Thread: ARP rod bolts

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What are you measuring them with? I had the same ? when I built the latest engine. I used the cap screw type and their relaxed were spread out as well.
I was told to 1) measure relaxed anyway, note reading 2) stretch to .0063
3) take em off and measure again with the same dial, note reading. If it has increased by more than .001", round file. IMO- these bolts out of the box will vary in their length, that is why ARP has you measure and write down their length so you can compare if you ever do a tear down/rebuild.

That's what I think , I doubt they can produce them the exact same length, they are cap screws measuring with stretch gauge .had to put 68 lbs on the longest one to get .005 stretch .

68lb sounds about right for .005". If you reference the directions that came with the bolts, ARP says that .0063 stretch with moly lube should fall somewhere around the 75 lb area.