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Thread: are the MLS steel head gaskets worth the money?

  1. #1
    oldschool18 is offline Cadillac Owners Member
    Automobile(s): 1998,1989,
    Join Date
    Dec 2009

    are the MLS steel head gaskets worth the money?

    Hello,I have a general question about the north-star 4.6 liter. Currently working on a 1998 deville with about 83k. I installed Time-serts at about 53k when the car began to overheat on the highway in 2008.
    when i pulled the engine apart back in 08 the head bolts seemed ok every bolt cracked loudly when loosened but the head gaskets themselves were in poor condition,they were separating on the bottom and seemed to crumble in your hands.I work at a dealership and i well know about the headbolt issue,so i drilled out all the holes,installed the serts and replaced every gasket /seal on the was perfect for 4yrs then about 6 months ago noticed she wanted a drink about every 6 weeks(no external leaks) and would sometimes have a rough idle in initial start-up 3-4 seconds at most.Then last month the car overheated after a long hill-climb at high speeds. so i take the engine out again and every sert is perfect,every bolt cracked loudly,no debris on threads or in threaded holes no real sign of coolant in cylinders(deck and heads are straight) but once again the head gaskets seem to be in poor condition esp on the bottom where the coolant passage surrounds the piston they are separating,I'm using the dex-cool 50/50 and have not changed it since engine was done the first time.I am going to stud the block with the north star performance stud kit which cost 550 dollars and really hate to spend another 300 for two steel head gaskets,would i be better off with the old school coolant or is there something i could be missing?? i would appreciate any input if you have experienced this

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  3. #2
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
    Join Date
    Sep 2010
    East Boston MA.
    The MLS gaskets are more suited to engines that will be disassembled often.


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