PARADOX

Any body has the specs for the head bolts torques requirements?
Thx
P

Young Performance

30, 50, 65, 75 ft lbs with some Moly lube on the threads and a little oil under the head of the bolts and washers. Torque from the center out.
Eddie

FIXX

iTrader: (2)

you will need to chase the threads first with a tap,then if you run into any that are in the coolant passages those will need to be sealed or else you will end up with coolant in your oil..me,i seal all of them,you never know if one blind hole was drilled too deep and it leaks..

PARADOX

Thanks, but let me get this right. Torque all bolts to 30, first then 50. and so on, for a final torque of 75?
Thx
P

TWIN-SPINS

yes

Panther

Hi Eddie, I thought with the ARP molylube they want you to take 5 lbs off final torque?

Young Performance

I do. If I use oil on the threads instead of Moly, then I pull them down to 80. Years ago we only used oil. The problem is that when torquing in steps, the torque to get the bolt moving from say 65 ft lbs. in probably over 70. So, if you pull to 75, the bolt may barely move since the friction is so high.

Budman II

iTrader: (1)

Make sure you have a good torque wrench, preferably one that has been recently calibrated, and use NEW head bolts. Ask me how I know...

Budman II

iTrader: (1)

Paradox, not trying to be obnoxious or anything, but your questions lead me to believe that you may be kind of new to cylinder head installs. Hopefully you are using a high quality marine grade head gasket like the Cometics or the better grade of FelPro's. Just ask or do a search if you are unsure. Also, if my assumption is correct, I predict that your next post will be asking about correct rocker arm / lifter preload adjustment!

Good luck with the project. I'll be down the same path (again) shortly.

PARADOX

You are right on all counts. I'm way over my head. Well, a little way anyrate. Yes, rocker arm adjustments etc soon to come. I ordered the Cometics. Heads were redone by Champion near Daytona. Good guys. I do as much as I can, and if need to I take the boat to a pro. But for now I can wrench for a while.