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Both my 9-5s had loose carpet, I don't think this is neceasrily indicative of cut wires. It likes to pull out of place. The oil switches do go bad, and bulbs can, too.
Oil gets in the intake from a bad turbo, so you may be on the right path with that part. PCV plays a role in oil control and if it's broken, you'll get oil fumes, too. Failed check valves can put boost pressure back in the crankcase. How much smoking was before/after they figured out it had too much oil?
Gas fumes may be a break in the EVAP system somewhere. If the CHECK ENGINE light is on, theres a code or codes to be pulled, so that can narrow it down.
Since you're skeptical about what the dealer has to say (a good way to be when they're talking big $$$!!) : before talking about major work, be sure all the vacuum hoses are ok and the PCV system hoses and valves are working. Get the oil pressure checked with a gauge. With the timing chain, check the tensioner for travel (not much about this on 9-5 board, search on NG900 and 9000, same principles apply).
The dealer is on about the balance chain because it's generally worse off than the timing chain if there's been oil starvation or an overheating event that damaged the guides.
I had a dealer Master Mechanics tell me (and I have no idea how much weight to put on this because I've heard it about older models with the same chain arrangement)...'some just make more noise.'
Use 'search' for the terms above, you'll probably find lots on each subject. Good Luck!
--fsik
99 9-5SE LPT
00 Aero
95 900SET
posted by 66.171.3...
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