Pressure wash


KYRangerDude

15+ Year Member

Joined
Sep 24, 2010
Messages
85
Points
3,101
City
Whitley City
Vehicle Year
1992
Transmission
Automatic
Gonna pressure wash my engine and tranny ( installed) and wanted to know what/if anything I need to cover prior to doing this. Having never been around an EFI engine, I don't know what is moisture sensitive. Plan on doing it this evening if I can find out, or will have to wait till tomorrow and hopefully someone will let me know by then.

Thanx
 
for starters, coil/coil pack, plug wires, pcm, anything that could take water in. i wouldnt really blast places too hard.
 
Thanx.....mainly I'll be spraying from valve covers down. I'll pull the spark plug wires from the plugs and put them up out of the way. What about tranny? Anything there that water can get in? My valve cover gaskets were leaking and it's gotten all down the side of the motor and blowing on the tranny. Thought I'd just clean it off as well. And would help with any possible/potential leaks.
 
Let it run for 5 minutes before blasting it, and leave it run while you do it. There isn't too much on your engine to kill with water (remember, the engine bay isn't water proof, it gets wet in there during storms). Then let it run or take it for a good drive once you are done.

The heat from the engine will help to evaporate any water that may get into sensitive areas before it can do any damage.

Trans is fairly water resistant. You probably won't get any water in it unless your o-rings or pan gasket are shot already, in which case you may have water in it already.
 
Before you attack with the power washer:

Run for a couple minutes to get it warm, NOT hot, hit it briefly with low pressure to dampen it up. Then spray with Simple Green, Purple Power, dish soap/water solution, something to get the heavy grease emulsified. Use a small brush to loosen up the heaviest gunk, keep wetting/degreasing/brushing until all the obvious stuff is worked in. Then you can hit it with the pressure washer, but I dial down the power quite a bit. You're rinsing, not trying to get down to cast iron. Once you have all the soap/dirt/grease gone, start it and let it run a bit, take it for a drive and let it get up to operating temp to dry out any water that might have migrated into connectors, etc.

Spray it down with Engine Detailer, and it's beautiful again.
 
Pressure washed last evening. I did warm it up a bit prior and sprayed it down with purple power. Looks much better and now I won't have to get so greasy when I tinker with it. I've never heard of the engine detailer. Next time I'm at auto parts I'll check that out. I was however probably over cautious in spraying as I didn't wait on replies on here as it was getting dark and I wanted to do the compression test this morn. I did get the worst off, especially around the valve covers. Thanx guys for the helpful replies!
 
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