I am having a really hard time finding a place to pick up a set of new stock head bolts. I've tried several places with no luck. Before I take the truck to the track I'd like to install some new head bolts and over tq them. I'm not really looking to go with head studs.

 

Are your bolts bad?
http://www.pureautogroup.com/shop/ne...-26-p-244.html

Good luck

 

cummins...

 

Thanks, thats what I was looking for! Mine arent bad that I know of, but I dont want to just over tq the old ones. I'd feel better starting with a new set. Just a cheap piece of mind I guess.

 

How tight are you planning on going? I would recommend not going above 140ft lbs.

 

if you're going to retorque, i'd go no higher than 125ft lbs. to be on the safe side.

 

What are they torqued to stock anyway? Isn't it 115ft lbs?

 

i forget what the old head bolt torque is but i can look it up for you later when i get home and will look in my shop manual. the new ones use a torque plus angle method in the sequence. a final torque of 89ft lbs and then an additional 90* turn. that comes out to at least 125ft lbs.

 

why not just go with head studs if your pushin 50 lbs??

 

Because I honestly dont think I need studs at just 50lbs. I have spoken with a few 12v guys running 600+hp and they swear by stock head bolts over tq'ed. So I think I shouldnt have any problems with the turbo limited to about 40psi and a little nitrous. If I decide to go to twins and push 60psi then I will look into studs, but thats further down the road... For now I wanna see what I can do with a small single turbo.

 

Oh i got ya. I'd just put the head studs in now instead of buyin new head bolts and so you wouldn't have to do it later if I was you and you wouldn't have to worry. But I guess its up to you.

 

I made 448 at the wheels with 50psi and nitrous on bolts. Torqued to 125 lb-ft. Don't need new ones, just a few extra handy in case some turn more than the rest. That means the bolt is stretching too much and needs to be replaced.

 

i wouldn't trust that the bolts would hold. i think it's just pure luck of those who haven't had issues... yet. i'd go with studs if you're over 40psi and i think everyone here would agree. but, even studs are only good to a certain pressure. if you're getting close to 60psi, o-rings are recommended.

 

I going to run these allen bolts in my 2nd gen 12v, they are in several pulling trucks that 60psi without failure. The best part they are $130 shipped.

 

have a write up or thread on those allen bolts? thats interesting.