1.9 TDI PD Tandem pump rebuild / repair (fuel & vacuum pump) VW Touran

Step by step guide on how to rebuild / reseal the Tandem pump on this 2005 1.9 TDI PD Volkswagen Touran. This job can need doing for various reasons. Non start, running issues, vacuum issues , fuel in the oil / oil in the fuel etc.

Tools used :

Diagnostic machine I use:

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[DomX]

As others have said, this is a great instructional video for tearing down and building back up the tandem pump - thank you

[ariantaria]

Well explained, is very easy to understand your repair videos, fairly easy repair job, thanks for your content,

[jonathanleblanc]

Going to do this tomorrow. Fantastic descriptions and instructions. Really appreciate you posting this.

[fTLuckyz]

Thank you for the help with this video. It helped me a lot! Everything super clean :D

[timothywschmidt]

Well done. Helped me a bunch, and saved me a ton of money I would have spent on a new one. Thank you, and keep up the good work. Is there a known torque spec for a nip, or just a bit? LOL. Just kidding, thank you.

[NN-xujw]

Nice video. Why not buy a new one ( aftermarket ) ? Al the work that you put in it.

[pakozdizsolt]

There are no factory instructions or gaskets available for repairing this part. The factory instructions require replacement in case of failure. The problem is, you can't check to see if you've got a tight seal between the engine oil and the fuel compartment. If there is even a small leak, fuel goes into the engine oil, dilutes it, you don't notice it and trouble ensues.
(Crankshaft, hydraulic cylinder, bearing)
Don't get me wrong, I'm not writing this from bad motives, my own experience.

[jasonboi]

Thanks for this! mech told me my vac pump is leaking oil. It’s been hard to start for a while too, I was thinking it might be fuel pump non return valve failing but looks like it’ll be the vac pump. Got a stiff pedal too so all my seals must be shot! I’ve got low pressure to my turbo too, mech said it’s 300 when it should be 500 (Don’t know what unit he said). Wastegate is well noisy, it’s over boosting and has some hesitation, would you think this could all be down to the vac pump too? It’s just had a new n75

[Charlie]

Thanks for the upload, my 1.9 tdi oil sump is filling rather rapidly with diesel, besides the injectors do you know if a bad seal/gasket on the tandem pump can let it in that way ?

[dunebasher]

Do you need to relieve fuel pressure before removing the fuel hoses?

[Nazmm]

if its only a a tiny leak of oil and fuel. do you still recommend opening the internals to do all the little bits? or would the outer main gaskets be enough.. no other fuelling issues with pressure etc

[realjiver]

I've noted that, the repair kit for the1.9 PD 8 hole tandem pumps don't include those small springs. Is that because they are not necessary?

[diesel]

How do you feel about the Bosch “upgrade” over the old LUK pump?

[garyparker]

So which part or seal actually fails in those tandem pumps