[DennisAN]

When I first got my 986 it rattled for a second at startup. But during the IMS bearing install I pumped up the two removed chain tensioners in a pot of fresh oil before replacing them. After that no rattle at startup. It may be the two tensioners were "gummed up" somewhat since the car had barely been driven in the two years before I bought the car this past February. The dealer changed the oil before my purchase so this was also the second oil change in maybe 2K miles.

I suppose I could do the same for the Bank 2 chain tensioner too. But it faces downward so it's likely to drain between uses...so maybe it's less likely to get gummed up from used oil siting in it.