Cometic HG Dry or Coated?

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09-18-2014, 07:10 AM

6togo

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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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09-18-2014, 08:18 AM

KCS

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I'm pretty sure Cometic recommends installing them dry.

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09-18-2014, 09:17 AM

allblowdup

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I always use permetex hitack. I will never install a set without it.

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09-18-2014, 10:09 AM

JakeFusion

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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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09-21-2014, 05:29 PM

6togo

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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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09-21-2014, 08:06 PM

John B

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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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09-21-2014, 10:12 PM

6togo

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It seems like a 50/50 deal as far as coating goes!

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Cometic HG Dry or Coated?

Cometic HG Dry or Coated?

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