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02-09-2017, 08:45 AM | #1 |
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Join Date: Dec 2015
Posts: 548
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8BA heads going on
About to mount the 8BA heads on the block. Planned on using copper spray gasket and rectorseal pipe compound on the head bolt threads and torquing down to 45lbs as I have seen recommended. Any better sealant choices out there for the threads?
JB |
02-09-2017, 08:52 AM | #2 |
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Join Date: Dec 2010
Location: San Antonio Texas
Posts: 636
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Re: 8BA heads going on
Permatex av works well.
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02-09-2017, 09:07 AM | #3 |
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Join Date: Nov 2011
Location: NW Arkansas
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Re: 8BA heads going on
Have always used Teflon pipe sealing compound on the threads. It doesn't set up hard and I've never had a leak.
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02-09-2017, 09:22 AM | #4 |
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Join Date: Aug 2010
Location: newark, delaware
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Re: 8BA heads going on
Teflon paste is smoother then rectorseal but both work
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02-09-2017, 09:36 AM | #5 |
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Join Date: May 2010
Location: Chester Vt
Posts: 8,861
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Re: 8BA heads going on
I use a steam pipe compound/paste. But, most of the other stuff works well. did you mill the heads for .045/.050" piston clearance??
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02-09-2017, 10:08 AM | #6 |
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Join Date: Dec 2015
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Re: 8BA heads going on
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JB |
02-09-2017, 11:31 AM | #7 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: 8BA heads going on
I think it would be a good idea for you to measure the current squish using aluminum foil balls (my choice) or clay before permanently installing the heads. It would be good to know what it is beforehand. Also, since your surfaces are fresh, I would avoid the use of any adhesive type sealers on the head gaskets. I currently use just a coating of regular grease and have had no problems with leaks. If the heads have to come of later for any reason, you'll find out why.
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02-09-2017, 02:03 PM | #8 |
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Join Date: May 2010
Posts: 2,173
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Re: 8BA heads going on
^^^^
X2! Smeared on all 4 surfaces. Jack E/NJ |
02-09-2017, 08:45 PM | #9 |
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Join Date: Dec 2015
Posts: 548
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Re: 8BA heads going on
Thanks for the aluminum ball trick. I did that just snugging up the head bolts and have 0.075 clearance with a 0.075 thick head gasket. Assuming I get a little compression on the head gasket when I torque it down to 45 lbs I might be close to 0.050. Thoughts?
JB |
02-09-2017, 09:43 PM | #10 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,320
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Re: 8BA heads going on
I find that Fel-Pro gaskets snug down to a little under .060". That'll give you .060" squish; probably close enough for a stocker. Hopefully, some of the more experienced guys will chime in with their thoughts.
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