Head bolt question

[PNK4L]

Are the head bolts on an 85 AMC 258 i6 / 4.2l torque to yield? I am wondering if I can reuse the bolts I have or should I get new ones... also where would I get new ones if I need to?

Thanks for the advice!

 

[gert]

Looks like ARP makes head bolts for the AMC 258 i6 / 4.2l , they are going to be about the best bolts you can buy, I have not heard of torque to yield until way later than 85

https://www.carid.com/1985-jeep-cj-...r-head-bolt-kit-335727428.html?parentsubmodel[]=ENGINE|AMC 258 i6 / 4.2l

https://arp-bolts.com/kits/Make.php?_Make=44&_EngModelID=*


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[Torxhead]

Yes, you do want to replace them. They have gone through a lot of heat and stress over the years. A re-check with a warm engine is a good idea also.

 

[jakeh937]

I used ARP bolts. They looked slightly different but I known the reputation of ARP.


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[Lumpy Grits]

Never-ever reuse head bolts.
LG

 

[cglax6]

Never-ever reuse head bolts.
LG

Yup...

I don't know if they're torque-to-yield, but don't re-use your head bolts. If it were me, I'd spring for a new set of ARP bolts.