Originally posted by 'davidv'
This is my method. I do not necessarily recommend that anyone use this method:
1. Rinse engine bay and underside of hood with a fine spray of water.
2. Prepare a spray bottle of 50 Mr. Clean/50 water.
3. Spray underside of hood and engine bay. Let sit for 10 minutes.
4. Agitate dirty areas with a assortment of brushes.
5. Rinse with fine water mist.
6. Dry with leaf blower.
7. Apply dressing to damp cloth, then wipe plastic engine bay parts.
Photos below at 41,000 miles.
Summertime only, on a "no drive" day. Disconnect pos battery cable, better yet remove the battery. Use a power washer, stand on something, do not get too close, 10-15 feet is plenty close. Blast away with a soap solution, let it sit, then water. Simple Green first is also a good idea. Make sure it's completely dry, i.e. let it sit in the hot sun all day long, give it a very careful visual inspection (look at all your harnesses, if there's still moisture towel dry and wait another day). Re-inspect. If it looks bone-dry, re-connect or re-install your battery, start up and listen for irregularities, let it idle for 10 minutes is everything seems cool. You need to make sure there isn't ANY wayter touching electronics before you re-connect the battery or you will wish you never cleaned it off.Okay there have been debates on how some wash thier engine...By power washing... Do most leave thier engine running? or shut it off?