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Mike320msport

vac pump leaking

Question

Hi

I have a 320 petrol E90 that  has had a couple of vac pumps fitted under wrty when it was under the Bmw Approved used warranty scheme,( first one leaked straight away) and which is now leaking again a couple of years later,  is this because the vac pumps are rubbish or was wondering if these have a breather system which blocks which is causing too much back pressure and causing the pumps to fail ?

 

 

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Normally it's because the O ring style gasket flattens out. You can get a new gasket for them fortunately. You'll need to remove the pump and take the top off to replace it, while you're there you should replace the O ring between the pump and cylinder head.

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