I have replaced the front seal on 300D engine. While the engine had
synthetic oil, a fair amount of oil bypassed the seal and is all over
the lower engine. Oil leaked in various areas in the upper engine area
as well. Bottom line: I want to degrease and clean up the engine and
engine compartment. Does anyone have any tips or cautions regarding
using degreasers, steam cleaning or hot (car wash) spray on or around
the engine, etc.?
If it were my car I'd leave it as is. The motor doesn't care, you do.
To answer your post, don't spray a hot motor, especially the exhaust
manifold as its sudden cooling may crack the cast iron. Before spraying
the motor cover the alternator and engine air intake to keep them dry
and don't spray the starter. I'd use a garden hose and nozzle; wear eye
protection as some water and dirt will be deflected and do the job where
the residual dirt and oil ought to be left.
On Jan 26, 10:39 am, "-->> T.G. Lambach <<--" <"T.G. Lambach at
I would leave it as it is, except that I don't like working on an
engine or in an engine compartment that is fouled with oil. Had it not
been for these recent leaks, the engine and compartment were pristine
up until a couple months ago.
I will take you advice on doing the job, and hope that I only have to
do it once.
I would wash your engine warm... soak the whole compartment except
electrical relays with Simple Green or any biodegradable degreaser... Then
just hose it off with your garden hose.
Do not use pressure washer period.
As far as self car wash... you can do it with the degreaser and then gently
with the pressure washer wand... keep it as far away as possible. A good MB
mechanic I know actually did it in front of me... engine running and all at
the self service... he soaked it with degreaser and then procees to pressure
wash it off while enigne is running. Clean as a whistle in the end.... I am
not sure if I got the gut like that to do it.
I don't like to work on a part/engine that is fouled with grease either.
However, the dirt/grease works like protection coating. The bare
metal oxidizes fast if it kept too clean. So degrease/wash it only as
Since I do most of my car jobs by myself, I save the used ATF. It is
excellent cleaning agent, especially for the engine grease. Diesel fuel
also cleans pretty well but it smells bad and eats gloves quickly.
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