Re: Valve cover leak...
Just putting in my $.02 worth here ...... I seem to remember from working on a trawler I once owned that had an aluminum BMW diesel, that I was told that metals have a pecking order that requires different metals NOT to be used "together", and not use ferrous bolts with the aluminum fittings. Has to do with an electrolytic pecking order of metals. In otherwords, if you join aluminum with iron or steel, there can be an electrolytic reaction between the 2 metals, causing deterioration of the lesser metal.
This might be the reason aluminum bolts are used in this case, because of the possible electrolytic reaction over a period of time. A reaction of this type could lead to a scaling weld where one or both of the metals will lose structure when trying to separate them. Can anyone chime in on this?
EDIT: I see this was addressed already today .......
Last edited by IBLUBYU; Sep 22, 2010 at 01:10 PM.