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Ho Hum 74 Ho Hum 74 is offline
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Join Date: Jul 2003
Location: Northbrook, IL
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Red face ARP Rod bolt won't torque!

Hi guys,

Building my crank with new ARP hardware and my #1 rod was a little stiff when you started to turn it but when it got moving seemed fine. I measured the length of all the bolts and they range from 71.60 to 71.21mm BUT the #1 rod bolts were 71.40 and 72.00mm!! Soemthing didn't smell right.

I undid the nuts on #1 and re-torqued. The one side measures 71.35mm (within range) and when I went to torque the other side it just would not reach the 45 lb.ft I set on the wrench! I stopped somewhere before 45 lb.ft and now it is stretched to well over 72mm. I think it has gone through plastic deformation.

I'll call ARP in the morning but I guess I need a new bolt and nut. I was re-lubricating at each re-torque.

Oh, I'm so ready to put this thing together...now this. Sigh. Can you purchase individual bolts?

Tristan
Old 03-21-2004, 02:31 PM
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