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Well, its one thing after another
I was putting my aluminum heads back on tonight and a pulled the threads out of the block with a head bolt. I have already done a search and found that its ok to heli coil it. Thats not my question though, I want to know if I can still use the gasket. Its a felpro 1003, I was on my 50lb/ft pass over the bolts. I go 30,50,60,65. I since I didnt run the motor should I be able to still use the gasket? That is, after I pull the head and heli coil the block. Im not going to sleep well tonight thats for sure.
 

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Most would tell you that once the head gasket is compressed, it should be replaced. If you were only on the 2nd pass of torquing them and no engine heat has been applied, its probably ok to reuse them. I had a similar situation while using the FelPro Locwire gaskets. These babies cost $80 EACH, and I ended up replacing them to be safe.OUCH! Call your machinist and ask his advice. The worst you'd need to do is replace the one gasket.
 

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n20,
Is it worth taking a chance for the $20 or so that the gasket costs ? The one thing I would do is have your torque wrench checked to make sure it is ok. Its kind of rare, but I have seen them go out of calibration. It would be worth at least borrowing another one from a friend to compare with. By the way, most people dont realize it, but torque wrenches are most accurate near the middle of thier range. If you are torquing head bolts you should be using a torque wrench with about 150lb capacity.
 

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We have had customers over the years that have done this Manley performance makes a makes a drill and tap fixture for doing heli coils in the decks works great P/N 40188 its important to get the heli coil in straight and the Felpro gaskets are a preflatten gasket and not being at full torque that should be fine and over the years we have found that using some head bolts over again seems to be the problem according to ARP sometimes they are streched any of the performance engines that come in for rebuilds we change out the head bolts evertime unless they are 12 point bolts form ARP its the 134-3406 head bolts we change.
 

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I would have that torque wrench checked for sure, shouldn't have pulled the threads at 50, no way.

I inherited a snap-on "clicker" wrench. Loaned it to a neighbor before I ever had a chance to use it, he stripped a head bolt hole in his tractor! I will now never use it. The old Craftsman beam wrench is just too simple to ever be a problem!
 

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FWIW, the one headbolt hole's threads I pulled was rusted really bad!!

Just H-C'ed it and everything was fine! Heck even used the same composite headgasket over.

pdq67
 
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