Originally Posted by Mike9825
do you guys just wet your engine first before you spray the simple green or just spray it on there? i know you need to start with a cool engine. my engine needs some TLC -Mike-
If there is a lot of mud and dirt on it, I would.
I have heard of people using pressure washers, but I prefer a garden hose. The engine and underhood electrical system are pretty much waterproof, but some seals and gaskets just are not meant to stand up to high pressure water from a pressure washer. You especially need to be careful if you have any leaks at all. If oil can get out, high pressure water can definately get in.
What I usually do is hose off loose dirt with a garden hose, spray everything with Orange Blast (cleaner/degreaser comparable to Simple Green Automotive), let it sit for a few minutes, then hose off the Orange Blast. It works well for me.