new 3B head gaskets are MLS?! uh oh?

Joined
Sep 3, 2007
Messages
4,458
Location
Longmont, CO
I just got my new head gasket and its MLS (multilayer steel) as opposed to the original which was composite-with-armor-rings.

I've heard that MLS gaskets are better, but that they require better flatness and surface roughness specs. While I did have the head resurfaced, I have no way of knowing what roughness the shop achieved and I have no realistic way to resurface the block or check its flatness.

The new gasket is OEM toyota, 58110:
11115-58010 crosses to (starts out as a 1980/08 3B HG)
11115-58011 crosses to
11115-58012 crosses to
11115-58040 crosses to
11115-58110 which is the 3B/13BT HG up to 88/08 and then just the 13BT till 90/01.

The 3B splits off after 88/08 to 11115-58080.
IH8MUD Forums - View Single Post - 13B-T head gasket is same as 3B

Am I in for trouble, or should I shut up and trust Toyota? Are all my torque specs and such the same when I'm using the new type of gasket?
 
Joined
Aug 5, 2005
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Location
Southern Interior, BC, Canada.
when i had my 13bt HG replaced with the HG i ordered from 4wheelauto, the mechanic who did the install remarked that he had noticed that the replacement HG was of heavier and of stronger construction, than the cracked HG.
 

RufusTheDufus

DieselUpdate.com
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Joined
Jan 9, 2008
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2,680
Location
Maine
I wonder if the MLS gasket compresses less/more than the older style when torqued properly? Just thinking about changes in compression ratio. A .015" thicker gasket might lower the compression ratio a bit.
 

RufusTheDufus

DieselUpdate.com
SILVER Star
 
Joined
Jan 9, 2008
Messages
2,680
Location
Maine
Drew, do you have a photo of your MLS gasket? I'm curious what the area under the pre-cup looked like?
 
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