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iTrader: (12)

With aftermarket "milled" heads, which head bolts are better? I know ARP is supposed to be better by popularity, etc. The GM bolts are about $100 cheaper. Are the ARP's stronger, hold more torque? Or are the GM's just as good? Any quick answers are appreciated because I need to order one or the other today. (Also, some NHRA classes disqualify you for using aftermarket head bolts; I've heard of this happening!)

bsf

iTrader: (7)

I was under the impression ARP's are reusable.

erikthegoalie

iTrader: (29)

I bought ARP head bolts b/c they are not only stronger (by a long shot) but you can reuse them!

GM bolts are cheaper for sure, but if you ever swap anything more than once you might as well have spent the $ on the ARP's as they are TTY style and cannot be reused once stretched

They will pay for themselves

YellowToy/A

iTrader: (1)

Also with the GM u have to do torque plus angle. When I do it I will get ARP studs not bolts. and use the ARP lube.

1badjimmy

iTrader: (4)

I think that you left out the ARP Head Studs. But maybe you will need to remove the heads while the engine is still in the vehicle. I cannot remove my heads with the engine in my Jimmy, so I am gonna use studs (added insurance). I voted the ARP's.

brad8266

iTrader: (23)

ARP head studs FTW!!!!!!!

marv

iTrader: (40)

Same here. I voted ARP bolts, but would rather use studs, which is what I put in mine.

Not only are they reuseable, but they also keep you from having to clean the bolt holes again if you ever change to another set of heads.

Food for thought....

brad8266

iTrader: (23)

yeah the best part is not having to clean the bolt holes when you pull the heads since you run the risk of missing something in the hole and cracking the block.

ClifZ28

You can't go wrong with ARP's.

00BlackSS

iTrader: (7)

u cant reuse arp head bolts, u can reuse arp head studs!!!!


id go arp head studs if i was you spend the extra bucks and be done with it

sonicbaloo

iTrader: (2)

Studs is the way to go...but if I had to choose I guess ARP blots before GMs.

Chad

Xtnct00WS6

iTrader: (8)

ARP Bolts for sure! Properly installing the GM torque to yield bolts would be a pain. The ARP bolt head is slightly smaller too so it'll come out and go back in much easier. The reason I say this is cause on my car, there was a slight clearance issue with getting one of the bolts out. Getting a GM bolt back in would have been a pain.

ringram

+1 studs

Cop Car

iTrader: (14)

APR studs or GM head bolts. oh yea, and when you do your head swap, just pull the whole motor, so many people have broken head bolts or messed stuff up trying to do it in car.

i removed my motor out the bottom and it was fairly easy. i am however going to attempt a head swap in car becuase i already have ARP head studs

marv

iTrader: (40)

Eh, just swap them in the car. It's not that bad.

00BlackSS

iTrader: (7)

x2, i did mine twice, in the car, and it was not bad at all, only thing i wish, i woul d have used arp studs the first time!!!

mr2guru

iTrader: (16)

Where did you hear that? They aren't TTY.

Cop Car

iTrader: (14)

im tired of hearing TTY all the time... GM head bolts are not TTY, TTY means that you torque something down and it breaks off and thats the torque specs. they use TTY bolts on sky scrapers.

the reason why the GM bolts are degreed is becuase its much more acurate than torquing. not becuase they are "TTY"

brad8266

iTrader: (23)

Wrong they are Torque To Yield

http://www.canadiandriver.com/articles/jk/040303.htm
http://www.xmission.com/~kd7olf/torque.html
http://www.robbos.com.au/myweb/Tech_Bolts.htm

mr2guru

iTrader: (16)

What is the torque to yield tightening method?

Torque to yield is the method of tightening a fastener so that a high preload is achieved by tightening up the yield point of the fastener material. To do this consistently requires special equipment that monitors the tightening process. Basically, as the tightening is being completed the equipment monitors the torque verses angle of rotation of the fastener. When it deviates from a specified gradient by a certain amount the tool stops the tightening process. The deviation from a specified gradient indicates that the fastener material as yielded.

The torque to yield method is sometimes called yield controlled tightening or joint controlled tightening.