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Good advice... (archive)
[ Follow Ups ] [ 7-series (E32) Message Board ] [ Msg. Board FAQ ]
Posted by Mark in SBA on April 29, 2001 at 20:14:42:

In Reply to: Re: My ntakes sealed well with Hylomar posted by Rick Stillwell on April 29, 2001 at 19:29:06:

Rick,

I've just removed my 80K "spacers" (BMW's nomenclature) this afternoon and they were a mess - lots of tiny hairline cracks around the periphery of the inside. You can be sure I'll be using Hylomar when it comes time to button it all back up.

Also, I noticed the new spacer contains a ridge, whereas the original that came with the car did no. Could this be a new and improved gasket?

I think the reason the intake manifold and head are not joined directly is due to the tuned mass the manifold creates - that's a lot of weight to cantilever off the head. Apparently the spacers (or gaskets) decouple the head and the manifold to eliminate certain resonances.

Read that is some BMW technical brochure a while back.

Mark
92 850i

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