I pressure wash my engine bays when needed.(Like a spill or something) You have to use discretion when doing it. You try to mist over the electrical items. I think what phil was gettint at is you can power wash the sides of the engine bay and front and behind the engine those are safe areas.

Also purple power is good stuff teamed up with brake cleaner(cheapest from walmart). And for those really tough gunky jobs use oven cleaner.

 

I tried that Gunk Engine Brite stuff and it works pretty well, never had any issues with it. Just follow the directions and use common sense.

 

lol at people ruining their engines. Gotta be careful with it just like every other part of the car.

https://www.clublexus.com/forums/sc-...s-weekend.html

 

Get WD40 and a toothbrush, along with a spray bottle with water and some shop rags. That'll get you a good clean.

 

so from what I am gathering is that the reason a 2j doesnt take to normal engine bay washing is because of the spark plug valleys? How hard is it to not spray that part of the motor? Ive cleaned other engine bays with cleaner and a garden hose and after ample drying time never had trouble.

 

The gaskets in the valley are either gone, dried up, or just plain torn. It's a terrible design by default except for heat dissipation which is what they went for I'm sure. It's basically a catch all for any fluids.

If you're smart enough to have an air compressor around you can blow pure water out of there but the problem is it mixes with residue from oil, etc and basically sticks to the walls of the valley and around the spark plug hole causing the wires to fire at the path of least resistance instead of the plug.

Also, I noticed that on a few 93's I saw they had weatherproof connectors (completely surrounded in rubber) but my 95 has regular weatherproof connectors (no rubber surrounding it all).

 

Lol I don't know how many times I've seen this thread.... "pressure washed my engine, now car won't start"

 

I've washed my 92 SC400 with Gunk on a warm engine and then hosing down with a garden hose and nozzle. Then blow the water off with a garden blower. I then spray and wipe off a rubber protectant. The engine bay then looks shiny and new. Never had a problem in 20 years since I bought the car new.

 

I believe you are the only one that I know that has a SC400 from 1992, and are the original owner. I want to see some pictures and more details about the car.

 

If you wash it you will most likely get water in the alley and it will missfire untill you remove t/b and clean it out