Another roof issue

M

Mo996

Member
Hi all

Read many roof issues on this forum but still haven’t been able to resolve my issue following those steps/solutions. Probably doing something wrong. Need somehelp please!!!

2004 E85 Z4. Front roof motor unlatches but roof doesn’t open.

I have filled the reservoir with fluid and manually cycled the roof up and down. I can tell air has bled as the roof now only opens 1/3 of the way when manually cycled.

when I press the roof button, it unlatches and I can hear the pump going but there is no movement from the roof.

Here’s a picture of my pump in the boot.

What am I doing wrong?

Ps it’s never worked since ive had it but I’m determined to get it working whilst the sun is out!!!

Any help will be most appreciated.
 

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Is the motor crap? It may be missing the metal dowels in the impeller

Assume you have checked that the ports are correctly connected (12/14, 11/13) and that the power is the correct way round?
 
I’d also undo the 3 t10 screws that hold the bypass arm in place just in case that is putting pressure on the brass plunger
 
In the photo, the red ring looks like it is stuck half out, so maybe putting a bit of pressure on the bypass plunger?
Then all the things @bigwinn said. You only need one of the three tiny lateral pins to be missing from the metal rotor for it not to work.
 
bigwinn said:
Is the motor crap? It may be missing the metal dowels in the impeller

Assume you have checked that the ports are correctly connected (12/14, 11/13) and that the power is the correct way round?
Click to expand...
I removed the motor and bench tested it the impeller works as fluid is exiting the pump.

How do I check the ports? Are the hoses labelled somewhere?

Power is corrected and have tried it the other way too
 
Mo996 said:
I removed the motor and bench tested it the impeller works as fluid is exiting the pump.

How do I check the ports? Are the hoses labelled somewhere?

Power is corrected and have tried it the other way too
Click to expand...
As long as you band the hoses in the correct order as per previous post it doesn’t matter really- if you get them back to front then change the power polarity

I still think you need to check the plunger isn’t pressed in by the bypass as I and others have said
 
I am not sure if they are in the correct order i can only assume they are since the were paired when I got the car. I switched the pairs over which made no difference.

The plunger isn’t pressed as I removed the bracket that attaches to it and it still didn’t move the roof.

What is interesting now though is that the roof does not open beyond 1/3 of the way with the emergency cord pulled. Should it?
 
Ok guess that’s a separate question really. I was using the roof manually after disconnecting a pair of hoses.

Now I just want the electric operation to work
 
If it were my car

I’d check the hoses are in the right ports- you can see marked on the pump head 11/13- so connect those hoses to those ports

I’d check that polarity is correct and reverse them to see what happens

I’d try another pump- bench testing it means sod all if it’s not generating high psi

I’d check that the brass plunger isn’t depressed at all by removing the bypass armature

There is no point at this juncture looking at wiring or module issues as you say the pump is running

After that get it to one of us on here to have a look at it for you
 
Ok that sounds like a plan for tomorrow.

Quick question, I know the pump is marked, but are the hoses labelled somewhere? What if they are in the wrong pairs by chance?
 
Check if the bypass valve is stuck press down...its where the end of the red puller cable connected to, remove the black trim and you can see it.
 
bigwinn said:
If it were my car

I’d check the hoses are in the right ports- you can see marked on the pump head 11/13- so connect those hoses to those ports

I’d check that polarity is correct and reverse them to see what happens

I’d try another pump- bench testing it means sod all if it’s not generating high psi

I’d check that the brass plunger isn’t depressed at all by removing the bypass armature

There is no point at this juncture looking at wiring or module issues as you say the pump is running

After that get it to one of us on here to have a look at it for you
Click to expand...
Ok update. It’s seems the pump wasn’t generating enough pressure so I replaced the pump. Now it’s starts closing 1/4 of the way the stops.

It doesn’t open when the button is pressed - the red light flashes.

The power connections are the correct way.

I believe the hoses are rigged up correctly because when I hook up a power probe directly to the pump I am able to fully open and close it.

The passenger side ram does appear to be a bit noisy and struggles a bit - at the same point when closed with the button and it gets stuck 1/4 of the way.

Both latches works - though can be erratic sometimes and get the flashing red light.

There is suffienct fluid in the pump as it works with the power probe.

Where are the other sensors for the roof that could stop the roof from operating?

I feel I am getting closer to fixing it…I think
 
Wire break. 100%

Get the wires exposed that run down the passenger side, get the sheathing off and look for major kinks, bends or breaks
 
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