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Cometic HG Dry or Coated?

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Old Sep 18, 2014 | 07:10 AM
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Default Cometic HG Dry or Coated?
So i have read some recommend coating the Cometic HG's with copper spray to help seal and i heard install them dry which is the best route?
New lsx block and Mast heads that is boosted if that matters!
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Old Sep 18, 2014 | 08:18 AM
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I'm pretty sure Cometic recommends installing them dry.
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Old Sep 18, 2014 | 09:17 AM
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I always use permetex hitack. I will never install a set without it.
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Old Sep 18, 2014 | 10:09 AM
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They say dry, but I put copper spray on mine because I didn't have a machined deck on my stock shortblock. No coolant leaks from mine.
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Old Sep 21, 2014 | 05:29 PM
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So when you guys spray them do you drill out the rivets and spray between layers or just the top and bottom?
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Old Sep 21, 2014 | 08:06 PM
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Cometic says use nothing and I have used half a dozen sets of them installed dry with zero issues.
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Old Sep 21, 2014 | 10:12 PM
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It seems like a 50/50 deal as far as coating goes!
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Old Sep 22, 2014 | 09:20 AM
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Originally Posted by 6togo
So when you guys spray them do you drill out the rivets and spray between layers or just the top and bottom?
Nope just the sides that contact teh block and heads.
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