Hyper_Harvest_II
Guest
Yes, the head gasket has been updated several times. I would have the head checked by a qualified machine shop for flatness and have plained if necessary. As for the head bolts there is a gauge that comes with the head set to check head bolt length. If they meet the length requirement then they should be OK to use again. Another thing to look at is the top of the head bolt markings. It should have a 12.9 stamped for hardness. Below that should be a T+ -)90 which meens it needs to be tightened in a five step process. Which means step (1)all 26 bolts torqued in numbered sequence to 52 ft.-lbs. Then step (2) torque only the long bolts (1,2,7,8,9,10,15,16,17,18,23,24,25,26)in numbered sequence to 105 ft-lbs. Then step (3)retorque short capscrews (3,4,5,6,11,12,13,14,19,20,21,22) in numbered sequence to 52 ft-lbs. Then step (4) retorque the long capsrews (1,2,7,8,9,10,15,16,17,18,23,24,25,26)in numbered sequence to 105 ft.-lbs. Then the last step (5) is turn all the head bolts in numbered sequence 90 degrees from their original position. You can do this by finding the dot on top of the head bolt and making a mark on the cylinder head, then if you look at the marking behind 90 on head bolt you will see a window mark. Once you have marked your cylinder head with dot orientation then rotate head bolt until window on head bolt lines up with mark you made on cylinder head. You could also use a torque angle gauge which shows you how many degrees you have moved. Make sure and clean all the head bolts and cylinder head mating surfaces realy well. If you have a service manual or can borrow one it would be helpful.Good luck and ask if you have further questions. Hyper Harvest II