psi] [190,000/200,000 psi] [200,000 psi]

11-23-2007, 10:51 AM

#15

1racerdude

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The discussion was about 8740 bolts

7/16˝ “K” rod with 12 pt nuts A 134-6004
265-283-327 cid (small journal) 11/32˝ D 134-6001 134-6021 134-6401 134-6411 234-6401 234-6421
305-307-327-350 cid (large journal) 3/8˝ B 134-6003 134-6023 134-6403 134-6423 234-6403 234-6423
350 cid PM Rod (1992-97) LT1/LT4 B 134-6005
383 Stroker w/ 350 rod (extra head clearance) A 134-6027
400 cid A 134-6002 134-6022 134-6402 134-6422 234-6402 234-6422
Gen III/LS Series small block (except LS7)
“Cracked Cap Design” E 134-6006 134-6026 234

Go to page 30 and find your bolts:
134-6003
134-6005
134-6027
Possibilities I picked.

Then go to page 25 for torque.

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