look well on a z4
Z4 3.0si N52 (facelift) hissing / performance issues
- Thread starter David
- Start date
- Joined
- Dec 4, 2011
- Points
- 226
- Location
- Langley Mill
- Model of Z
- Z4 3.0si Individual Ruby Black Last one produced in this colour combo
I love the look of your wheels and think they would look stunning on mine. Where do you livelook well on a z4
@billz more importantly how much would you like to pay ??I love the look of your wheels and think they would look stunning on mine. Where do you live
Tony.
Honest Guv, it wasn't stood on bricks when I went to work this morning . . . . . . . . . . . . 
Tony.
Tony.
These folk from Derbyshire - all got sticky fingers or what?I love the look of your wheels and think they would look stunning on mine. Where do you live
- Joined
- Dec 4, 2011
- Points
- 226
- Location
- Langley Mill
- Model of Z
- Z4 3.0si Individual Ruby Black Last one produced in this colour combo
Too right. You dont get anything for nothing you have to borrow things on the never ever process
They are nice wheels but Bricks are not a good look
- Joined
- Dec 4, 2011
- Points
- 226
- Location
- Langley Mill
- Model of Z
- Z4 3.0si Individual Ruby Black Last one produced in this colour combo
I think those wheels would look good on mine and yours would look good on bricksThey are nice wheels but Bricks are not a good look
I wish it was this simple but unfortunately the 'squirting' noise has been present since before an oil change when the filter was also replaced. The replacement filter (Mann) was also replaced due to ill fitment (eurocarparts).
So three filters later, the noise is still present.
Yes.
MOT tomorrow, so I will ask my Indy to have a good look around the car on top of the usual checks to see if he sees anything amiss. Wish me luck!
Good luck tomorrow and hope they find it as the car sails through its test
- Joined
- Dec 4, 2011
- Points
- 226
- Location
- Langley Mill
- Model of Z
- Z4 3.0si Individual Ruby Black Last one produced in this colour combo
Lets hope he can find something and that the Z passes the MOT. Good luck David
PJ_
Newbie
- Joined
- Oct 9, 2017
- Points
- 1
Hey David, did you manage to find and cure the problem?
Hi PJ,
MPG has risen since reverting to the stock airbox, but the subtle hissing is still there. I’ll swap out the crankcase vent valve in the near future, and the manifold gasket, and see what that does. Otherwise I’m resigned to the fact it’s a ‘quirk of the engine’...like many others have before me!
Are you experiencing the same problem?
Last edited:
PJ_
Newbie
- Joined
- Oct 9, 2017
- Points
- 1
Not the same problem Dave but Ive got a code for "weak mixture on bank 2" which may be a manifold gasket, but no smell of fuel which I thought was strange on yours. Of course the answer is to spray carb spray which I'll have a go tomorrow. Have you tried that yet Dave.
Definitely worth trying Carb. cleaner or even Brake cleaner if it sucks that into the combustion you will know.
Tony.
Tony.
Time to update!
This weekend I finally made a start replacing the CVV and inspecting everything under the intake manifold.
Here I very nearly have the manifold out:
As you can see, there's plenty of oil on the underside of the manifold, and at first I thought "hooray, it's the CVV leaking".
Once I got the manifold out, it was clear to see the oil was not leaking from the CVV, but instead from the Secondary DISA valve that is located on the underside of the N52 mani.
Engine bay looking very empty:
I pulled out the Secondary DISA and:
The permanent gasket and inner seal is f*cked.
Phoned up BMW, and ordered a replacement at an eye-water £220, with forum discount.
Now, I don't mind paying for replacement parts when they've stopped working, but having to pay that amount for a part, just because a bit of rubber has failed is a different story...
Inspected inside the intake manifold, and as I expected from looking inside when removing the Primary DISA valve a while back, it was coated in oil. This is probably the reason for the rubber on the Secondary DISA failing, and is almost certainly caused by a failing CVV.
To be honest, I'm actually relieved that I've located two genuine issues after all the work involved in removing the mani. At least I now know I most likely won't need to remove it again ...he says!
The starter motor is occasionally not disengaging so I'll be inspecting and repairing/replacing that while I'm here, and a couple of little bits too; an engine vanity cover torx screw and a couple of hose clips.
I will update once all is reassembled!
David
This weekend I finally made a start replacing the CVV and inspecting everything under the intake manifold.
Here I very nearly have the manifold out:
As you can see, there's plenty of oil on the underside of the manifold, and at first I thought "hooray, it's the CVV leaking".
Once I got the manifold out, it was clear to see the oil was not leaking from the CVV, but instead from the Secondary DISA valve that is located on the underside of the N52 mani.
Engine bay looking very empty:
I pulled out the Secondary DISA and:
The permanent gasket and inner seal is f*cked.
Phoned up BMW, and ordered a replacement at an eye-water £220, with forum discount.
Now, I don't mind paying for replacement parts when they've stopped working, but having to pay that amount for a part, just because a bit of rubber has failed is a different story...
Inspected inside the intake manifold, and as I expected from looking inside when removing the Primary DISA valve a while back, it was coated in oil. This is probably the reason for the rubber on the Secondary DISA failing, and is almost certainly caused by a failing CVV.
To be honest, I'm actually relieved that I've located two genuine issues after all the work involved in removing the mani. At least I now know I most likely won't need to remove it again ...he says!
The starter motor is occasionally not disengaging so I'll be inspecting and repairing/replacing that while I'm here, and a couple of little bits too; an engine vanity cover torx screw and a couple of hose clips.
I will update once all is reassembled!
David
Nice work mate. Shame about the costs involved with the disa though.Time to update!
This weekend I finally made a start replacing the CVV and inspecting everything under the intake manifold.
Here I very nearly have the manifold out:
As you can see, there's plenty of oil on the underside of the manifold, and at first I thought "hooray, it's the CVV leaking".
Once I got the manifold out, it was clear to see the oil was not leaking from the CVV, but instead from the Secondary DISA valve that is located on the underside of the N52 mani.
Engine bay looking very empty:
I pulled out the Secondary DISA and:
The permanent gasket and inner seal is f*cked.
Phoned up BMW, and ordered a replacement at an eye-water £220, with forum discount.
Now, I don't mind paying for replacement parts when they've stopped working, but having to pay that amount for a part, just because a bit of rubber has failed is a different story...
Inspected inside the intake manifold, and as I expected from looking inside when removing the Primary DISA valve a while back, it was coated in oil. This is probably the reason for the rubber on the Secondary DISA failing, and is almost certainly caused by a failing CVV.
To be honest, I'm actually relieved that I've located two genuine issues after all the work involved in removing the mani. At least I now know I most likely won't need to remove it again ...he says!
The starter motor is occasionally not disengaging so I'll be inspecting and repairing/replacing that while I'm here, and a couple of little bits too; an engine vanity cover torx screw and a couple of hose clips.
I will update once all is reassembled!
David
Tony.
Thanks Tony - I hate to say it, but the car being a low-miler before my ownership is the probable reason for all this. Lots of short journeys, and lots of time sat still for the oil to destroy the rubber.Nice work mate. Shame about the costs involved with the disa though.
Tony.
Could well be mate. Was the "hissing" the air by-passing the valve through the b******* seals?
Tony.
Tony.