Q: I hear lots of mixed things about MLS gaskets, whats the TRUTH?
about the MLS gaskets you may hear is false.
There are many rumors and
misunderstandings about MLS technology from the statement "MLS gaskets should be replaced yearly" to "MLS gaskets simply don't work" for example.
The truth is, many newer cars and
motorcycles are factory equipped with MLS gaskets. They would never have that
stipulation about replacing them yearly, or having them be more troublesome than older gasket material. These blanket statements are also false for aftermarket
MLS gaskets like our as well. So where do the reports of bad results come from?...
This is simple: MLS gaskets almost always NEED to be installed after your head (and in some cases your block) are resurfaced for a perfect mating surface. Due to the fact MLS gasket material is rigid (helping to resist blowing out) by design it can't make up for imperfections in the mating surface like softer gasket material does.
So while your BMW block is iron, and only needs to be resurfaced if your rebuilding your engine. While your doing a head gasket job however, the soft alloy head must be perfectly smooth AND straight to correctly mate along with the MLS gasket.
Also, stronger hardware helps greatly; now that the gasket doesn't want to blow out, combustion pressure wants to overcome the weak factory hardware. Installing an MLS along with upgraded hardware is highly recommended.
If everything is correctly installed as per your included instructions, you will have fantastic results with MLS technology. Without having to resort to cutting ring or pyramid gaskets.