This weekend I was doing oil change on my car and decided to check all
of the hoses. They all looked good except one hose, which felt a bit
loose. I touched the hose again and it literally fell off. Then green
coolant started coming out.
Hmm, this is weird I thought, the hose was not attached properly.
After closer inspection, I noticed that the actual extension on the
return hose housing, where the hose is attached to, snapped off. The
plastic had deteriorated and possibly could have collapse any time.
Luckily, this did not happen while driving.
One end of the hose is attached to the return hose housing. The other
end connects to the throttle body. The return hose housing is attached
to the engine and has three hoses coming out of it. The first hose
goes to the throttle body, the second goes to the radiator, and the
third one goes to the firewall (heating).
I need to get a new return hose housing (or whatever it is called).
So, I had look at the BMW ETK and could not find the part number for
the return hose plastic housing. It is shown on a diagram but it is
Does anyone know the proper name or the BMW part number for this
I think the same part is used on the M42 engine and (may be the same)
on the M43 and M44 engines too.
Here is the link to the diagram and the images of the part that broke
off my engine.
My car is a BMW 318i M40 1990 (manual).