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      05-06-2021, 04:01 PM   #4
tracer bullet
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Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

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My tips would be -

Wash in the driveway, and just let the hose dribble on it. Remove dirt with a brush - like a wheel cleaner, something thin on a stick or use a variety of shapes.

Tire dressing can make things look decent. Simple green is a good grease cutter.

Use chemicals sparingly and try to avoid the belts and pulleys.

Generally you should be fine but there's always a chance. On my last car I had to replace the alternator the day after I washed the engine, the bearings were suddenly squealing. Coincidence?

Definitely never when it's hot.
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