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Engine Failure Where to now?
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DL_Disco
 


Member Since: 04 Mar 2021
Location: Ireland
Posts: 71

Ireland 2007 Discovery 3 TDV6 Base 7 Seat Auto Barolo BlackDiscovery 3
Engine Failure Where to now?

Hi
On Thursday after a brief rattle, loss of power I was stopped at the side of the road.

Investigation today revealed broken cam shaft pulley. (pics attached)

What caused this and what are the best solutions.

I have it 2 years new belt and LR Oil Pump fitted 60,000 km ago 2007 315000kms.

Really love the car but don't want to risk this again.

Called three breakers so far and no engines available (not even sure I want to fix /install one)

At the moment I would like to know the cause an likely damage.

Thanks

Click image to enlarge


Click image to enlarge
  
Post #233044618th Mar 2023 3:31 pm
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SteveNorman
 


Member Since: 14 Oct 2005
Location: Somerset
Posts: 1144

United Kingdom 

I would suspect cam stopped, due to perhaps chain issues, or seized cam, which then broke the pulley.
I would take the cam cover/inlet manifold off & investigate.
My guess is it's terminal.

regards
Steve
  
Post #233044818th Mar 2023 3:50 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

This seems to be a common problem i have seen lots of simular photos.

I havent investigated any to find the cause but i know you are going to have a least a number of bent valves, you would have to remove the heads to see if any pistons are damaged if they are ok you may get away with fitting a couple of second hand heads.
 Andrew

D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE 
 
Post #233045018th Mar 2023 4:10 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20731

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

Seen a few of these now. Cams weren't seized

Almost like metal fatigue of the pulley. But then that doesn't explain why some have done 300k miles without issue
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #233045718th Mar 2023 6:38 pm
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Mouse-Simon
 


Member Since: 24 Feb 2020
Location: Scotland
Posts: 28

United Kingdom 2007 Discovery 3 TDV6 GS Auto Java BlackDiscovery 3

As my engine is stripped down Ihave just replaced both of my wheels. I did wonder if historically POs might have relied on the timing pin tools to lock the engine when removing the bottom crank front bolt and this could of affected them? Either way for what new ones cost I didn't think long about that change decision. I hope you get sorted out soon👍
 D3, D2 and RRS owner 😱  
Post #233049919th Mar 2023 8:20 am
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DL_Disco
 


Member Since: 04 Mar 2021
Location: Ireland
Posts: 71

Ireland 2007 Discovery 3 TDV6 Base 7 Seat Auto Barolo BlackDiscovery 3

Thanks
Just spotted the fatigue on two of the pulley legs
Anyone know if I can take the head off without removing engine?
  
Post #233051119th Mar 2023 10:30 am
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Philw1
 


Member Since: 31 Jan 2023
Location: boston lincs
Posts: 71

United Kingdom 2005 Discovery 3 TDV6 SE Auto Tonga GreenDiscovery 3

Mouse-Simon wrote:
As my engine is stripped down Ihave just replaced both of my wheels. I did wonder if historically POs might have relied on the timing pin tools to lock the engine when removing the bottom crank front bolt and this could of affected them? Either way for what new ones cost I didn't think long about that change decision. I hope you get sorted out soon👍




I think you may have hit it on the head there people just relying on the pin to undo the crank , it takes a bit of grunt to undo the crank pulley .
  
Post #233057019th Mar 2023 10:57 pm
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DL_Disco
 


Member Since: 04 Mar 2021
Location: Ireland
Posts: 71

Ireland 2007 Discovery 3 TDV6 Base 7 Seat Auto Barolo BlackDiscovery 3

Hi
I've the cam cover off, some cam bolts sheared.

can I remove the cam shafts without removing the vacuum pump.
  
Post #233690717th May 2023 11:10 pm
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Tara
 


Member Since: 05 Jan 2024
Location: Perth
Posts: 1

Australia 

Hi, same thing happened to our 2010 RRS, damaged valves etc, currently reviewing options and gathering info on historical camshaft pulley metal fatigue failures.



  
Post #23577425th Jan 2024 2:58 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4655

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

DL_Disco wrote:
Hi
I've the cam cover off, some cam bolts sheared.

can I remove the cam shafts without removing the vacuum pump.


No, the pump is cam driven so has to be removed first. It might be worth considering head removal?

These sprockets seem to be weakening with age or perhaps incorrect belt tension. Had one like this last year, same sprocket.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #23577435th Jan 2024 4:45 am
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loanrangie
 


Member Since: 18 Jun 2017
Location: Melbourne
Posts: 600

Australia 2008 Discovery 3 TDV6 SE Auto Stornoway GreyDiscovery 3

Mouse-Simon wrote:
As my engine is stripped down Ihave just replaced both of my wheels. I did wonder if historically POs might have relied on the timing pin tools to lock the engine when removing the bottom crank front bolt and this could of affected them? Either way for what new ones cost I didn't think long about that change decision. I hope you get sorted out soon👍


Would have to be some kind of moron to do that, the majority use the flywheel locking pin or at the least a tool that holds the crank pulley before undoing that bolt.
The bolts on the pulleys arent that high a torque so i'd just put it down to fatigue.
  
Post #23579417th Jan 2024 4:41 am
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