Chris NottBadger5
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  1. #1
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    A4 2.5 TDI Cabriolet No brakes and No turbo

    I have recently had my a4 cabriolets cam belt replaced, however, it appears that in the process, I have lost brakes servo assistance and turbo boost. Perhaps something has happened to the vacuum pump in the process. Do the vacuum pumps on the 2.5tdi fail completely? Is there a way of telling whether it is the pump at fault?

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  3. #2
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    Check the plastic hose that comes off the brake vacuum pump at the back of the passenger cyl. head under the coolant bottle. The hose goes to a 1 way check valve which has a nipple which is prone to break. If it's broken then you can put some 2 parts resin bonding glue and let it set. You can buy 2nd hand on ebay , see this for example: PASSAT AUDI A4 A6 2.5 TDI - VACUUM PUMP CONNECTION PIPE | eBay
    or this: PASSAT AUDI A4 A6 2.5 TDI - VACUUM PUMP CONNECTION PIPE | eBay
    FOR SALE:
    -Golf mk 5/audi a3 1.6 FSI fuel pump, brand new genuine part boxed + seals
    -audi a3 (1998 to 2003) genuine clutch slave cylinder to fit 1.6 engines BRAND NEW
    -Rear bush press tool to fit new rear axle bushes on Golf Mk3/4, Audi a3/S3, Seat Leon/Toledo, Skoda Octavia mk 1/2 used once

  4. #3
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    ah, take the pump off the back of the n/s head. i bet whoevers changed the cambelt has lost or broken the drive bit. as you need to remove it to fit the cam alignment tool when doing the belt!
    or as adam said theyve snapped the plastic hose.

    take it back to the garage and kick off as theyve caused this!

  5. #4
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    I would not let the same garage touch it with a flag pole, been a bad experience overall. Shall check out the pipe and if not remove the pump. Will update on how I get on. Thanks for the advice.

 

 

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