Is it a good idea to spray your engine with wd-40?

[Fleetw00d]

Most engine cleaning products recommend using it on a cold engine. I've powerwashed mine (have an electric 1750 psi washer) without covering things, just avoided spraying the distributor and alternator directly; haven't had a problem yet.

[Ralphie]

i heard of someone taking there motorcycle to a self-serve car wash, hit it with the cold water from the hose and cracking the block.....

I wouldn't recommend washing a hot engine.

Everyones opinion is different but I would not pressure wash your engine...you could end up forcing water where it shouldn't go.

Just spray it with engine cleaner and hose it down when its COLD.

[project_x]

mine needs a good steam clean, has anyone had a issue with that, i saw it done before and it looks fresh from factory afterwards

[tonytoka1979]

If you take your car to a do it your self car wash and want to wash the engine bay and motor just keep it running and avoid directly spraying your electronics and exhaust.. should be ok, i do it all the time..

[oyajicool]

I use siphon gun and diluted de-greaser to wash engines. Rinse with water since it is corrosive and compressed air dry. Then I spray a product called Corrosion-X. This product is commonly used in aviation for corrosion prevention. I've done this to all of cars I've ever owned and drove. The dirt tends to collected but never had issue with over heating. If the engine appears to be dirty, I just do this treatment again.

[saqi44]

i just do it everytime, i keep the engine running and i power wash the engine, never have had any problem,just avoid spraying Distributor and Alternator.

[accord=inspire?]

all those before this post is not as much of a problem.
the smell is the biggest problem, home.

[JDM_CB7_TX]

Disregard previous post....

I am gonna say simple green motor while it is cool. Pressure wash cland and thats it... No need for wd-40 bro.

[The_Head]

Meh, it's debatable. This is just one of those instances where theres "more than one way to skin a cat" I just happened to use WD-40 becasue I had some available.

[cp[mike]]

ever since i redid it, i have always used WD40 to clean my coupe's engine bay. i have seen simplegreen remove stock paint, i did not want to see what it would do to rattle can. plus, WD40 doesnt need to be rinsed off when youre done

[Granite CB7]

^never knew simple green could do that, yikes! I've always tried to keep certain parts oiled/greased/antiseized w/ exposed threads like the acc. belt tensioners for example. I usually rinse the bay down ofter w/ just water. I've always used gunk foamy engine brite but lately have done simple green. Both work well. I never covered any of the components in the bay but my 1st issue in over 6 yrs was water in the dist. cap. But in all honesty, the cap seal was reused so many times, I was asking for it. The concept is correct, the WD40 will eventually make a nice oily protective layer for all the components like clutch/brake lines, etc.

WD40 stands for water displacement 40, it took 40 tries for them to get it right. Never knew that until I read their 50th anniv. can!

Alittle OT, but I have always sprayed the susp. parts down during the winter, like the exposed threads on my D2 coilovers, sway bar endlink hardware, b/j studs, etc... By the end of winter, there's a good caked layer of road grime stuck together by wd40, works out really well.