Date: Sat, 23 Jun 2001 14:36:58 +0100 From: "SimonJ" <menopsam.com> Subject: Re: Timing chain
> Questions: > 1.Anyone with experience with a broken timing chain in a > Saab engine. At what mileage? If so, is it a destructive > event to valves etc? It is not uncommon on 16 valve engines, and extremely destructive > 2.Has anyone replaced a timing chain as a "preventative" > measure? At what mileage Yes, at 107,000, chain, sprockets and tensioners were all showing signs of wear. > 3.What are the signs/symptoms that indicate the timing chain > should be replaced. Noise > 4.Anything in the line of advice. It would seem from what you say, that your tech is thinking of 'rolling in' a split-link type of chain. If this is the case, make sure he has the proper tools to install the split link, the link pin has to be compresed to expand it into the link. Also if fitting by that method, you cannot replace tensioners, guides, sprockets etc, which IMO are best changed at the same time as doing the chain, mine were all showing signs of wear. I would get him to quote you for changing all parts, they are not particularly expensive, and it is pretty easy to pull the engine on a 900. The +$1000 was probably acounting for repairs to the valves etc.
