Rocker Arm Bolt size and grade

**TEK310** · 12-22-2013

im gonna buy rocker arm bolts from a hardware store, instead of waiting on them to be shipped. Anyone know the size and grade of the bolt that comp cams offers?

**Sandman** · 12-22-2013

If you can't wait just get them from a parts store. If you use some hardware store bolts you're going to mess something up bad. Not to mention it's going to be a different metal than the stock bolts and so you won't have to correct torque if they would even work.

**Booba5185** · 12-22-2013

I bought some from PRJ and they're better than grade 8 supposedly. I wouldn't use hardware store bolts, but I wouldn't use part's store bolts either since they're TTY. PRJ had them to me pretty quickly, so it was worth the wait for me.

**l67ss** · 12-25-2013

Prj?

Originally Posted by Booba5185

I bought some from PRJ and they're better than grade 8 supposedly. I wouldn't use hardware store bolts, but I wouldn't use part's store bolts either since they're TTY. PRJ had them to me pretty quickly, so it was worth the wait for me.

**Booba5185** · 12-25-2013

Originally Posted by l67ss

Prj?

http://www.prjperformance.com/

**l67ss** · 12-25-2013

Kool thanks man

Originally Posted by Booba5185

http://www.prjperformance.com/

**Sandman** · 12-22-2013

At least the parts store bolts are supposed to go in the car. I'd agree on the reusable bolts to

**TEK310** · 12-22-2013

you guys are over thinking this.. a bolt is a bolt. the grade of the bolt and size are what matter. i want non-tty bolts

i will email zzp about it

**Turbocharged400sbc** · 12-25-2013

lol then all you need to do is go to ace (the only places around here that have any decent selection of bolts....)

and pick up some 5/16ths coarse thread allen head capscrews with 2" UHL iirc

**Frosty** · 01-01-2014

We will help you fix your valvetrain in a few months when you pull the threads out of the head / have a rocker arm decide to go on vacation in the middle of a wot pull.... Seriously... Their are hundreds of differnt alloys and whatnot for a reason. One alloy might do great under high shear low load applications where the next alloy might do great under high load no shear applications. There is a reason that on crazy 4g63 1000+ horsepower builds people spend hundreds if not thousands on bolts / prepping the bolt holes for the cylinder head. You wouldn't use hardware store grade 8 bolts on your cylinder head would you? My guess is they will go in / torque down fine but they will snap off from heat cycling / the crazy high vibration / tension / torsion that rockers see. Or they will snap when you go to take them out.

Edit. Something like this