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Model specific boards => Golf mk5 => Topic started by: gazbutmk5gti on 12 April 2008, 11:35

Title: Fuel pump issues
Post by: gazbutmk5gti on 12 April 2008, 11:35: Ok, without wanting to make anybody panic, was over at Awesome yesterday chatting to Jim about the new APR fuel pump and he raised a few concerns regarding the fuel pump on the Tfsi engine.
Basically the fuel pump runs off the end of the camshaft as we know, the plunger from the pump sits in a bucket which runs directly onto the camshaft, these buckets have been showing premature wear which can and has lead to damage to the camshaft. He has seen this problem on cars with as little as 18000miles on them, in fact on their demo car, which has about 25k on it I think, the bucket has worn through damaging the camshaft which now needs replacing.
This is something you need to keep on eye me thinks, wonder if VW will have a recall or inspection?
Title: Re: Fuel pump issues
Post by: Hurdy on 12 April 2008, 11:46: Did Jim say anything as to whether the APR pump rectifys this and so makes it a fit and forget mod?
Title: Re: Fuel pump issues
Post by: gazbutmk5gti on 12 April 2008, 11:49: No, the bucket isn't actually part of the pump its a seperate item. The bucket will be checked when the new pump is fitted and replaced if necessary, there about 16quid.
Hopefully VW will bring out an updated item thats a bit harder wearing
Title: Re: Fuel pump issues
Post by: Hurdy on 12 April 2008, 11:57: Hmm, sounds like an ideal candidate part for cryogenic treatment :cool:

http://www.195below.co.uk/index.html?gclid=CIjrl7Wu1ZICFQdtMAod2EvZ7A
Title: Re: Fuel pump issues
Post by: john_o on 12 April 2008, 23:50: !
Any idea if this effects all model years?
Do we have to get it checked regularly then?
I would hate to get a remap , then need a new camshaft and vw refuse to do it under warranty (assuming they could prove)

cheers for the heads up Gaz

(hows the new map?)
Title: Re: Fuel pump issues
Post by: topher on 13 April 2008, 01:31: Engine wear on their demo car producing 170bhp more than its supposed to? shocking! :grin:
Title: Re: Fuel pump issues
Post by: vRStu on 13 April 2008, 11:06: VW America have had a tech bulletin out for quite some time (not sure on UK) about CAM wear, the original ones were one piece and the newer and harder ones are two piece.

Some people say it is made worse by the fitting of an APR/KMD/Autotech fuel pump but failures are equally as common on the OEM pumps as well.

I am running an Autotech Pump so I'll be inspecting mine and another car this week I expect. I bought a spare follower just in case which is around Ã‚£20.

Quote
Technical Background
Excessive wear of intake camshaft lobe that drives the high pressure fuel pump. The wear limits maximum pump piston lift, causing fuel rail pressure fluctuations. The wear on the camshaft lobe can also lead to wear on the base of the high pressure fuel pump cam follower.

Quote
Production Solution
Increase surface hardening of camshaft lobe for the high pressure fuel pump
Improved intake camshafts have Part No. 06F109101B.

Here are some pics from other sources that I've been reading.

Cam Follower -

(http://i2.photobucket.com/albums/y38/eastcoastminiz/011-4.jpg?t=1206288861)

Early Cam -

(http://moeuro.com/espacePrive/magilson/cam_side.JPG)

Revised Cam -

(http://img.photobucket.com/albums/v704/hardwired71/Cam003.jpg)
Title: Re: Fuel pump issues
Post by: 182_blue on 13 April 2008, 11:11: when was this revision ?
Quote from: vRStu on 13 April 2008, 11:06
VW America have had a tech bulletin out for quite some time (not sure on UK) about CAM wear, the original ones were one piece and the newer and harder ones are two piece.

Some people say it is made worse by the fitting of an APR/KMD/Autotech fuel pump but failures are equally as common on the OEM pumps as well.

I am running an Autotech Pump so I'll be inspecting mine and another car this week I expect. I bought a spare follower just in case which is around Ã‚£20.
Title: Re: Fuel pump issues
Post by: gazbutmk5gti on 13 April 2008, 11:12: Quote from: john_o on 12 April 2008, 23:50
!
Any idea if this effects all model years?
Do we have to get it checked regularly then?
I would hate to get a remap , then need a new camshaft and vw refuse to do it under warranty (assuming they could prove)

cheers for the heads up Gaz

(hows the new map?)

Maps good cheers John, feels really strong in the midrange and pulls really well at the top.
Regular checks are a must IMO, by the way Awesome are getting their car fixed under warranty by VW
Title: Re: Fuel pump issues
Post by: vRStu on 13 April 2008, 11:19: The TSB is June 07.
Title: Re: Fuel pump issues
Post by: neg on 13 April 2008, 11:50: So is there only one version of the Cam follower (bucket bit) and they revised the actual CAM in the later models? Wondering if its worth asking the dealer to check or just get one fitted myself for the sake of Ã‚£20 ...
Title: Re: Fuel pump issues
Post by: vRStu on 13 April 2008, 11:57: Cam follower is 06D 109 309 C
Title: Re: Fuel pump issues
Post by: john_o on 13 April 2008, 12:58: some nice info there thanks VrStu
Do VW check this proactively?
rather than let the wear destroy the cam? not to mention the swarf then floating around!

thanks Gaz , good to hear :-) after the honeymoon my car will go into Awesome for the remap

Would love to see the service techs face when working on the Awesome car lol
'Has this car been modified sir?' - :grin:
Good to see some dealers are workable.

John
Title: Re: Fuel pump issues
Post by: vRStu on 13 April 2008, 13:18: As far as I know it wouldn't be checked as a matter of course but only if the relevant fault codes are stored.