Heard loud crack on first torque of heads with GM bolts
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Heard loud crack on first torque of heads with GM bolts
I have read a bunch of threads on this but most people have had it on the final torque. I was on the first pass to 22 ftlbs and I heard a loud pop. I am pretty sure I had everything out of the threads but even if there was some coolant or something in there I wouldn't think on the first pass it could have cracked the block on that little of torque or am I wrong. Everything torqued down to the final sequence without any other issues. Am I wrong to think on the first pass it could not have damaged the block.
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I am gonna pull the bolt out later today and see what it looks like and stick the boroscope down the hole and hope for the best. Now if it did crack on the first pass would it still be hard to torque to both 90 degree passes. I would think it either wouldn't or be very easy
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I used a blower nozzle stuck down in the bolt holes as far as I could reach to blow out most of the coolant. An old bolt turned into a thread chaser to clean out the old gunk in the threads works well. Then I stuck a mcdonalds straw into the bolt holes and used a shop vac with a crack/crevis tool attacked to suck out all the remaining crap through the straw. After initially breaking the stock bolts loose I never heard another crack or noise on the removal or install. I used ARP bolts with thier lube applied to the threads and washers/bolt heads like the instructions suggested. I hope you didnt ruin your block. G.L. and let us know how it works out.
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Pull the bolt out and look at the thread. if theres moisture on it then you still have some in the bolt hole.
Take blue shop towels and rip a strand about the width of your thumb. Fold that in half and twist is up tight like you are trying to ring it out. then put that in the holes and see if it pulls out more moisture. If its clean and dry you are good. If theres moisture repeat until its dry.
I pulled one of my heads back off because there was still moisture in there even after using compressed air and a shop vac. Took hours to do, but at least its done right.
Take blue shop towels and rip a strand about the width of your thumb. Fold that in half and twist is up tight like you are trying to ring it out. then put that in the holes and see if it pulls out more moisture. If its clean and dry you are good. If theres moisture repeat until its dry.
I pulled one of my heads back off because there was still moisture in there even after using compressed air and a shop vac. Took hours to do, but at least its done right.
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I didn't feel anything out of the ordinary bolting it down then the noise. I will yank the head off when I get home and see. If it is I guess a 6.0 is going in sooner then later. I got a line on a lq9 for 850 complete so I could sell the heads off of that and get a little cash back
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Head bolt hole probs
I didn't feel anything out of the ordinary bolting it down then the noise. I will yank the head off when I get home and see. If it is I guess a 6.0 is going in sooner then later. I got a line on a lq9 for 850 complete so I could sell the heads off of that and get a little cash back
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Well I got the head off and it blew out the bottom of the hole in the crank case I can put the rubber tipped blow gun on it and I hear it in the motor. I am gonna drop the pan and see what I find next and go from there. If that's all it is I may just run it and see what happens