MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Husy on April 22, 2025, 04:23:21 pm
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A local VW specialist recently replaced the tandem pump seal on my car, but an annoying oil leak persists. It seems to be coming from the bottom of the alloy plate with the 5 hex bolts, then dripping onto the plastic corrugated pipe (see attached images).
Has anyone experienced a similar issue with the FSI Turbo engine? I’d really appreciate any advice or suggestions.(https://i.postimg.cc/XYYPpmPd/IMG-6815.jpg) (https://postimg.cc/vcChKqbZ)
(https://i.postimg.cc/q79DDRvx/IMG-6819.jpg) (https://postimg.cc/PLQMPdZC)
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They all do this after a while. You can buy pump rebuild kits off of ebay/amazon and change out all the seals yourself. VW or parts dealers only supply the seal that goes between the pump and the VVT housing as they consider the pump a wear item that should be replaced when it starts to leak.
There's some truth to this because the pump blades wear out internally as well which overtime gets to the point where it doesnt build any vacuum so it's best practice if you just replace the whole pump. you can rebuild it but this only changes the seals. It doesnt fix the wear that's already on the pump housing walls and the pump blades. I'd go with a Pierburg pump if you dont want OE. If you want the cheapest one which is half price of Pierburg, Hella works as well.
Edit: looking at your pictures again, your pump's backplate looks identical to the Hella ones.
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Super thankful for the awesome advice. :smiley:
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They all do this after a while. You can buy pump rebuild kits off of ebay/amazon and change out all the seals yourself. VW or parts dealers only supply the seal that goes between the pump and the VVT housing as they consider the pump a wear item that should be replaced when it starts to leak.
There's some truth to this because the pump blades wear out internally as well which overtime gets to the point where it doesnt build any vacuum so it's best practice if you just replace the whole pump. you can rebuild it but this only changes the seals. It doesnt fix the wear that's already on the pump housing walls and the pump blades. I'd go with a Pierburg pump if you dont want OE. If you want the cheapest one which is half price of Pierburg, Hella works as well.
Edit: looking at your pictures again, your pump's backplate looks identical to the Hella ones.
i checked mine some weeks ago and the OEM is LUK, I would also go for pierburg if LUK is not available.