Reusing Cometics
#1158491
01/16/12 10:35 AM
01/16/12 10:35 AM
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Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
WadeMetzinger
OP
top fuel
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OP
top fuel
Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
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If your going to reuse Cometics, should you resurface your aluminum heads or is that not necessary?
Anyone had issue trying to reuse Cometics?
I don't feel any grooves or indention in the heads caused from the Cometics so I guess it just flatens out the raised sealing rings on the Cometics (I was mistakingly thinking it would leave grooves in the heads like when you O-ring the block).
I've got both of my motors apart (Abbey's and mine), her Cometics are new from last year. Mine are about 3 years old.
Not sure I really want to take a chance but considering it so I wanted to get some opinions from you guys.
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
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Re: Reusing Cometics
[Re: Big Squeeze]
#1158493
01/16/12 11:23 AM
01/16/12 11:23 AM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Quote:
Just clean the gaskets and heads and bolt it back together......  
 and make sure they go back on with the same orientation that they came off. I'm on my 3rd reuse. No spray copper or any sealers, just bolted on 
I like the ability reuse gaskets and that's why I chose the materials that I use to make my gaskets with 
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Re: Reusing Cometics
[Re: Irun5snd8th]
#1158495
01/16/12 01:26 PM
01/16/12 01:26 PM
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Joined: Aug 2008
Posts: 4,066
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,066
Mo.
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Quote:
I spray mine with copper but I have reused a set 4 times at over 12:1 compression on alcohol
y the copper spray just curious? 
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Re: Reusing Cometics
[Re: WadeMetzinger]
#1158496
01/16/12 01:43 PM
01/16/12 01:43 PM
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Joined: Aug 2006
Posts: 290
Cincinnati, Ohio
d7cook
enthusiast
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enthusiast
Joined: Aug 2006
Posts: 290
Cincinnati, Ohio
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I reuse them 3 times. Clean the block/heads and the surface of the gasket. Some people drill out the rivets and clean between the individual gaskets but I do not. I wipe them down with thinner which removes what's left of the factory rubber coating, then give them a light spray with copper gasket sealer to seal the water passages and back on they go.
1967 Coronet, 1989 Daytona tube chassis.
Former cars, 66 Charger, 67 R/T, 69 Coronet, 67 Dart GT.
-Banned for life from V8Buick.com-
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Re: Reusing Cometics
[Re: Big Squeeze]
#1158497
01/16/12 02:39 PM
01/16/12 02:39 PM
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Joined: Nov 2010
Posts: 914
tn
robnbird
super stock
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super stock
Joined: Nov 2010
Posts: 914
tn
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Quote:
Just clean the gaskets and heads and bolt it back together......
 do not  use a cleaner like carburetor cleaner to clean the gasket. most gaskets have a very thin layer of silicon on the outer surface of the gaskets and some cleaners will wrinkle the sealer.
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Re: Reusing Cometics
[Re: WadeMetzinger]
#1158499
01/16/12 03:36 PM
01/16/12 03:36 PM
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Joined: Jan 2003
Posts: 1,605
westerly, ri. usa
440lebaron
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,605
westerly, ri. usa
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hello,
anyone want to buy a set for .060 over 440 .049 thick, i will not reused them.
pm me
gary
all parts are sold as is, all parts are considered used no warranties or returns
paypal/check/money order, shipping is from zip 02891, buyer pays paypal fees 24% IRS 1099A plus 3% of part price, check/money order preferred
site is not monitored 24/7 there might be a delay in response
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Re: Reusing Cometics
[Re: 440lebaron]
#1158500
01/16/12 04:35 PM
01/16/12 04:35 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Quote:
hello,
anyone want to buy a set for .060 over 440 .049 thick, i will not reused them.
pm me
gary
Sure......do "your" heads and block come with them
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Re: Reusing Cometics
[Re: roadhazard]
#1158501
01/16/12 05:37 PM
01/16/12 05:37 PM
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Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota
super stock
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super stock
Joined: Dec 2009
Posts: 1,074
detroit, mi
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Quote:
Quote:
Just clean the gaskets and heads and bolt it back together......
and make sure they go back on with the same orientation that they came off. I'm on my 3rd reuse. No spray copper or any sealers, just bolted on
I like the ability reuse gaskets and that's why I chose the materials that I use to make my gaskets with
You make head gaskets?
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Re: Reusing Cometics
[Re: POS Dakota]
#1158503
01/16/12 06:20 PM
01/16/12 06:20 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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Quote:
Quote:
Quote:
Just clean the gaskets and heads and bolt it back together......
and make sure they go back on with the same orientation that they came off. I'm on my 3rd reuse. No spray copper or any sealers, just bolted on
I like the ability reuse gaskets and that's why I chose the materials that I use to make my gaskets with
You make head gaskets?
No Sir,
Just the soft gaskets like valve cover, intake, oil pan, timing cover, etc, etc. 
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Re: Reusing Cometics
[Re: Irun5snd8th]
#1158504
01/17/12 12:10 PM
01/17/12 12:10 PM
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Joined: Aug 2008
Posts: 4,066
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,066
Mo.
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Quote:
Quote:
Quote:
I spray mine with copper but I have reused a set 4 times at over 12:1 compression on alcohol
y the copper spray just curious?
My deck surface does not meet the smoothness criteria for the gasket. If I dont use the copper they seep water to the outside. That and I wouldnt chance it anyway. Too much trouble to take back apart to save myself 5 minutes of spraying.
I understand now Thax.......
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Re: Reusing Cometics
[Re: racerx]
#1158505
01/17/12 02:23 PM
01/17/12 02:23 PM
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Joined: Jul 2005
Posts: 1,301
Penna
70satelliteguy
pro stock
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pro stock
Joined: Jul 2005
Posts: 1,301
Penna
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Just to let everyone know, I usually use my Cometics several times without issues,spraying them with coppercoat just as insurance. This year after 3 uses I decided to replace them just as a regular part of my refreshening my motor. I ordered the Mr. Gasket ones which are supposed to be just repackaged Cometics. The packaging specifically say's to "NOT COAT the gaskets,just clean and bolt on. I decided that I was gona spray them anyway cuz I always do!!! I don't know if they just changed things or what but the surface of the gaskets are now kind of shiny and will not accept a spray of coppercoat.  After drying it easily comes off even with gentle handling!(I did clean them first) So I installed them with out any coppercoat this year for the first time and will keep my fingers crossed and hope for the best. Mike
Last edited by 70satelliteguy; 01/17/12 02:25 PM.
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Re: Reusing Cometics
[Re: 70satelliteguy]
#1158506
01/17/12 03:00 PM
01/17/12 03:00 PM
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Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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The Cometics also say not to use any coating/spray on them, but myself and everyone I know spray them w/ coppercoat.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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