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Looking to buy a new rod bolt stretch gauge.

What's a good one?

Been looking at the two offerings from ARP, kinda like the more expensive of the two due to it being made of steel and not aluminum. Should be good for more consistent measurements I would think.

Thoughts?
 

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I've used the billet one, and glad I did, using it and the torque wrench I was able to find I had a new L-19 rod bolt that did not require near the torque to meet the required stretch as the others did. That could have been an expensive repair if I was just using the torque wrench and left it. I plan to get one for myself for the next engine

Mike
 

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I have one i got from eagle cranks/ rods years ago. I don't use their stuff but the gauge they sold was real nice. saw it at PRI and got one. Its steel and dosen't seem to move at all from temp change ( within reason) like during the summer. not sure who makes it or if they still sell it.

edit, looks like the number is still good but they changed it to a much more bulky less adjustable aluminum part. it was a EAG 5010 part number, same number , different part. looks like I'm no help ha ha ha. lets see if this pic works,

 

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looks like that worked, here are 2 more



hope that helps
 

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i got one just like that....love it......

Hard to find the steel ones though......unless someone knows where

i haven't really looked ............
 

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BHJ is a good one.

If money isn't as important as your rod bolts, this one is hard to beat. Titanium body, reading to .00005, and a price tag around $1300!



I think any ones of sturdy construction are fine, but it is best to get a gage that reads in tenths for proper measuring, and to maximize the clamp load of the fastener.
Another tip, is that most rod bolts don't have a proper dimple in the head for consistent readings. I suggest chucking them in a lathe collet, and increasing the dimple with a center drill.
 

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So how do you properly use the stretch gauge?

How do you know how much to tighten the rod bolt before you check it with the stretch gauge?
 

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I think you are supposed to torqe them with the guage on the bolt, but I'm not sure. I bought the proform guage, it is alluminum and doesn't have a spring on it at all. They must think that the spring inside the indicator was going to be strong enough, but it's not.
 
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