10
« on: 14 June 2008, 13:00:24 »
need more details
Does it sound like a metal whining or more of a whistle. If it's a whistle I would suspect the secondary Air compressor thingy (the real name escapes me), it can be disconnected as it usually just throws extra air into the exhaust if memory serves until the exhaust/engine warms up.
If it's a really loud shrilling screech, then I would suspect a pulley wheel, which needs sorting pretty darn quick, if it throws a belt it could cause severe problems.