On or around Mon, 23 May 2005 12:42:55 +0000 (UTC), beamendsltd enlightened us thusly:
while yer here... don't suppose you have non-squeaky serpentine belts?
the 300 TDi here didn't squeak. Then the tensioner bearing got noisy so it was replaced (new tensioner) and then the water pump bearing collapsed so that was replaced. At the same time a non-genuine belt was fitted, as the old one had been damaged when the water pump failure threw it off.
it now squeaks, despite application of sundry different lubricants.
Graphite powder the most successful yet, it now only squeaks a bit.