HALF-BREED

I just pulled of my stock 853 heads and I wanted to change out the head gaskets with the gm mls. but my questions is how much thinner if any is the mls compared to graphite because I have a very larger cam(244/248 .630"/.630" lsa 112) from New Era Performance (thanks Mike!) which I was assured wouldn't have any clearance issues with stock heads and head gaskets.

bichin95redta

GM MLS head gaskets are .057", I believe.

Damian

iTrader: (89)

The compressed thickness of an MLS is actually more than a Graphite. I think a Graphites compressed thickness is ~.42-.45ish, so you're actually gaining some clearance going with the MLS gasket.

02 BLK WS6

iTrader: (11)

Copper Spray dumdumdum!

massls1guy

iTrader: (9)

According to SDPC the compressed thickness of the graphite is 0.056":
http://www.sdparts.com/product/12498...GasketKit.aspx

and the MLS is 0.060":
http://www.sdparts.com/product/12498...2002andUp.aspx

But keep in mind those are the advertised numbers, actual measured could be a bit different.

405HP_Z06

iTrader: (11)

According to GM, MLS = .051 compressed

sroach20

iTrader: (31)

there is a chart on here that lists all the different gaskets and the thickness. does anyone have the link?

405HP_Z06

iTrader: (11)

From page 210 of the '09 GMPP catalog

HALF-BREED

Alright thanks guys this has been great help.

EVIL z28

If your heads have the windows cut into them the GM MLS gasket won't work. Im pretty sure 853's have the windows and leak coolant if you use the MLS gaskets.

02 BLK WS6

iTrader: (11)

Later model 853 are good for the MLS.

HALF-BREED

This motor is out of a 2000 trans am so would that be alright?

racer7088

You can tig weld the gaps in those early heads and then surface them a tiny bit and then you can use the MLS gaskets on them too.

HALF-BREED

When you guys say earlier what years are you exactly talking about? Or does anyone have any pics of these windows?

HALF-BREED

When using the copper spray what is the process to applying it? Spary it on the head,block and gaskets? or just the gasket?

JFM-jr

iTrader: (23)

These are my early year 5.3's I was planning on using the stock LS2 MLS gaskets on when they go on my LS2 block. Do these have these "windows"? Holy **** just when you think you have covered all the bases this **** is ENDLESS LOL.

'02 WS6

iTrader: (73)

I wish they made a .040 gm mls for price reasons, but until then I guess I'll stick with cometics and copper spray.

EVIL z28

JFM-jr your heads do not have the notches in them. The notches are located on the exhaust side of the deck on#3 and #6 cylinders.

JFM-jr

iTrader: (23)

Evil thank you for the response.

Phil'sC5vette

iTrader: (4)

i think when i calulated my numbers i used .054 compressed.

no one seems to know lol