grocery_getter
Well-known member
Just as an FYI.
Found out a new ARP rod bolt failed out of the box. It is part of a set that comes with Eagle rods. The rods are brand new taken out of the box. Eagle/ARP Spec calls for 43 ftlbs or .0055" - .0059" stretch. At only 40 ftlbs this one stretches out close to .0070" WOW - FAILED!. All the other 7 rod bolts are good needing anywhere from 45-48 ftlbs of torque to reached the required stretch. Same installer, same temperature and same torque wrench.
In my experience, at the specified 43 ftlbs with generous application of the supplied ARP lubricant at the threads and on the bottom side of the bolt head, all of them normally stretch just barely a hair under .0050" - not enough stretch!!
I've been stretching rod bolts for the past 5-6 years and just now caught this one! Check your rod bolt!
Found out a new ARP rod bolt failed out of the box. It is part of a set that comes with Eagle rods. The rods are brand new taken out of the box. Eagle/ARP Spec calls for 43 ftlbs or .0055" - .0059" stretch. At only 40 ftlbs this one stretches out close to .0070" WOW - FAILED!. All the other 7 rod bolts are good needing anywhere from 45-48 ftlbs of torque to reached the required stretch. Same installer, same temperature and same torque wrench.
In my experience, at the specified 43 ftlbs with generous application of the supplied ARP lubricant at the threads and on the bottom side of the bolt head, all of them normally stretch just barely a hair under .0050" - not enough stretch!!
I've been stretching rod bolts for the past 5-6 years and just now caught this one! Check your rod bolt!
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