Thread: Why silicon sealants should not be used on engines.

As others have said, silicone sealants are not the issue, the nuffy that applied it was. LR tdi engines come from the FACTORY with the sump attached with silicone.

Sometimes I think silicone was designed for LRs -= sometimes it is the only thing that will ensure a leak-free joint

Originally Posted by isuzurover

Sometimes I think silicone was designed for LRs -= sometimes it is the only thing that will ensure a leak-free joint

Thats what I was going to say.....

Nothing wrong with silicone, I use it all the time in heaps of applications other than Carbi's and Auto's and I have never had a problem other than a Laser rocker cover that the silicone actually privided a path for the oil to follow so I used gasket goo instead

No other way to control oil leaks on my machines as well, as oil leaks and greens dont mix......At all....

I prefer to use paper gaskets covered with aviation grade sealant. It is a sticky black substance, which you could almost desctibe as tar like. It never sets, so you can remove and re-use the gasket. When used on good surfaces, it does not leak water or oil.
Aaron.

Just love Three Bond sealant almost seems like a better quality silicone rubber much better than the average auto stuff that you buy.
Expensive though $88 a tube if you buy it from some places I found that if you buy it as a genuine Mitsubishi engine assembly sealant you get the same stuff for about $30 a tube well worth the cost. IMHO

Originally Posted by djam1

Just love Three Bond sealant almost seems like a better quality silicone rubber much better than the average auto stuff that you buy.
Expensive though $88 a tube if you buy it from some places I found that if you buy it as a genuine Mitsubishi engine assembly sealant you get the same stuff for about $30 a tube well worth the cost. IMHO

We have a winner

Although I pay $35 a tube trade, retail price is insane as you say, over 80 beer tickets