gonna be installing new manifold gaskets on my zz4 this weekend anyone know what the torque is for the bolts with aluminum heads? gonna be using arp manifold bolts also if that makes a difference.

thanks

 

3/8" bolts are usually about 35 ftlbs. Since it's aluminum, and just holding down the intake manifold, 25-30ft lbs should work fine.

 

I've torqued too many 3/8" bolts to worry about using a torque wrench any more. 35-42 pounds is fine. Start with the 4 center bolts (if the manifold has any) and snug them up. Then do the front 4, then the rear 4. Go around and do them all again and double check a third time. By then they should all have an equal torque.

As mentioned above, they don't need a huge amount of clamping force. All they're doing is sealing the intake gaskets. You don't want to crush the gasket from over torquing.

 

sounds good. also im looking at the arp intake bolts and noticed 4 out of the 12 washers are thiner then the rest any clue where they are supposed to go or it makes not difference?

 

Strange. Which bolt set did you buy? You remember the part number?
Shouldn't matter, I doubt the thickness difference is enough to make a difference.

 

http://www.jegs.com/i/ARP/070/434-2001/10002/-1

 

oohhhh! 4/12 washers have a smaller OD ! Not "thinner" right?

Yea, you'll know when you go to install them I thought it was the inner 4 bolts, there is very little room, and a full size SAE washer wouldn't fit. I think I used AN washers on mine.... (AN washers have a much smaller OD compared to an SAE washer, which is smaller than a USS washer, which is smaller than a "fender washer").

 

thanks.

yeah you can see in the pic of the part number i put 4 are different. i never dealt with that.

the stock bolts are on there now and there's no washers that's whay i figured it would be hard to figure out where they went.