Well, this is eye opening, I put a head on my car today. I had one box of new Fel-Pro box (10), 10 used Fel-Pro (probably) bolts, and 4 used MP bolts.
First tried, put in the new Fel-Pro bolts, 45 lb ft, 65 lb ft, 65 lb ft, and set the 90 lb ft on torque wrench and did the final 1/4 turn. 5 out of the 10 new bolts did not reach 90lb ft after the 1/4 turn.
Removed the failed ones.
Second try, put in the 5 used bolts, bolt them up to 65 lb ft, and set the 90 lb ft on torque wrench and did the final 1/4 turn. 3 bolts failed, remove those 3 bolts.
Third try, put in the 3 used bolts, bolt them up to 65 lb ft, and set the 90 lb ft on torque wrench and did the final 1/4 turn. Both failed, removed both.
Forth try, put in the 2 used bolts, bolt them up to 65 lb ft, and set the 90 lb ft on torque wrench and did the final 1/4 turn. Both failed, removed both.
Fifth try, put in the 2 MP used bolts, bolt them up to 65 lb ft, and set the 90 lb ft on torque wrench and did the final 1/4 turn. Both passed.
So,
out of 10 new Fel-Pro, 5 were bad, out of the 10 used Fel-Pro, 7 were bad, only tried the 2 of the 4 MP bolts, both were good. I used 5 new bolts Fel-Pro bolts, 3 used Fel-Pro bolts, and 2 used MP bolts on my head. I threw all the bad Fel-Pro bolts away and kept the MP bolts.
I won't be using anymore Fel-Pro head bolts from now on, you have to buy 3 bolts set just to be sure you can get 1 good set, not economical at all! Any one tried
New Cylinder Head Bolt Bolts Set Chrysler 2 2 2 5 86 Up 11mm HB135N | eBay ? They have the washers on the bolts, just like MP bolts.