DISCO4.COM - View topic - tick, tick, tick on overrun

al cope

Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10303

tick, tick, tick on overrun

I've noticed a tick, tick, tick (similar to a ticking tappet) which occurs after I've lifted off, but only when going downhill (so no load), still in drive. It doesn't do it every time, and sometimes is much loader than others. I cant replicate it other than how I've described it above. On one occasion I thought it stopped when I touched the brakes, but now I'm not so sure. It changes with road speed (faster speed, faster ticks). Its been there for a few months now, and I'm not sure if i should be worried about it, but trying to get something fixed that you cant quite explain to a LR service receptionist is like betting on England to win the world cup (it ain't gona happen!)

Ideas??

Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD

21st Jun 2010 1:31 pm

Navigator

Member Since: 17 Mar 2010
Location: Stay at Home. One of the lives you save could be your own.
Posts: 5106

2015 Discovery 4 3.0 SDV6 SE Auto Causeway Grey

A stone stuck in brakes should have cleared by now, so I suspect a failing CVJ. Â£Â£Â£Â£

A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.

21st Jun 2010 1:34 pm

JF Lux

Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

2008 Discovery 3 TDV6 HSE Auto Java Black

the answer had better be "its normal" because I have had this for as long as I can remember...

never thought anything of it... The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..."

21st Jun 2010 1:35 pm

al cope

Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10303

wouldnt I have a clonk on full lock at low speed if a CVJ was going ? (seen this on our pug 206)

Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD

21st Jun 2010 1:39 pm

tombuidhe

Member Since: 04 Jan 2008
Location: starving in the belly of the whale
Posts: 113

2006 Discovery 3 TDV6 SE Auto Java Black

I've had this since the car was new - I've been told it's only on Euro 4 models. It can be very irritating but I've found that if I turn the music up a notch or two I can't hear it

For I am a raindog too.

21st Jun 2010 2:08 pm

Navigator

Member Since: 17 Mar 2010
Location: Stay at Home. One of the lives you save could be your own.
Posts: 5106

A "clunk" when most or all the balls are worn or broken, so that the casting on one side hits casting on the other. If one ball only is damaged then a "tick" as the two ends move more than they should as that ball is not there.

If it is a bearing in the hub it should be noisy under most conditions. As the balls are smaller and there are more of them the noise is lower in tone, more of a rumble than a tick. You (or dealer) will start to be able to feel play with the wheel jacked off the ground. A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.

21st Jun 2010 2:13 pm

Gareth
Site Moderator

Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26714

I have heard this too! Its very faint, happens a couple of seconds after lifting off the accelerator, and ticks about twice a second, for about 5 seconds then goes away, until the next time you lift off.

Mine has always done this. I really have no idea what it is, but I suppose it could be the brake booster vac pump, or an egr valve working?

21st Jun 2010 2:14 pm

al cope

Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10303

mine is a euro 4 engine (09 model), its just that it seems more noticeable of late, and IMHO the more I notice something, the more likely its getting worse.

Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD

21st Jun 2010 3:27 pm

bambi

Member Since: 10 Apr 2009
Location: south yorkshire
Posts: 2059

Possible diesel knock, if they all do it, try putting in neutral and see if it is constant to road speed or engine, or little ends rattling, probably down to emissions, on the fuel mix and a touch of pre ignition.

21st Jun 2010 5:04 pm

jojim65

Member Since: 05 Dec 2008
Location: Barton on sea, Hampshire
Posts: 440

2009 Discovery 3 TDV6 HSE Auto Buckingham Blue

This sounds familar, I have had the same, sounded like a dodgy tappet and started on the overrun at about 40mph, again went when I braked but wasn't brakes.

Had it checked out by LR and no fault found. This all happened with 2-3000 miles on the clock but now at 11000 no noise at all. Weird...

21st Jun 2010 5:20 pm

al cope

Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10303

I'm at 17000 miles, and I'm sure it didnt start doing this until 14 or 15k miles.

Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD

21st Jun 2010 5:31 pm

Gareth
Site Moderator

Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26714

Mine is 08.5 euro 4, and its now on 45k, it has done it as long as I can remember.

Its going to GS Stockport for a service on Wednesday, so I will ask them to have a listen.

21st Jun 2010 5:34 pm

al cope

Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10303

cheers Gareth - let me know if its something I need fixing

Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD

21st Jun 2010 5:42 pm

DaveT

Member Since: 01 Aug 2005
Location: Cornwall
Posts: 2572

2016 Discovery 4 3.0 SDV6 Landmark LE Auto Indus Silver

Wierd! i noticed this on mine yesterday. Nice weather, window open, on over-run down hill.
Sounded just like ONE tappet & pretty loud. It increased in frequency as the speed increased down hill, but can't say whether this was related to speed or RPM. It stopped immediately on acceleration.

Can't hear anything with the car stationary on tickover.

Mine is an 08MY manual, 79k miles, 5k since service, oil level is fine. Long succession of Disco's since 2001...
SIII Lightweight - neglected & rusting. Bulkhead, A panels, vent panel & outriggers now disintegrated - Next years project!

21st Jun 2010 9:43 pm

Divlar

Member Since: 10 Sep 2008
Location: West Midlands
Posts: 221

2016 Discovery 4 3.0 SDV6 SE Auto Indus Silver

I have also noticed a tick as you describe but only on start up when I have the door open. It ticks 5 or 6 times then thats it, don't hear anything after that? I have always had a scraping/ wooshing sound on overrun which I have assumed is the turbert doing something?

22nd Jun 2010 8:29 am