MLS or Uprated Rover Gasket (2 silicone layers)

[Dark Knight]

i thought the MLS was the best one to be upgraede too, is that right??

[Rich]

The MLS gasket is a Rover one...

The MLS one is the one MG Rover used on the very last TFs off the line and was also adopted by Lotus. It was developed at huge expense by Land Rover so that they weren't left with piles of K Series engines destined for Freelanders that were unreliable and would affect the brand. As it appeared to have worked, I'd stick with it. That's what's been in mine for the last 27K!

Rich

[Dark Knight]

So you have to Multi Layer Steel Rich?

I am so so confused, i thought that the progression was as follows:

First type of gasket single silicone bead
Second type 2 silcone bead, upgrade from previous
Third was the MLS

Just been to see a guy who says he doesnt use the MLS gasket but the 2 silicone bead one...................

ARRRGGGGHHHHH this is driving me up the wall.........

[Rich]

So you have to Multi Layer Steel Rich?

Yep, genuine Land Rover!

The silicone bead gasket was just a mod to the original one and not a redesign. It was short lived as it wasn't exactly a vast improvement. However, the MLS was developed from the ground up with a full understanding of the problem and took it's design queues from other lightweight engine developers. MG Owners' Club also recommend the MLS and have never had a car they've fitted one to come back.

Here's some technical details courtesy of PTP, specialists in 'K' series engines...

After Many years of Head Gasket failure on the K Series engine, an interesting development was the introduction of the MLS head gasket. Payen leads the way in the development of high-grade coatings with its multi-layer steel (MLS) gasket range. Payen’s MLS gaskets deliver the rigidity and sealing integrity that today’s lightweight engines need, giving the ultimate sealing every time.

Why use the Payen MLS gasket:

• Reduced engine structure distortion
  
• Increased durability and performance
  
• Low-bore distortion
  
• Low oil consumption and reduced emissions

The gasket set consists of a steel gasket consisting of 5 layers. In the centre is a steel shim with swaged on fire rings - which appears to be very similar to the original gasket designs. This, like the original gasket is encased by two steel layers - rather like a sandwich. The gasket has an additional two steel layers on either side of the gasket with swaged / raised areas to provide the coolant/oil void sealing. These layers are there to help prevent any coolant leakage failures.

The other interesting feature of the new gasket set is the so-called 'sixth layer' or shim. The shim, as shown opposite (left), is inserted between the MLS gasket and the cylinder head, black surface uppermost. The shim is coated on both sides: on the upper side (the head-facing side) with a dry sealant (it has the same black, glossy appearance to the gasket face opposite) and the lower side is coated with an inert matt-grey treatment - and it is this side of the shim that comes into contact with the upper surface of the MLS gasket.

The shim appears to provide two main roles. Firstly it prevents the fire rings on the gasket digging into the cylinder head. When the head is torqued down, the fire rings are crushed between the liners and the cylinder head. The shim prevents the ring from digging into the head, and enables the 'ring to roll over the gasket layer in the manner in which it was designed.

Secondly, and the potential advantage of this system over the original gasket design, it acts as a protective layer to the cylinder head, a layer that comes into its own if the condition of the head is less than perfect. Examples of this is where the cylinder head has gone soft, or where the casting has an imperfection close to the combustion chamber; the shim will help prevent the liners hammering into the head.

I would have posted a direct link but it didn't work!!!!

Rich

[Dark Knight]

Rich your a Star!

So as i thoight will stay clear of the modified 2 bead.....

Just need this guy to call me back now so i can get him to come do it

Thanks




Paul

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