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Head Gaskets and sealer |
Post Reply | Page 123 4> |
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70AMX401
AMC Apprentice Joined: May/22/2009 Location: Burlington Status: Offline Points: 239 |
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Posted: Mar/05/2011 at 4:08pm |
I'm about to put my heads back on. I'm cleaning up the block and head surfaces with lacquer thinner. I'm noticing black silicone around the coolant ports on the block. I've only done a couple of engines in the past and they were SBC. We never used sealant with head gaskets. It looks like the previous builder did on this? Is this common? If so what would you use, this looks like plain old permatex #2. Sucks thought I'd have it buttoned up today until I noticed this and it threw me for a loop. Engine is 11.2:1 401, iron heads, felpro Permatorques. |
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70 AMX 401/727
66 Rambler Classic 770 |
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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Clean surfaces thoroughly amd use the gaskets only with proper torque sequence.
SKeown
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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A AMC engine is not a SBC so, don't even compare them. I use a spray copper coat (KW COPPER COAT GASKET COMPOUND)on both sides of the head gasket and I do not use any silicone anywhere. Torque the head bolts in the sequence that the TSM tells you. Wait over night and check the torque the next day. I have never had a problem with this method.
Now, if you are talking about installing the intake manifold I use a little different procedure. |
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70AMX401
AMC Apprentice Joined: May/22/2009 Location: Burlington Status: Offline Points: 239 |
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Would you consider the spray on copper that permatex has as an equivalent? I know I can pick that up tomorrow morning. I know if sounded like a dumb question but when I seen the black silicone around those water ports it threw me off.
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70 AMX 401/727
66 Rambler Classic 770 |
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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Yes I think that the copper Permatex is the same type of stuff.
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5752 |
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X2 on the spray or brush sealer on the steel side minimum...
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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jayson738
AMC Apprentice Joined: Jun/06/2009 Location: Coloma, MI Status: Offline Points: 120 |
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I haven't built as many engines as most but my rule of thrumb is clean heads and block and install the gaskets with no chemicals. They don't at the factory so why start now.
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JavelinRob
Supporter of TheAMCForum Joined: Nov/08/2010 Location: Toronto Canada Status: Offline Points: 400 |
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yes just clean surfaces thats all I have ever done and no leaks , the only place I use a little silicone is the corners of the oil pan gasket where it meets the rubber seals , then intake manifold corners where it meets the head and block , thats why you have gaskets !!!!!!!!!
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1970 sst 421 shivvy
1970 amx 390 4spd go pack |
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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That's exactly correct. unless you're using metal shim gaskets on a rough machined surface, ther's absolutely no need for copper coat. I recommend ROL gaskets in the first place, you can use less bolt torque which creates less bore distortion.
SKeown Edited by SKeown - Mar/06/2011 at 2:44pm |
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Peter Marano
Supporter of TheAMCForum Joined: Jul/01/2007 Location: Kenosha WI Status: Offline Points: 1650 |
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The factory coated head gaskets with sealer, both sides.
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