Intake Manifold Removal

D

DiscoDaveZ4

Member
Looking for some advise, recently replaced the rocker cover on my 2.3i (N52B25) with the help of a great how to guide on here, did not take long, great writeup.

Replacement was due to a failed CCV and eccentric sensor and using approx 1ltr every 1000 miles and oil in the inlet manifold, engine has 150000miles and never been done

So the change all went well and managed to remove the ccv vacuum hose without breaking, so never did a full replacement.

Now engine feels and pulls better, but the oil level today dropped again 😢 I am now getting about 30% more miles to a quarter drop 250ml.

Could this be related to the vacuum hose having splits in it, I have no codes.

If its a replacement, is there any advice on removal of the inlet manifold, YouTube videos or how-to . I have found a few, but not related to Z4 E89

Or do you think I might have a bad cylinder and require a compression test.

I have read it's probably normal for this engine with this milage, im an engineer and like to rule things out. If its age related, I live with it....lol

The car was purchased as a temp car, but have fallen in love with it.
 
It is the nature of alusil engines to consume oil. I get about 2000 miles/litre and all is both tickety and boo.
 
My 23i burns 1 litre about 5,000 miles (just about oil change times)..
But my daily is a short journey of 8 miles twice a day so car barely warms up.
Manifold off it is slightly oily. I think it's just poor oil scavenging in the design.
I fitted new came cover at about 90k miles, now on 110,000.

I believe these engines designed to run really hot. Does yours come up to temp. I see (guessing now) about 110 on a summers day good run.
Today going to work won't get above 80.
Another clue does the fan ever kick in. I have barely heard it run.
 
Last edited:
I carefully disconnected the ccv vacuum hose today, it seems the ccv is still pushing oil into the intake, via the vacuum hose. 😠

I will have a look to see what it is like to open the oil cap and check vacuum.

Or could it be that the gasket is not correctly seated, but surely this would leak, which I do not have

Any ideas?
 
You must log in or register to reply here.
Back
Top Bottom