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Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

2011 Defender 110 Puma 2.4 DCPU Baltic Blue

2.4 "clacking"!

I have a 2.4 TDCi in my 2011 110 defender... I have owned it a couple of years or so now and already had a MAF sensor, MAP sensor, SCV, PRV, blanked EGR and a remap. It was running sweet until a few weeks ago when it started making a "clacking" noise. Only does it when driving, nothing when sat still at any revs.
It burns no oil, starts on the button and when cold from overnight produces a small amount of blueish white smoke for about a minute. When it's cold it sounds fine, a few minutes after it's up to temperature it starts to make a clacking noise when at neutral revs. If you accelerate hard it sounds better and off the throttle it sounds fine but in traffic or just holding a moderate speed it sounds like a tractor! The longer you drive the worse it sounds. Even after a reasonable time cooling down it still sounds bad, it gets so bad that people turn and look to see what's coming.
I have had the cover off and the injectors are tight but look slightly moist around the seal at the base, I can't say wet, but definitely not dry.
One garage just said "they all sound like that", the other said " it could be the injectors but don't want to mess with them".
I'm very frustrated as I know how it used to sound but it doesn't now! It still runs well but generally sounds a little noisier than normal even when it's not "clacking".
It doesn't seem to be giving the normal symptoms of failing injectors or seals, there is no chuffing sound or gasses from rocker cover. I have got it booked into an injector specialist early next week just to rule them out but it's getting louder and I think it might fail before then! What do failing big or little ends sounds like or camshaft, or oil pump?

I'm beginning to think I will have to let it break to find out the cause!

Any pointers gladly accepted.

30th Mar 2017 3:30pm

zsd-puma

Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

2010 Defender 110 Puma 2.4 USW Santorini Black

Have you tried the old trick of putting a screw driver on various components and listening to the end of it? (automotive stethoscopes are cheap too) If it is a vac pump of something then that will help you pin point it.

Does it go quiet when you depress the clutch pedal?

30th Mar 2017 4:25pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

It doesn't do it when sat still. only when driving. No difference with clutch in or out

30th Mar 2017 5:04pm

zsd-puma

Member Since: 09 Aug 2016
Location: Kent
Posts: 2720

Ahh ok, that kind of suggests it's a problem in the drive train rather than engine related.

30th Mar 2017 5:30pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

No, definitely in the engine somewhere, it only happens under load and at certain revs.

30th Mar 2017 5:40pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Output shaft main gear box

http://www.defender2.net/forum/topic46497.html

30th Mar 2017 5:48pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

I've got the ashcroft upgrade, fitted with new clutch in 2015.
I've got a wav file that you can just about hear it on, cant figure how to add it here but it's in my gallery.

30th Mar 2017 6:11pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Ok cross that one off the list

stones in between brake disc and shield

30th Mar 2017 6:23pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

No, that would make a noise when moving with or with out engine. Have a listen to the wav, it's fairly obvious if you listen a couple of times and filter out the normal Defender din!

30th Mar 2017 6:30pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

https://www.defender2.net/gallery/albums/u...0Clack.wav

30th Mar 2017 7:05pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

I hate to say it sounds ok i me

30th Mar 2017 7:09pm

Pinky

Member Since: 09 Jun 2016
Location: England
Posts: 210

You wouldn't say that if you were driving it! People in the street are turning round to see what's making so much noise

30th Mar 2017 7:18pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

trouble is my heading tuned to TD5 defenders

30th Mar 2017 7:21pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

if you place transfer box in neutral make same sound ?

a frame ball clacking then drive off

also are all prop shaft UJ ok

30th Mar 2017 7:37pm

Dieselhead

Member Since: 21 Oct 2012
Location: Pulborough. West Sussex
Posts: 552

Timing chain??

Must be something loose? Chris

2008 XS 110 2.4 Utility. Tonga Green
1953 Series 1 for restoration
1983 Mini Mayfair
2004 VW T5 Camper
2008 Diahatsu Sirion. Thats hers
Classic Bolens Garden Tractors

30th Mar 2017 8:28pm

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