E46 318 ICV location (2002)

[andrewrob]

Trying to clean out the ICV on my dads car but I'm having trouble finding it.
I've followed some of the guides to online but they are for 330s and 325s so slightly different.
Is it either of the parts pictures below?
Thanks

[pits]

[quote=andrewrob]Trying to clean out the ICV on my dads car but I'm having trouble finding it.
I've followed some of the guides to online but they are for 330s and 325s so slightly different.
Is it either of the parts pictures below?
Thanks

|quote]
Is this the M43 engine? If so it will be under the inlet manifold

Little paint diagram for you here I have just done


Also on the back of the manifold is another black pipe which should just pop off as well.

Under the two bolts I have labeled as opposite each other back of the engine bay, there are two metal gaskets, they are fairly flimsy be careful with them, and there is a small vacuum pipe which runs under the manifold, be careful not to trap it.


Under all of that lot you will see a cylindrical object, unplug it this is the ISCV, give it a shake if it doesn't rattle it is jammed.


What is the problem you're having?

[andrewrob]

Thanks for the quick reply, the engine isn't the one shown in that picture.
Its this one below

ETA the problem is the idle speed jumping from around 500-1000rpm

[pits]

Chances are the ISCV is ok, what you need to do is get a tin WD40, and systematically spray every vacuum hose you can see one at a time, you have a vacuum leak

[andrewrob]

The only reason it made me think it was a sticky ICV was that its intermittent.
Is it worth me giving it a clean anyway whilst I have everything out (not that I can find it at the moment of course).

[pits]

ICV will stick either open or closed, if it sticks closed it wont idle at all, will cut out when you put foot on clutch etc, and if it opens it will idle, you can clean if needs be.

Get the WD40 and start checking the hoses, they usually are intermittent, chances are it is a split in a hose.

the ICV will still be under the manifold I am guessing yours is the N42 engine? Which is the updated M43 essentially, so it should still be under there, WD40 involves not taking the engine apart though

[InfoRetrieval]

pits said:

ICV will stick either open or closed, if it sticks closed it wont idle at all, will cut out when you put foot on clutch etc, and if it opens it will idle, you can clean if needs be.

Get the WD40 and start checking the hoses, they usually are intermittent, chances are it is a split in a hose.

the ICV will still be under the manifold I am guessing yours is the N42 engine? Which is the updated M43 essentially, so it should still be under there, WD40 involves not taking the engine apart though

I believe the N42 is a Valvetronic engine, which uses a fly-by-wire throttle. This means it might not have a ICV as the ECU can control the throttle directly under idle.

[andrewrob]

Ah right. I found instructions for removing the intake manifold but apparently you need a special tool to pull the oil separator up when reinstalling so I didn't bother.

I did however clean the throttle body out and check all the hoses and it all seems fine now.