When I did my EA I just stuffed a rag into the intake snorkal, then sprayed degreaser everywhere. Came back 30min later and hosed it down with the hose on full, I did avoid spraying near the distributer and oil cap though.
I notice some water had pooled around the spark plugs so i just blew the water out of there. Started her up a couple of hours later and everything was fine.
When my XR gets dirty enough under the bonnet ill probably do the same.
When I was a mechanic one guy said when washing down an engine leave the car running because he once washed the engine of a Landcruiser with it off and some water got into the alarm(??) and because of this it wouldnt start for 3 days.
Another guy said to NOT wash it while its running as your more likely to short out an electrical componant.
1993 ED XR6 M5 (1 of 329)
Turbo on the way!!
1993 EBII Fairmont (Now wrecking, PM if you want any parts)
1988 Nissan R31 Skyline
I've always left it running, only coz i always do it down at carlovers. If it does stall on you, make sure you got a can of WD40 or something to get it going again. Just spray under dizzy cap and wipe after and also spray into the HT leads at the spark plug end...
I've never had a problem with it, infact i wasnt even aware it could cause problems till i read this. i just spray water everywhere at full pressure, all over the alternator, all over the engine, even when hot. never caused a problem tho, but ill be carefull in future now.
I only did this on my 3 decent cars, didnt bother about the rest. athough, i did need to dry out the distributor with a rag on the 929 or it wouldnt start.
I heard that its bad if you wash the bay, with a warm / hot engine, and you have an alloy head.
The Alloy head grows/shrinks faster than the iron block, so spraying water over an alloy head engine will cause head gasket problems.
However, when she's cold. No problems (that Im aware of)
Hmmmmmmmmmm... thats probly why my 929 blew a head gasket. it had an alloy head and i sprayed water all over it when it was hot. mind you the radiator was rusted to the shithouse as it was the origional one. that probly didnt help. and the temperature sender didnt work, so i didnt even know what the temperature was. Sadly. that was my all time favorite car.
I do mine with engine running but from a cold start (so no risk to the cold head) . Turn the engine on spray the degreaser everywhere hose off leave running until warm. Avoid getting degreaser on the belts or in the alternator; also avoid water in the alternator (ruins the bearings). Also of course make sure you don't get a lot of water in the air intake unless you want bent rods.
I doubt there is a big risk of a cracked head or blown head gasket washing a hot engine; after all what happens when you splash through a big puddle ? I guess using hot water might be the best solution.
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