07 gt tdi intermittent tappet like noise help please

[boarderianb]

I have an intermittent tappet like noise can go days without anything then comes on hot or cold if I go over a big bump in road sometimes goes again sounds loud like old diesel car strange
Ideas anyone
Thanks

[sean76]

Bump  can anybody help monkey boy here please coz it's driving him mad 

[Zseth]

i would suspect it is your fuel lines knocking against the chassis.  Quite common and an easy fix, search on here to find thread

[doylebros]

No knocking fuel lines on 07 GT  TDI - yes on GTI that would be a good shout!

If your saying it's an engine noise my money would be a faulty injector for the symptoms you've described hot or cold or the tank fuel pump beginning to fail!

[boarderianb]

Cheers will look into it asap

[S4nup]

Had similar issue, turned out to be a worn belt tensioner.

[boarderianb]

Had belt and tensioners done last year could it be this already ?

[S4nup]

Get your alternator clutch pulley checked. I have a similar issue where I had replaced the tensioner and belt, but the noise came back 7-8months later. Realised that the clutch pulley was jammed. This causes extra stress on the tensioner pulley and causes it to wear prematurely. For me the sound is a very pronounced intermittent tappett noise in the cabin. Kinda subsides in neutral and under a little load

[boarderianb]

ok so i looked at the alternator puey today could see any probs there  ?
no noise for a few days then back today eeeergh driving me crazy