If you are talking hot, pure steam vapour (230 - 260 degrees F), then yes, it is a very effective way to clean old engines. The vapour converts grease into tiny particles that just fall away. Because the steam is distilled, it has no electrical conductivity ability. It is safe on electrics. If used properly, it will not harm paint or plastics.tekhen said:To the experts out there....
Aside from cosmetics is steam cleaning an engine any good, especially on an older car?
I do not recommend using a pressure washer on the engine.II kings 9:20 said:Simple green is good, I don't know but I hope the car wash places have a grease trap because the drain water is recycled to wash your car.
Be careful using this concentrated as it will eat the clear coat off your paint. A friend had that happen to him.joecool72 said:use Simple Green Automotive cleaner. This is biodegradable so you can use it in your driveway and just use a garden hose to slowly rinse off or use paper towels to clean in more sensitive areas.
All good points, water always wins, if using these systems don't pull the high pressure trigger. Best to do at home if you don't mind oil and solvent in your driveway and lawn.Northern Rider said:I do not recommend using a pressure washer on the engine.
Too much force.
Too much water.
Not a good degreaser.
Good way to get water in the wrong places - air filter; fuse box; wiring harnesses, etc.