Hello all; I am new to the forum so please bear with me.

The engine (both top and bottom) of the engine on my 1984 300D is greasy and grimy. It will be easy to spray degreaser on the top of the engine and use the high pressure wand at the car wash. The underside, however is another story.

I can certainly get under there and spray degreaser and use a wire brush to loosen up the grease and grime. I'm thinking after spraying the underside of the engine with degreaser, a hot water pressure washer with a special wand attachment would be the best for breaking all the crud loose.

I'm also wondering if I could use a regular cold water pressure washer hooking up the supply line to my 50 gallon house hot water heater? I just installed a new 50 gallon hot water heater so there is plenty of hot water.

Would this arrangement work? Could I damage the hot water heater if I accidentally run it empty? Just an idea.

trying to save a few nickels.....