MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: tommy_a on June 20, 2011, 12:08:43 pm

Title: Nocking on idle - definately not clutch !!
Post by: tommy_a on June 20, 2011, 12:08:43 pm
I think I already know the answer to this but thought I'd ask anyway!

I got in my car (Leon Cupra) yesterday morning and when I started her up there was a rather loud knocking sound coming from under the dash whilst the car was idling. Once I was on the move it went away! I stopped at set of traffic lights and the noise came back. I blipped the throttle and the noise went away. As soon as it settled back to idle it came back!

I've also noticed that if I'm driving along and I put the clutch in the noise appears but is quiet faint! Am I right in thinking that this could be the clutch? Anyone else had a similar experience?
Title: Re: Nocking on idle - possibly clutch?
Post by: derek on June 20, 2011, 07:30:28 pm
Possibly be clutch release or thrust bearing.

I would take it and get it checked out.
Title: Re: Nocking on idle - possibly clutch?
Post by: tommy_a on June 21, 2011, 04:56:09 pm
Cheers for that mate!

I've been trying to find the source of the noise today and I'm thinking it might not actually be the clutch! When I depress the clutch the noise is still there! It seems to be coming from under the center console under the gearstick area! This is leading me to believe it's a knocking/rubbing noise! I've looked but can't find anything! I'm going to jack it up and have a poper look around tomorrow. If I can't find anything it's going back into seat!
Title: Re: Nocking on idle - definately not clutch !!
Post by: tommy_a on June 21, 2011, 09:01:12 pm
right, well in the last couple of hours it seems to have gotten slightly louder !!

on idle there is a loud tapping noise coming from under the dash area (under the car exhaust tunnel/back of engine area). it doesnt sound like a metal on metal noise as its not a tinny high pitch noise more of a dull plastic on plastic noise !!

anyone any ideas or suggestions ??
Title: Re: Nocking on idle - definately not clutch !!
Post by: tommy_a on June 22, 2011, 04:54:29 pm
well it went into Seat today and they found out that a fuel pipe running under the car had come loose !! just glad its sorted now !!  :smiley:
Title: Re: Nocking on idle - definately not clutch !!
Post by: mattchaps on June 23, 2011, 10:36:10 am
Quote from: tommy_a on June 22, 2011, 04:54:29 pm
well it went into Seat today and they found out that a fuel pipe running under the car had come loose !! just glad its sorted now !!  :smiley:

Happy days, the list of possibilities could have been endless! We like a good ending :drinking:
Title: Re: Nocking on idle - definately not clutch !!
Post by: snapey on June 23, 2011, 10:51:00 pm
I've got a similar issue to the one you've described, thank god its something simple. Does anyone know where the fuel line runs? Am I right in thinking its along the offside?

Luke
Title: Re: Nocking on idle - definately not clutch !!
Post by: JackP on June 29, 2011, 06:13:18 pm
iv got exactly the same problem, when idle my car is only running on 3 cylinders (golf tdi), but when any revs are applied it goes back to normal. its a loud and fast tapping noise. an AA guy told me it could be sticking valves so i flushed the oil out and changed it but the noise came back after about 5 minutes of driving. anybody have any ideas what it could be?