Engine detail
when we operated our own detail centres and as we train the staff of our equipment system customers, we teach them to "detail" the engine.
We pressure wash the engine and engine compartment with water first.
Then apply engine degreaser, a high pH cleaner with caustics (careful to avoid applying to aluminum head covers as they will stain)
Use an engine "wash mit" and brushes to clean the engine and compartment starting with the underside of the hood if there is no insulation piece installed.
The engine is then rinsed; inspected and any dirt/soil missed is removed.
The engine is then sprayed with a water-based dressing and allowed to dry
With this process we have a perfectly clean, shiny and detailed engine and engine compartment. For this service at the retail level we charged $50 to $75, if they did not want to pay that price they could either go to a back alley detailer or the self service car wash.
On our Sales & Service Invoice we had a disclaimer (that they acknowledged) when signing the Invoice). Never had anyone refuse to sign and never had any problems with the customers or the engines.
As an aside, had occasion to spend an afternoon with a German Mercedes Benz service technician who was assigned to a dealer in the Middle East and asked him about steam cleaning engines in a MB and the dangers of doing so.
In a typical Prussian way, he laughed at the question and said, "Mr Abraham, do you think we seal the bottom of the engine compartment? We have snow and rain in Germany and the engine gets a great deal of moisture from the bottom up. If the parts that are to be water-proof in the engine are in tack there is no problem steam cleaning an engine." And, he laughed again.
That is why I purchase American cars.
Regards