supspt454

iTrader: (3)

I posted in another thread about moisture in my oil. Though not real bad, it is milky and brown. I really haven't put much run time on the engine since I re installed the heads. It's a 98 LS1. I bought some head gaskets from a guy off here. They are the multi layer shims for the later model I believe. Anyway, I just read that the later model gasket CAN NOT be used on the 97 and 98 model Gen III LS1. Is this true? Although I will be glad that it's a simple head gasket instead of a cracked block due to my fear of blind threads, it will still suck to pull this engine once again!!! Thanks guys
Shawn

supspt454

iTrader: (3)

Quote taken from another forum:


"The 97-2000 gaskets used a fibre gasket, for lack of a better description, and had to be used with the older heads (97-98 perimeter bolt valve cover??) due to a notch in the head gasket sealing area that a newer MLS gasket will not seal. The bore sizes for both are the same.

For the newer block and 00 LS1 heads the 2001 and up gaskets should work fine."

And that's my read...

JB_97ws6TA

iTrader: (6)

I hope someone can clarify, I don't have my heads in front of me right now but I just ordered some MLS gaskets for my 806 heads and would like to know if I should try and exchange them for graphite.

chrisfrost

iTrader: (8)

I would say that You would probably be more safe with the graphite 1's ,,,,,,,,,if I were You I would either message or call a cpl more experienced engine builders and ask them ,,,,,,,,more opinions ,,,,,,better

bww3588

iTrader: (49)

As far as I know all 806 heads and some later 99-00 853's have the notch. I haven't delt with a set of 806 heads in a few years so I can't say for sure. However, I have 2 sets of 853's in my garage and one set has the notch and one set does not.

vettenuts

iTrader: (4)

SDPC used to have a very good photo and explanation of the notch and the head gasket differences in their catalog. Check their web site and see if the catalog is available for download. It will answer all the questions.

CWellman

So is it the heads or block that wont accept the new style gasket?

supspt454

iTrader: (3)

@CWellman: that's a good question.

supspt454

iTrader: (3)

GM Multi-Layer Steel LS1/LS6 Head Gasket Set

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Price: $29.99

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Product Description
This is a PAIR of cylinder head gaskets sold as a replacement for LS1 and LS6 applications.dum Cannot be used with 1998 LS1 heads.

Each gasket is interchangable and will fit either side.dum Approximate compressed thickness is 0.051".

supspt454

iTrader: (3)

I guess that answeres my question. This is the gasket I installed on my 98 LS1. You live and you learn I guess!

supspt454

iTrader: (3)

GM Graphite Head Gasket Set for 97-98 LS1 Engines

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Price: $39.99

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Product Description
This GM graphite head gasket set for 1997-1998 LS1 engines contains a pair of replacement Cylinder Head Gaskets. one LH and one RH. Approximate compressed gasket thickness is 0.051".

This is the one I need.

bww3588

iTrader: (49)

The heads won't accept the newer gasket. You don't see this problem around here much as not many people run with the 806 or 853's. Good info in here.

JoshuaGrooms83

iTrader: (2)

so just a bit more clearification, its the HEAD that wont accept the new MLS head gaskets? so if switching to somthing like 243s, id been fine going with new MLS headsgaskets right?

bww3588

iTrader: (49)

You will be fine. It all boils down to the head.

I used mls gaskets on my 98 with 5.3 heads, no problem.

JoshuaGrooms83

iTrader: (2)

ok cool, so im looking in the right direction lol now for the thickness lol

Tyrel2018

iTrader: (8)

i have a 1998 camaro ss with the 806 heads and i have MLS gaskets with no problem and the notch has not been filled. i check my fluids all the time and i have yet to have a problem.