BBC 396 Head Bolts that need Sealant - Team Camaro Tech
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post #1 of 6 (permalink) Old Aug 12th, 18, 05:34 PM Thread Starter
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Brett
 
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BBC 396 Head Bolts that need Sealant

I am getting ready to install head bolts. This is my question; I have ARP Assembly Lube and I have ARP Thread Sealer. Which bolts get the sealer? I know where to put the assembly lube but I'm wondering if the sealer can get mixed in with the lube on the threads. I think I need to try to get the sealant down further into the threads and not just apply it to the bolt, as that will just spread it out over the bolt and threaded hole and not actually isolate it down at the bottom of the threads and where it needs to be to seal. There is only .010-.020" of clearance between the bolt and the threaded hole and the sealer will not appear to be effective in sealing, UNLESS applying the sealer over the bolt is preferred to get it to seal along the length of the threads.

I cleaned out the threads with a cleaning tap and a barrel brush. Should I use alcohol or acetone in the threads before I apply the sealant? I think I need to insure the coolant is low enough to not allow it to come into contact with the sealant otherwise I don't think it will actually seal.

Thanks,

Brett.......

1969 SS 396 X66 - RS Conversion - TKO600 - 3.73 Posi - Paint Code 71-LeMans Blue
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post #2 of 6 (permalink) Old Aug 12th, 18, 06:04 PM
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Dave
 
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Re: BBC 396 Head Bolts that need Sealant

Because the BBC stock blocks all have head bolts that go into the coolant passage they have to be sealed. I use a paste with Teflon plastic threads all through the sealant to both lubricate the thread, and to seal against a water leak.

If you have an aftermarket block all of the head bolts are blind so you would use lubricant on the threads to obtain a good torque reading. If you have aluminum heads you also need a hardened steel washer with lubricant under the washer and more lubricant under the hex head of the bolt.

Big Dave
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post #3 of 6 (permalink) Old Aug 12th, 18, 06:25 PM Thread Starter
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Brett
 
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Re: BBC 396 Head Bolts that need Sealant

It is the stock 1966 block with stock iron heads. I have the ARP bolts with the hardened washer at the head. Stainless bolts on the outside of the head (not inside the valve cover). Any particular brand I'm looking for in the paste? Would I just google "paste with teflon plastic"?

Thanks Dave!

Brett.....

1969 SS 396 X66 - RS Conversion - TKO600 - 3.73 Posi - Paint Code 71-LeMans Blue
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post #4 of 6 (permalink) Old Aug 12th, 18, 06:34 PM
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Dave
 
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Re: BBC 396 Head Bolts that need Sealant

I use Permatex.

Did you have your cam grooved if you replaced the stock one with an aftermarket rumpity rump cam as most folks do? Without the groove you will not get any oil to the top of the motor. So despite a lot of oil pressure on your oil pressure gauge, the cam lifters, and the rocker balls/bearings are running dry.

Big Dave
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post #5 of 6 (permalink) Old Aug 12th, 18, 06:35 PM Thread Starter
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Brett
 
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Re: BBC 396 Head Bolts that need Sealant

Yes, I did. $75 upcharge. Not bad.
Brett....

1969 SS 396 X66 - RS Conversion - TKO600 - 3.73 Posi - Paint Code 71-LeMans Blue
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post #6 of 6 (permalink) Old Aug 13th, 18, 04:44 AM
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Michael
 
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Re: BBC 396 Head Bolts that need Sealant

I've used Permatex #2 on 396 headbolts for decades.

Mike

67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
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