Member Since: 06 Jun 2015
Location: Renfrewshire
Posts: 24
Strange engine noise ( tdv6 )
Right I have a strange one here. I have a ticking sound coming from what sounds like the front off side of the engine. It dose not sound like it's there when the engine is cold and only appears to happen once the engine is up to temp. The sound ether stops or gets quieter when you lift the rpm up to 1500rpm and dose not sound like it gets faster or slower with rpm.
I have had a well known mobile Land Rover specialist that frequents this forum to take a look and he has never came across this issue.. I have removed the aux belt to rule out all the pumps and tensioners. Disconnected the egr's and changed oil and filters. None of which has given me a clue to what's causibg the sound. Next thing is to open the timing cover to see if there's anything wrong behind there even tho it dose not sound like a tensioner.
It dose not sound like a bottom end knock as its to quiet and more of a tick than a knock and it dose sound like its ticking in cycle with the engine.
Anyone got any ideas?
24th Jul 2015 8:03 pm
IOM man
Member Since: 03 Nov 2013
Location: Peel
Posts: 303
My cam belt was starting to shred and was making a strange ticking noise
Two mechanics including me had a look at it and we were convinced it was a cam follower
I removed the cam cover and found this
Current:
2010 Discovery 4 HSE TDV6
2020 Audi Q2 TSFI 40 Aline Quattro Black Edition
2006 Audi RS4 4.2 V8 - Toy in the garage
Gone but not forgotten:
2006 Range Rover Sport HSE TDV6
2018 Lexus NX 300 F Sport Hybrid
2005 Discovery 3 HSE TDV6
2015 Discovery HSE Lux
200 Discovery TDI
300 Discovery TDI
Land Rover 90 2.5 Diesel
Series III SWB Land Rover 2.25 diesel
TD4 Freelander Kalahari
1.8 petrol Freelander
24th Jul 2015 8:19 pm
Neildisco300
Member Since: 06 Jun 2015
Location: Renfrewshire
Posts: 24
I came across a thread maybe yours that said that. That's why I am going to remove the cover. It's had its belts done last year so would be surprised if the belts going like yours.
Did yours get affected by heat or rpm?
24th Jul 2015 8:28 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20836
It did sound like a noisy tappet, and the belts have been replaced previously...My D3 Build Thread
Member Since: 03 Nov 2013
Location: Peel
Posts: 303
My belts were changed 18 months ago, the only fault I could find that could have caused the belt to shred was the idler pulley before the right hand cam shaft sprocket had very slight play in it, this possibly caused the belt to move of center so it was rubbing against the up stand on the right hand cam sprocket
My tick wasn't often enough to be a follower or small end, and when I found the split in the belt it explained the slow frequency of the tick as split had further to travel around all the pulleys, if that makes sense
Worth checking the belt to rule it out Current:
2010 Discovery 4 HSE TDV6
2020 Audi Q2 TSFI 40 Aline Quattro Black Edition
2006 Audi RS4 4.2 V8 - Toy in the garage
Gone but not forgotten:
2006 Range Rover Sport HSE TDV6
2018 Lexus NX 300 F Sport Hybrid
2005 Discovery 3 HSE TDV6
2015 Discovery HSE Lux
200 Discovery TDI
300 Discovery TDI
Land Rover 90 2.5 Diesel
Series III SWB Land Rover 2.25 diesel
TD4 Freelander Kalahari
1.8 petrol Freelander
24th Jul 2015 8:37 pm
IOM man
Member Since: 03 Nov 2013
Location: Peel
Posts: 303
I thought it was a noisy follower on mine and so did the other mechanics including a LR mechanic
This one maybe something different but it's worth checking the belt first
Finger crossed it's an easy fixCurrent:
2010 Discovery 4 HSE TDV6
2020 Audi Q2 TSFI 40 Aline Quattro Black Edition
2006 Audi RS4 4.2 V8 - Toy in the garage
Gone but not forgotten:
2006 Range Rover Sport HSE TDV6
2018 Lexus NX 300 F Sport Hybrid
2005 Discovery 3 HSE TDV6
2015 Discovery HSE Lux
200 Discovery TDI
300 Discovery TDI
Land Rover 90 2.5 Diesel
Series III SWB Land Rover 2.25 diesel
TD4 Freelander Kalahari
1.8 petrol Freelander
24th Jul 2015 8:40 pm
Neildisco300
Member Since: 06 Jun 2015
Location: Renfrewshire
Posts: 24
Disco_Mikey wrote:
It did sound like a noisy tappet, and the belts have been replaced previously...
Would tend to agree but would think it would make the noise all the time if it was a tappet/lifter.
Will try and get the cover of over the weekend and see what I find
24th Jul 2015 8:50 pm
CUCO
Member Since: 26 May 2011
Location: Spain & Oleee!!!
Posts: 609
Chain guides and or tensioners? Common on double over head camshafts 1 pulley engines were in low pressure situation (idle, warm engine) chains moves and creates the ticking sound.
25th Jul 2015 6:23 am
Neildisco300
Member Since: 06 Jun 2015
Location: Renfrewshire
Posts: 24
it can't be a chain moving as there is only a belt. If it is a lifter dose that require surgery or can it be left. If it fails will it destroy my engine?
25th Jul 2015 12:50 pm
IOM man
Member Since: 03 Nov 2013
Location: Peel
Posts: 303
It's a double overhead camshaft - 2 cams within each cylinder head of the V6 - total 4 cam shafts
The cam belt drives the first cam shaft and within the cam cover a chain powers the second cam shaft - the chain tensioner can fail and was something I was considering when diagnosing my tick
Mike will hopefully give you advice on changing the hydraulic followers as I never got that far - they aren't that expensiveCurrent:
2010 Discovery 4 HSE TDV6
2020 Audi Q2 TSFI 40 Aline Quattro Black Edition
2006 Audi RS4 4.2 V8 - Toy in the garage
Gone but not forgotten:
2006 Range Rover Sport HSE TDV6
2018 Lexus NX 300 F Sport Hybrid
2005 Discovery 3 HSE TDV6
2015 Discovery HSE Lux
200 Discovery TDI
300 Discovery TDI
Land Rover 90 2.5 Diesel
Series III SWB Land Rover 2.25 diesel
TD4 Freelander Kalahari
1.8 petrol Freelander
25th Jul 2015 1:11 pm
DN D3 Decade
Member Since: 23 Jun 2006
Location: W.London.
Posts: 2344
The cam belt drives one pair of cam shafts, which in turn drives the second pair of cam shafts, via chains, EDIT....as said above ^^ these, or the tensioners can fail ....If you suspect 'lifter' noise and it is not excessive, it could go on for ever ( well, as long as the engine lasts ), it won't destroy the engine, although there are a few other items that might. D3 owned from new, P017 brake recall, BAS FBHIC, new FBH, LR013487 oil pump, new water pump. RRS front lower suspension arms. New suspension compressor/ relay. New Denso alternator. CuNifer rear brake pipes. New GKN rear propshaft. New HPFP belt & tensioner. New A/C Condenser.NO WARRANTY for many many years.
25th Jul 2015 1:13 pm
Rich84
Member Since: 25 Jun 2013
Location: South Australia
Posts: 238
It might be worth checking the bearings in the roller cam followers for excessive play.
If it gets bad enough, the roller disintegrates and sends what is left of the needle bearings through the engine.
The cam chain tensioner would be another place to look. Notorious on VW and Audis, not so much on these LRs from what I've seen.2008 RRS TDV6 - Chawton White/Black/Lined Oak - 20's, h/k, sunroof - 350K KM.
2010 Audi A6 3.0T S-Line - Phamtom Black/exclusive 2-tone valcona 184K
2000 Audi A4 avant 1.8t Q Sport - Phantom Black/black 385K KM
1990 Nissan Pintara TRX - red - lots of mods - 439K KM
26th Jul 2015 11:47 pm
Neildisco300
Member Since: 06 Jun 2015
Location: Renfrewshire
Posts: 24
Well after a lot of digging about, removing parts and banging my head of a brick wall I found out wat my problem was.
It turned out to be the oil pump clicking, possibly the pressure release valve so quick call to our friendly and helpful mobile disco specialist disco Mikey to arrange a visit for him to change the pump and timing belt at the same time.
Few hours later and it was done. The man dose not hang about.
27th Sep 2015 8:05 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Did you get the oil pressure tested?Land Rover - Turning Drivers into Mechanics Since 1948
I had a tappet type nose that would come and go, more so when engine was warm. My answer was EGR valve. Even though they where blacked they were still trying to function. I only found out when I on pluged them and it stopped. Hope this might help
Dave
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....If you suspect 'lifter' noise and it is not excessive, it could go on for ever ( well, as long as the engine lasts 
), it won't destroy the engine, although there are a few other items that might. 
