Thread: Hot Start Problems

Yep, reckon you're correct. I'd hazard a guess that the viscous fan is doing it's normal thing, - re-distributing the magic stuff for the first minute or whatever. Then the fluid settles and fan slows down to socially accpetable.

Efficient fan blades + close cowling + congested engine room + high-ish idle speed = Lotsa roaring wind noise and Worried Owner....

From memory, the son of satan parks itself in the open position at shutdown and therefore your start-up will be at a high idle, which the engine ECU quickly modifies to a more civilised RPM.
Any arthritis, gumminess or excess wear in the stepper valve thingy and it's response can be erratic and/or sluggish. There is a method of cleaning them, - I just unscrewed and hosed it out with carby cleaner, WD40, and descriptive language.

Remember that it's made from thin, die-cast alloy so be Nice to it !

Mine had tantrums for a few months, but now it only 'bites' my son when he drives Sarah...

There is supposed to be an earth-strap on the rear RH side of the 3.9 engine. Mine was waving in the breeze when I bought the car, hence the welding cable from alternator to battery. I don't have much faith in the bodywork being a good enough earth-return...

Figured out the problem. While the stepper was new and clean, it was loose so air was probably bypassing it. All fine now.

Although I also fixed a broken earth so, who knows.