Cometic (MLS) gaskets on 01 and earlier LS1s, is it realyl a No No
10-25-2004, 03:53 PM
#1
Cometic (MLS) gaskets on 01 and earlier LS1s, is it really a No No Subject says it all....
I got my heads off and checked my piston deck height, looks like .007 to .008
Was ready to start ordering parts and was hit with the "you cannot use MLS type head gaskets with 01 and earlier LS1s" story....
Looking for experiences and options...
Any help would be appreciated...
I got my heads off and checked my piston deck height, looks like .007 to .008
Was ready to start ordering parts and was hit with the "you cannot use MLS type head gaskets with 01 and earlier LS1s" story....
Looking for experiences and options...
Any help would be appreciated...
Last edited by SideStep; 10-26-2004 at 07:04 AM.
10-25-2004, 04:14 PM
#2
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If your heads have the notch out of them like hte 01 and earliers they will leak coolant.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
Last edited by Lesrace82; 10-25-2004 at 04:27 PM.
10-25-2004, 04:51 PM
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The mid year '00 and up heads do not have tha cast in slot on the head surface. If you get the slot welded up like I do mine then you canuse what ever gasket ya want.
10-25-2004, 05:29 PM
#5
Originally Posted by Lesrace82
If your heads have the notch out of them like hte 01 and earliers they will leak coolant.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
Thanks!!!
Can anyone send a pic of this "notch" ????
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10-25-2004, 10:18 PM
#10
Their is a tech tip with pictures in my 2004 SDPC performance parts ed.1. parts catalog about the notch on page 166, It shows the 97-98 have the notch in the picture indicated by a red arrow.
10-26-2004, 04:52 PM
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i've used both copper & cometic...cometics are the best IMO...AND you dont have to o-ring...they hold LOTS of cylinder pressure...now as for the notch for coolant deal, i'm all ears on this one
12-27-2004, 04:17 PM
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Originally Posted by Lesrace82
If your heads have the notch out of them like hte 01 and earliers they will leak coolant.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
edit. I didnt see the Cometic brand in the first post. Have had no experiences with those.
12-27-2004, 04:49 PM
#19
Originally Posted by ArKay99
I have Cometic .040" mls gaskets on my 1999 C5 w/AFR 205's. No problems, but the AFR's don't have a notch like the earlier heads. If I am not mistaken, I think the 5.3L heads have the notch.
12-27-2004, 09:09 PM
#20
I will take some pics of my LS1 heads I got laying here and someone circle a notch or where a notch should be, with an editor and repost...how about that 
11pm cst
edit: NM found a pic of the "notch"
https://ls1tech.com/forums/attachmen...chmentid=14855
11pm cstedit: NM found a pic of the "notch"
https://ls1tech.com/forums/attachmen...chmentid=14855
Last edited by mr2guru; 12-27-2004 at 09:18 PM.
