[VWNate1]

I use the purple industrial cleaning stuff from Sam's Club, dilute it at least 50% with water and use a gentle brush (I use paint brushes), spray it on and swab it around, don't let it sit or get dry, that's what damages the paint .

If you're quick and rinse very well it won't damage aluminum .

Some times takes a couple goes before the really hard thick old crud comes off bu you'll love the squeaky clean engine with no paint / rubber / plastic damage .

If you're more comfortable with the aerosol cleaners, GUNK Engine Brite # EB1 is the best there is, all those "steam", "foamy" etc. ones are crap .

Be aware this product WILL kill any grass / flowers / etc. the run off touches so chose your work area carefully .

Oven cleaners are O.K. but there are TWO TYPES so you must read the label or you'll get one that can corrode alloy metals ! .

Do your engine cleaning in the morning before it's hot or in the evening after the sun sets .