Re-using head studs, which ones can be?

[Big Bore]

If a guy wants to use studs on an existing motor and is building another motor and wants to reuse the studs in the new motor, is there a stud that is better for, and/or is there a stud that is not recommended, doing this with?

 

[jwlandry]

H-11s are reusable.

 

[ZacPSD60]

H-11s are reusable.

:whs:

 

[Dieselboy.]

So are ARPs

 

[ZacPSD60]

So are ARPs

The ARP's stretch too much during normal wear and tear to take them out and put them in a different motor. The H11's are a lot stronger and can handle more torque downs.

 

[Arisley]

Not only that, but after the first use, H11's have no need for a hot retorque. My studs had been used on one motor. Installed them on mine, I retorqued all of the ones outside the valve covers. Not one of them moved even a little bit. Did not bother pulling the valve covers to check the ones under there.

 

[V-Ref]

So are ARPs

If yield strength hasn't been exceeded, I agree.

Not only that, but after the first use, H11's have no need for a hot retorque. My studs had been used on one motor. Installed them on mine, I retorqued all of the ones outside the valve covers. Not one of them moved even a little bit. Did not bother pulling the valve covers to check the ones under there.

What does the brand/stud material composition have to do with ensuring an even clamping force being applied to the entire head gasket surface after several heat cycles?

 

[Dieselboy.]

I know of guys re-using both. ARPs are not a one time use. Like V-ref said as long as their yeild strength hasnt been exceeded. For BOTH brands of studs.

I was under the impression that the H-11s where the ones that required the hot re-torque not ARPs

Yes both should be checked, but H11s are required are they not ?

 

[powerstrokenstang]

I reused a set of arps 4 times before. H-11 require retorque w fire rings dont think they do w plain gaskets.

 

[Big Bore]

I reused a set of arps 4 times before. H-11 require retorque w fire rings dont think they do w plain gaskets.

Thanks, thats good info.

 

[CSIPSD]

My ARP's are on there second use.

 

[Big Bore]

If yield strength hasn't been exceeded, I agree.





What does the brand/stud material composition have to do with ensuring an even clamping force being applied to the entire head gasket surface after several heat cycles?

Has anyone ever measured ARP's before and after being torqued? Since torquing basically reproduces tensile strength tests. Also does anyone know the yield strength numbers for ARP's?