Alluminum Head Bolts!!! - Team Camaro Tech
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post #1 of 3 (permalink) Old Oct 20th, 01, 12:04 PM
rogleete
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ok i just got my pair of twisted wedge heads in the mail. i tore the old motor apart, cleaned off the old gasget and chased the head bolt threads and went to put the new heads on.. i'm working on the first head, going through the 3 torque stages (32,52,70) and i'm all the way on the last stage, 70ft lbs, and 1 of the bolts at about 65-70ft just starts spinning to easy, turns out it stripped..but not the bolt, the block threads!!! what do i do..what will happen if i run the heads with the other 16 bolts torqued down to 70. will it work or will it blow a gasget. another thing, my torque wrench is made in china, so what if its setting is a little off and its really torqueing to 65 or 68 and trick flow says to final torque at 70...will it really matter? last thing, the bolts i bought had the sealer on the threads already, so am i ok as to not put any additional sealer on them, because i didn't with the one head thats on. i haven't put the other one on yet, hopefully that one doesn't strip

last thing..is there a difference between thread lock and thread sealer. thanks, oh yeah...i haven't checked yet but maybe someone knows..the twisted wedge have angle plugs and my old ones were straight, headers are hooker super comp full. anyone know if these headers will work with angle plug..i'm in a deep hole if they don't and if i can't get this one bolt fixed.
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post #2 of 3 (permalink) Old Oct 20th, 01, 02:39 PM
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Bill
 
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r, (wish you guys would include your real names)
You are going to have to remove the head and repair the threads with a "Helicoil" thread insert. It is not a difficult job, but if you have not done it before, you might want to get someone who has to help you. A head bolt is not the place to be practicing. If the motor is not in the car, your machine shop should be able to do it for you pretty quickly. It is a bit harder in the car. I would also get some more thread sealer when you reinstall the bolts. Its cheap and good insurance. Also, make sure you have washers under the bolts on aluminum heads. I have also found that most of the stock replacement head bolts (GM, Pioneer etc) are not long enough to use with washers. The ARP and Mr Gasket bolts are longer to enable the use of the washers and still get proper thread engagement in the block.
Hope this helps,
Do not run it without all of the head bolts....it will casue problems in the future.

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post #3 of 3 (permalink) Old Oct 21st, 01, 07:57 AM
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David Pozzi
 
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Use a non hardening sealer like #2 or #3 Permatex or similar.
Try your headers on the engine before putting it in the car to check the plug clearance.
You could bring the whole thing to a fab shop or muffler shop and get a bad tube or two fixed before installation.
Just be sure not to move a tube out in the steering box area.
David

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