weirdest thing happed after washing my car...

D

dmo

Member
 London / Surrey
I'll keep this short.. please shout if you've any idea whats going on though!

- washed my car. give it a good wash. it was cold. haven't driven car today.
- moved car off the road onto the driveway after I washed it. takes 1min. car still cold.
- parked it the usual way (reverse, then handbrake up, into P (its an auto), then foot off the brake, ignition off

here comes the problem:
- walked to front of car and could hear a fan noise. waited 30sec to see if it stopped... hadn't heard it before and thought maybe it'll stop. car door was still open. closed the door and locked car. fan noise still going (1min). unlocked car.. still going. popped hood. looks like the belts were still in motion at the front of the bonnet (timing belts or smth?). I've never see this happen and the car was cold.. and wet too. I started it up again then turned it off and this time the belt stopped with the car (this is the usual behaviour).

I'm puzzeled... didn't know that mechanic even worked with engine off etc. what's the deal, anyone know? thanks ahead..
 
that's what um saying. is the fan part of the belt? it was a machine-like fan noise, kinda like a slow hairdryer. if its the fan (connected to the belt) then maybe i got water in and it screwed the electrics. I have a potential dodgy battery anyway I think.. when its cold my clock/date/milage resets.. but I doubt its related.
 
solved.

After the engine is switched off, the fan may continue to operate at varying speeds (based
on the ECM calculated catalyst temperature). This will cool the radiator down from a heat
surge (up to 10 minutes).

http://www.bmwmotorsports.org/BMW_docs/m54x5.pdf
http://www.bimmerfest.com/forums/showthread.php?t=497665

Not my engine, but I suspect it's the same feature.
 
i get the exact same thing with mine, mainly when the engine runs for less than a minute after cleaning it or swaping cars on the drive etc :D

glad its meant to happen lol been wondering if something was wrong for a while
 
AH this may explain my intermittent battery light :D , perhaps it's staying on for longer periods of time due to another fault :cry:
 
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