Quote Originally Posted by 65cayne
Thanks for the quick reply.

does that then necessitate the purchase of new rockers and new pushrods?

I dont think he is going to want to rebuild the heads because the motor is fairly new and it ran great up until the failure. He is also squeezed for cash and I (his main helper) am squeezed for time although you make that sound pretty easy. Any idea what it might run to have a machine shop replace the one stud versus replacing them all with adjustable type studs?

You can use the same rockers and push rods.

By the time you pull the head to take to a machine shop, you have a fair amount of time and money spent. The machine shop will have to either drill or (hopefully) EDM the failed stud out. That takes care of one fatigued stud - but there is the potential of 15 more following. Studs are not one of those items that ever get replaced until someone wants to either build a performance engine or one breaks. If he has an aftermarket performance cam, it is even more important to change these studs. Once the heads are off, the job is easy - with removing the broken piece being the hardest part. Pull the rockers off the existing studs, keeping them in the same order as removed for later reassembly, the valves can stay in-place. Take the heads to a machine shop, and have them tap the holes for the screw ins - the hole is the correct size for 7/16-14. Bring the heads home, screw in the studs with some LockTite, and put the engine back together. Two days - your time, 1 day a machine shop time is a reasonable, unhurried schedule to work towards - faster by abouy 50% if you're in a real rush. Parts costs - ~$125(studs and a GOOD Fel-Pro valve grind gasket set), machine shop - who knows??