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witch gasket on lq9 heads ?

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Old 01-18-2009, 09:23 PM
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Default witch gasket on lq9 heads ?
i am going to install lq9 heads on a ls1 block and i have 2 mls head gaskets part #12589226 . i have placed them over the combustion chamber on the lq9 heads and they seem fine. but i just wanted to make sure. any help would be appreciated.
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Old 01-18-2009, 10:58 PM
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The ones I have are part # 12589227. I'm not sure what the difference is. What I have is the 4.020 MLS gasket
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Old 01-18-2009, 11:12 PM
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i think you have the gaskets for an lq9 motor, i have gaskets for an ls1 motor.
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Old 01-19-2009, 12:45 AM
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#12589226 -LS1 5.3L HO/5.7L GM MLS Head gasket LS1 02-04/ 05-07 5.3L HO
#12589227 -6.0L GM MLS Head Gasket SAME for LQ4, LQ9, LS2

here you go...

http://www.performancetrucks.net/for...d.php?t=428941
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Old 01-19-2009, 07:45 AM
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Originally Posted by 1FastBrick
#12589226 -LS1 5.3L HO/5.7L GM MLS Head gasket LS1 02-04/ 05-07 5.3L HO
#12589227 -6.0L GM MLS Head Gasket SAME for LQ4, LQ9, LS2

here you go...

http://www.performancetrucks.net/for...d.php?t=428941
yea i knew that. i was asking if the ls1 mls gasket will work with the lq9 heads that i am installing on my ls1. thanks
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Old 01-19-2009, 08:37 PM
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bump for more answers
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Old 01-19-2009, 08:42 PM
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Originally Posted by elias_799
yea i knew that. i was asking if the ls1 mls gasket will work with the lq9 heads that i am installing on my ls1. thanks
You should use the 6.0 Gasket since it will better match the combustion chamber on the head. I believe the 5.7 would over hang the chamber on the head and May not seal properly... I know it was explained on here before by Richard from WCCH...
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Old 01-19-2009, 09:38 PM
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Originally Posted by 1FastBrick
You should use the 6.0 Gasket since it will better match the combustion chamber on the head. I believe the 5.7 would over hang the chamber on the head and May not seal properly... I know it was explained on here before by Richard from WCCH...
thanks, that is exactly what i was looking for. if you have a link to where it was explained i would really appreciate it. thanks again
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Old 01-19-2009, 09:40 PM
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Sorry,I have been searching but I can't seem to find it... Maybe you could shoot him a PM and He could Explain it real Quick for you...

Good luck!!! If I do find it I will post back
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Old 01-19-2009, 09:58 PM
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You need to use whatever head gasket GM used on the LS6
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Old 01-19-2009, 10:14 PM
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Originally Posted by GMCtrk
You need to use whatever head gasket GM used on the LS6
aren't the ls6 gaskets exactly the same as the ls1 gaskets ? it is basically the same block.
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Old 01-20-2009, 12:31 AM
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Measure the width of the combustion chamber and cylinder bore diameter. Use a head gasket with a bore diameter larger than both measurements and in the thickness you prefer.
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Old 01-20-2009, 06:24 PM
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thanks, i made up my mind and i will go with the 6litre gaskets, that should solve everything.
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