All Things Mk5 > How to Guides / Troubleshooting
FSI vacuum pump
Pissat4motion:
Is anyone having success with replacing the seal/rubber o ring?
Car's an 07.. Revision E I believe. Replaced the ring and still had a leak. Bought a revision G pump, used, replaced the o ring, installed and it leaks even worse.
Is the only remedy replacing the pump with new? Or am I doing something wrong?
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muff1991:
You need to get the RKX (assuming this is the same as the TFSI) I don’t mine and hasn’t once tried to leak.
This is what I got:
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F232205692818
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muff1991:
Sorry, I meant to say... don’t buy a new pump... if yours is the same pump as the TFSI 2.0T then get this one and it’ll save you loads of money.
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Chesto18:
It’s the rubber seal behind the flat plate (covered with the small torq screws) that leaks. Mine was leaking badly, so tried adding a little gasket sealant. Helped, but still leaked and then got progressively worse.
Removed all the gasket sealant and gave it all a good clean up, carefully resat the rubber seal with a touch of grease and retorqued all the screws properly and I haven’t had an issue since.
It will probably leak again but who knows when. VW won’t sell you this seal, you have to buy a new pump, but there are repair kits on American eBay that sell the seal included.
muff1991:
--- Quote from: Chesto18 on March 10, 2019, 08:04:18 pm ---It’s the rubber seal behind the flat plate (covered with the small torq screws) that leaks. Mine was leaking badly, so tried adding a little gasket sealant. Helped, but still leaked and then got progressively worse.
Removed all the gasket sealant and gave it all a good clean up, carefully resat the rubber seal with a touch of grease and retorqued all the screws properly and I haven’t had an issue since.
It will probably leak again but who knows when. VW won’t sell you this seal, you have to buy a new pump, but there are repair kits on American eBay that sell the seal included.
--- End quote ---
Yeah that’s exactly where mine was leaking from chesto, they all leak from there, 3 of us have all repaired the same leak using the American RFX kit and I can safely say 2 of us are still leak free ;-) the 3rd got a new engine so I can’t say how his got on in the end. But was good while he had it.
You’re right, vw will only sell the complete pump, I wasn’t paying hundreds to basically replace an O ring lol.
RKX kit all the way
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