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enfield_dinosaur



Member Since: 14 Jun 2015
Location: Tertius orbis
Posts: 120
2007 Defender 110 Puma 2.4 SW Java Black
Vietnam war helicopter noises (?) when starting from cold
Hi folks!

Yes, the title is weird, but that's the way it sounds. When cold and having remained outside for the night, the next morning my Defender sounds very strange. When driving slow, some part sounds similar to a heavy military helicopter from the Vietnam war. A very deep, heavy "bubbabubbabubba". It gets better when driving around for a bit, apparently it's connected to some part warming up. However, it never completely vanishes.

It also apparently does not come from the engine. While the frequency of the strange sound increases if I turn up the revs, the Diesel engine sounds as it should. I had someone from a workshop listen to it, but the car was warm, and the problem did not manifest.

Anyone ever experienced this? What should I check out? (just had the EGR changed, again)


Am grateful for any tips -
Post #521236 5th Apr 2016 6:45pm
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Rosco



Member Since: 03 Dec 2010
Location: Burntwood
Posts: 1868
United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
I get this from time to time an assume it's the viscous fan engaging. Why it engages when cold alludes me 2007 - Stornoway Grey 90 XS SW - Gone
2002 - Black Discovery II - Gone
2014 - Montalcino Red 110 XS SW
Post #521248 5th Apr 2016 7:08pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20775
United Kingdom 
Ancillary drive belt slipping? That may be it.
Post #521253 5th Apr 2016 7:11pm
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gazman



Member Since: 17 Aug 2015
Location: Liverpool
Posts: 652
United Kingdom 2003 Defender 90 Td5 HT Alpine White
my td5 defender and tdv6 disco both make a sound like you describe. I think it's the viscous fan and comes from parking it up with the fan engaged.

I can recreate it by removing and refitting the fan as the 1st start up it is engaged and makes the funny sound for a short while.

I think spinning g the fan by hand also engages it as I had it happen after inspecting the fan blades after pulling a stick out from green laning 2014 - current ..... 2003 defender td5 90 (my car)
2009 - current .... 2005 zx10r
Post #521320 5th Apr 2016 9:33pm
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Alien



Member Since: 18 Jan 2015
Location: Bacchus Marsh
Posts: 230
Australia 
http://daviescraig.com.au/faq#faq-6 Wink Cheers,
Kyle.
Post #521385 6th Apr 2016 2:40am
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Alien



Member Since: 18 Jan 2015
Location: Bacchus Marsh
Posts: 230
Australia 
From the above link...
"My fan clutch makes a loud noise when started cold. Is this normal?"
Yes, most fan clutches allow the fluid to drain into the working area when shut down and engage the clutch. At starts it may take 1-2 minutes for the clutch to slow down.




Stupid phone would not let me edit the first post, grrr.
Moved my post count along though. Cheers,
Kyle.
Post #521386 6th Apr 2016 2:44am
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enfield_dinosaur



Member Since: 14 Jun 2015
Location: Tertius orbis
Posts: 120
2007 Defender 110 Puma 2.4 SW Java Black
Thanks for all the answers! I thought I was the only one with this phenomenon, but with Defenders, even the strange noises seem to be common Mr. Green

Will check the viscous fan when I go out the parking lot in a few minutes...

Thanks!
Post #521413 6th Apr 2016 8:57am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17731
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I usually don't worry until I hear the door gunners open up with the M60s.
Post #521417 6th Apr 2016 9:24am
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Rosco



Member Since: 03 Dec 2010
Location: Burntwood
Posts: 1868
United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
Its hearing Ride of the Valkyries that concerns me Shocked

https://youtu.be/nCU0_QHUO-M

(I'd embed it properly but technology seems to evade sometimes Embarassed ) 2007 - Stornoway Grey 90 XS SW - Gone
2002 - Black Discovery II - Gone
2014 - Montalcino Red 110 XS SW
Post #521501 6th Apr 2016 2:06pm
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enfield_dinosaur



Member Since: 14 Jun 2015
Location: Tertius orbis
Posts: 120
2007 Defender 110 Puma 2.4 SW Java Black
It's solved!

The copper seal on one of the injectors was getting loose, and the injector started to bounce around. Glad we caught the Censored in time!
Post #526599 25th Apr 2016 12:33pm
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