Knocking noise when idling..

[Daz.]

Read up on this via search but didn't really answer my questions...

About 20 secs after pulling up, stopping theres this knocking noise coming from the drivers side wheel arch, I say wheel arch as you can hear it there without the engine ticking over.

If you rev the car the noise goes then comes back approx 20 secs afterwards again.

This is the replacement engine I had so has had brand new belts fitted less than 500 miles ago, all has been great upto now, just noticed it yesterday and wanted to see if it came back.

Its not a tapping, more deep than that, tap your finger fast on a table using your nail then do it with your finger, its deffo more the finger, the nail is a tappet noise to me!

What do you think? anything scares me with engines at the moment

 

[Daz.]

Also with it only happening on idle is it ok to drive a few miles to a garage if need be?

 

[W111ALG]

Either dephaser or charcoal canister. If its coming from lower down in front of wheel arch it will be the canister.

 

[Daz.]

Its a much stronger noise from the wheel area - how do I unplug this to double check?

 

[W111ALG]

If you take off or loosen the top of the front splashg guard it is a black rectangular canister bout the size of a brick. Theres a couple of connectors at the top.

 

[Daz.]

Bugger does it not plug in somewhere in the bay as a quick test?

 

[mark123]

The black vacuum hose that runs from the plenum by the coil pack, round the upper engine mount goes down to the canister. You could try disconnecting that to test it out but it may mess with you idling as you'll essentially introduce a small leak into the inlet manifold.

 

[Daz.]

Its quite hard to hear, starts when I move from the mount around the arch and back to the pulley area.

What do you think?

 

[Daz.]

Hmmm gonna have to pop to the garage methinks..

 

[Daz.]

Well nipped to my local, said it sounded like the canister to them (I hadn't mentioned anything at this stage)

He said is it empty (fuel)? I must admit it was, he said go and try putting a good load of fuel in and see if its still there...

Well it is Grrr

 

[JD]

Mine had a similar noise fella, took it a garage in Leeds and they replaced a front CV boot joint (as it apparently needed doing) and that solved it :S Might have just been them fiddling around that sorted it though!

 

[Daz.]

On idle? :S

 

[Leeshez]

That sure is loud. I have no idea what it could be.

 

[Gaz_]

Cannister, 100%. Not too expensive either (iirc about £50) no probelm if left though. If you rev it to say 5k, the noise will disappear, then return after 20 seconds or so. Its also alot more apparent in the car than outside.

 

[Daz.]

Cannister, 100%. Not too expensive either (iirc about £50) no probelm if left though. If you rev it to say 5k, the noise will disappear, then return after 20 seconds or so. Its also alot more apparent in the car than outside.

That makes me mucho happy!

Strange how they just go mental though eh?

 

[Daz.]

Just to check do I just need to order a cannister or anything else too?

 

[Daz.]

Struggling to find it on dialogys is it 82 00 151 732 VAC CNT UNIT KO ???

 

[Daz.]

Someone told me the 182 ones are different and better is this true?

 

[Gaz_]

Think the 182 one has a plastic bracket rather than a 172 metal. Totally interchangeable as far as i know! Not sure on the part no though soz

 

[Daz.]

oh right well if it doesn't alter the way it works I'll just use any that comes my way!

 

[franx]

the cannister is also giving the noise some more volume as it passes through. ah well , problem solved eh !?:approve:

 

[Daz.]

Problem solved aye, problem not fixed as of yet

 

[Damo_Sport]

i have the exact same thing. i think mine is the canister too

 

[Ossie87]

What does the cannister do exactly?

I think i might have this, although its very intermittent. Can just hear a knocking noise every now and then from inside the car, but barely hear it from outside.

 

[rich_1989]

I had a knocking noice once on tick over, i took the aux belt off and removed the lower tentioner, then put it back on and noice was gone????

 

[davo172]

i have the exact same thing. i think mine is the canister too

Me too