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ChrisBennet ChrisBennet is offline
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Join Date: Aug 2001
Location: Nashua, NH USA
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It's important to have scratch free rocker shaft bores if you want to avoid leaks. Here's what we're dealing with:

To avoid scratching the bores where the rocker shaft seals you want to clean the bore before you remove the shaft.
The rocker shaft sits flush with (or even sticks out a little) one side of the rocker shaft bore (A). The other end of the rocker shaft sits in a bore that has a lot of exposed area and that bore tends to get dirty and corroded (B).

If you remove and install the rocker shafts from the "A" side you avoid pushing the shaft over the rough and possibly dirty surface found at the "B" end.

I don't like the idea but I know someone who seals the exposed end with some silicone or RTV after the shafts are installed. I guess the worst that can happen is that some falls off and drops down the spark plug hole.
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'07 BMW 328i Coupe
Old 02-10-2005, 11:28 AM
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