lol, I can see your point.
However the engine is the heart of the beast, when she`s gleaming, she`s happy. When she`s all coated up and mucky, it`s just not the same.

There's a sexual psychobabble correllation here somehwere, I just can't put my finger on it ;) :rofl:

OK, you have finally goaded me into making a response...
I have cleaned my engines for years... incidentially it is an engine, motors are different. Motors require entirely separate energy inputs- think electric motors. Engines have their own energy supply-like a gas tank... but I digress.

I have owned 12 BMW autos in a row. I always clean the engine, let me tell you why.
First, a clean engine makes it easier to tell if you have a leak or a problem. Two, a clean engine is easier to work on and your mechanic will appreciate it and may do a better job. Three it will run cooler. Four it looks better.

How to do it? If it is now really dirty- use the Gunk degreaser or another brand. I always liked the original Gunk- the one you mix with a solvent like mineral spirits, but that is now obsolete.
If you want a "greener" alternative look for Simple Green and mix it strong. Spray your cleaner everywhere, avoiding the electronics, and the (outside) paintwork- like fenders and hood.
Then take a brush and brush the solvent around the dirtiest areas- to loosen up the grundge. Re-spray the engine, and then wash it all off with a hose. You can spray hard, but again avoid a lot of pressure around the electronics.

After the spray, if you have a lawn blower- blow it all down. You can wipe off the parts you didn't wash and also the hoses.

I take a leaf blower (compressed air would work a little better if you have it) to blast out all the dirt, then I spray a light coating of Vinylex on the engine and wipe off with a cloth.

All kidding aside, to me, it depends upon how dirty everything actually is. To some "dirty" means dusty, which to me doesn't warrant a good de-gunking, to others "dirty" means an oily/greasy mess, which, I've never seen happen to a BMW that is fairly new (i.e. under 5 years oldish), obviously there are exceptions.

I have come across a lot of electrical problems because customers jet clean their engines!
Personally,I prefer to clean my engines the slow hard way,with water,detergent wet cloth and small brush for those hard to get places,then I use a dry cloth and when its all dry,I apply a bit of dashboard shine to bring it up sparkling new!
If you must jet clean your engine ,at least ensure that you put a plastic bag and secure it with elastic bands on any electronic components and avoid pointing your jet nozzle directly on these components!!!!Then use compressed air to blow away excessive water......

I'll say it again " Nothing has ever been easier than this. I usually ask the dealer to include that with service. They know how the job should be done, what to use. If your not ready for service it has been worth is in the past to have them do it anyway. I have never paid any more than $50.00 to have it done. It can also be included in a detail job. Either way it has always been better than doing it my self, a job I might say i have done many times. I guess I believe my labor and time is worth something as well. It's kinda like oil changes. In my area BMW has coupons for $45.00 oil changes. For me at least I can't see the point of doing it myself with that price. But I agree some folks like the hands on approach. If that's a persons thing go for it. I guess i'm getting old always looking for the easy way out.

Totally agree with you!Its a good price and they know the job,so its not really worth it loosing our time over it!My engine cleaning tips were for those of us who want to take up the job themselves should they not have a dealer õr someone else they can trust to do the job properly......

beware of very high pressure water under hood.
Asking for electrical trouble that is :(

:iagree: