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.

 

The ones I have are part # 12589227. I'm not sure what the difference is. What I have is the 4.020 MLS gasket

 

i think you have the gaskets for an lq9 motor, i have gaskets for an ls1 motor.

 

#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

 

bump for more answers

 

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

 

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

 

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.

 

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.

 

thanks, i made up my mind and i will go with the 6litre gaskets, that should solve everything.