new 3B head gaskets are MLS?! uh oh? (1 Viewer)

[amaurer]

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?

 

[Gold Boy]

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.

 

[amaurer]

yeah, the MLS gasket is quite a bit heavier and stiffer than the old one.

 

[stevebradford]

Drew, do you have a photo of your MLS gasket? I'm curious what the area under the pre-cup looked like?

Are you asking because you had the same issue after using a sub par head gasket?

No layered metal under the pre cups with this gasket and they ting’d their way threw all the gasket material and into the piston despite being slightly proud of the head.

This head gasket that was used there’s not reinforced metal under the pre cup seat. When loading the truck up the pre cup gets hot and expands compressing the fiber gasket. Eventually compressing the gasket material enough that it’s no longer tightly pinching the pre cup between the block and head allowing it to rattle. The factory mls gaskets having a bunch of metal for the pre cup seat expand and contract with the rest of the materials keeping things tight.

That’s my theory, I’m blaming the head gasket.

The differences.

 

[stevebradford]

Snooty and unhelpful

 

[stevebradford]

What other purpose do these threads serve other than for future reference..

guess you can expect that level of response online.

 

[samuelsmith]

My head cracked last year, I didn't know there was a difference and used the non layered one. Lasted about a month. Ended up having to take it all apart and do it again. I was not happy but on a positive note I'm pretty good at replacing a 3B head gasket now.