What is this noise?

**dmdigital** · 3rd January 2010, 06:41 PM

OK can anyone tell me what this noise from my Puma is?

[ame="http://www.youtube.com/watch?v=WoPvoSkR26Y"]YouTube- Strange Engine Noise[/ame]

Here are the symptoms:

It always gives 5 distinct clonks after the engine stops
If you immediatly turn the ignition ON again at time of stopping it doesn't do it. This would suggest it is electronic.
It does occassionaly give one of clonk noise when running (this is heard on the video at about 40sec mark)
There is no noticable problem with the engine, turbo etc.
There are no fault codes (DTC's) logged.
It's been like this now for over three months and is "somewhat" annoying.

I'm wondering if it is the waste gate but it appears to be coming from the passenger's side rear of the engine (possibly from the area shown in the first part of the video).

**justinc** · 3rd January 2010, 06:45 PM

Derek, I'm not sure but it may be an EGR valve self clean or something like that, can't hear it on this PC and I'm not even sure the Puma has one, but could be something similar.

JC

**dmdigital** · 3rd January 2010, 06:49 PM

Originally Posted by justinc

Derek, I'm not sure but it may be an EGR valve self clean or something like that, can't hear it on this PC and I'm not even sure the Puma has one, but could be something similar.

JC

Thanks Justin, I'm sure the Puma doesn't have a PC like yours

Yes EGR is another possibility. I'm hoping someone else has actually encountered this.

**Grockle** · 3rd January 2010, 06:50 PM

thats certainly a strange noise Derek,a new one on me,try Def 2 I bet someone on their has had it happen,good luck

ps get that engine bay cleaned no excuse

**dmdigital** · 3rd January 2010, 06:51 PM

Originally Posted by Grockle

thats certainly a strange noise Derek,a new one on me,try Def 2 I bet someone on their has had it happen,good luck

ps get that engine bay cleaned no excuse

Already done. I'm hoping Pete or someone has encountered this.

As for the cleaning, most of that red dirt won't come off

**The ho har's** · 3rd January 2010, 07:00 PM

sounds like someone elses chipmonks have moved into you defender

Mrs ho har

**stig0000** · 3rd January 2010, 07:16 PM

the tdv8 makes that sound to , im not 100% certen what it is but its soming to do with the egr sys, or the vnt on the turbo,, it self tests after the engine stops,

but what ever it is,, that is way way to loud, and sounds dry and needs lube atleast and probs replacment

**dullbird** · 3rd January 2010, 07:29 PM

I can tell you now ours doesn't sound like that AT ALL

**dullbird** · 3rd January 2010, 07:32 PM

Ian said he would take a wild guess at the ABS pump.....he reckons he has heard that noise on ours but it was very very quite nothing like you have (i cant say I have heard it at all and I drive the car the most)

but it has a kind of rubbery sound to it

**dmdigital** · 3rd January 2010, 07:35 PM

Don't think it's the ABS pump sound is coming from a different location to the pump.

Yes, your's would sound almost like a new one

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