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symptoms of lifting head?

 
Old 06-06-2004, 12:19 AM
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I run the MLS 6.0 head gaskets, got the idea from Harlan, my longblock is similar to his setup from a year ago.
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Old 06-06-2004, 04:39 AM
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thanks for the info, any idea on the thickness of the MLS gaskets?
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Old 07-22-2004, 07:17 PM
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I'd like to know too...
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Old 07-22-2004, 09:03 PM
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The rad cap is suppose to be under pressure if it isn't the cooling system won't work right. FYI the 6.0 head gasket thickness is .055 according to GM.
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Old 07-22-2004, 10:15 PM
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Just had this same problem with Cometic MLS's on my new motor.
They are off and will never touch my car again.

Also had an earlier Cometic failure after 1 year on motor.
They just don't always seal up well.

Am using GM MLS from now on.

Last edited by MelloYellow; 07-23-2004 at 02:29 AM.
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Old 07-22-2004, 10:29 PM
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When I was getting ready to do my head swap i talked to cometic and they said themselves that they were having sealing problems with there HP gaskets and were working to resolve it. So i went with the stock MLS.
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Old 07-23-2004, 02:30 AM
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Oops, sorry for saying HP (edited).

My problems were with the Cometic MLS also.
I threw my HP in the trash and they never went on either engine.

Even the Cometic non-HP series have been a nightmare for us lately.
I've never heard of a problem with the GM MLS tho.
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Old 07-23-2004, 07:55 AM
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Off topic of the lifting heads...

If you're hearing ticking up top (possibly detonation), have you tried running race gas to see if it clears up?
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Old 07-23-2004, 08:08 AM
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Originally Posted by 1dirtyZ
so what are the symptoms of a lifted head?
We've got a master's degree in lifting heads off an LS1. The first and most obvious symptom would be blowing coolant into, and out of, the collant reservoir, and perhaps finding coolant splatter in the engine compartment.
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Old 07-23-2004, 02:26 PM
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Pressurized Coolant, ie: Coolant Loss, Blowing into Coolant Reservoir, Boiling Radiator Cap, Coolant out exhaust, Popping Freeze Plugs out of your heads (fun).
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