Question about 2003 BMW 330

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I have a BMW 330Ci 2000 Convertable with a hydraulic leak in the top mechanism. What do I have to do to find the cause of this leak? Do I have to remove the whole roof mechanism from the car or can I access the main hydraulic units and associated hoses/lines and cylinders by removing either the back seat or the boot linings.

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Well, replace the offending unit, then bleed the air out of the system...Sometimes you have to remove components and invert them to get all of the air out.

The headliner has to come out to access this area of the frame.
The leaking oil runs down the frame into the fender in front of the rear tire and leaks out onto the ground.The cylinder over the window is pretty close to the front of the frame. I suspect a pinched or otherwise damaged line may be possible for the leak.

To replace these lines you do not have to remove the headliner or the top material, the only lines that require removal of anything big is the main cylinders and the valve block. To replace these you need to remove the complete top assembly which sounds a lot difficult but it comes out pretty easy. But your problem will not require the top removal.------

click this link directly for parts description and parts disassembly:-----


This will help.Keep updated.thanks.Helpmech.

Posted on Mar 22, 2011


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