I cleaned the engine on my last Mog with Gunk
Protected all the electrical connectors with plastic wrap - took a while as I was very careful
Put a large plastic sheet under the engine on the drive
Then used a large old paint brush to cover all the areas with Gunk
Rinsed off carefully with a hose
Went over again with the paint brush dipped in a bucket of water
Rinsed off again
Dried off with a hair dryer
Took the plastic off the electrical bits and connectors
Then treated all the black plastic bits with Aerospace 303 protectorant and polished any shiny bits
Made a huge difference and was very pleased with the result
