Member Since: 15 Jul 2014
Location: Lancashire
Posts: 703
Just out of curiosity does anyone know if the crankshafts usually fail in the same place?
1997 Defender 90 for the kids and I to have a go at some competitive off road RTV and Tyro trials, daughter picked up her first trophy over the August Bank Holiday.
Previous Land Rover history
1996 P38 4.6 V8 Autobiography
1996 Discovery TDi 300
1972 Range Rover 3.5 V8
LWB Hard Top Series 3
LWB Truck Cab Series 2A
Not been without a Land Rover for over 40 years - I must need therapy!
30th Jun 2016 12:00 am
hgbosch
Member Since: 25 Oct 2010
Location: Pretoria and Zürich, Switzerland
Posts: 188
Hi
of all the snapped cranks I have seen (plenty) they all snap IN EXACTLY THE SAME PLACE
on TDV6 with the auto box. On the TDV6 manual 6-speed, I know of only one and it snapped right at the back. That was caused by abuse.
Even on the new SDV6 3.0 with the 8-speed box this seems to happen. Check here:
The pics posted are where they break, both on 2.7 TDV6 and TDV6 3.0 and SDV6 3.0. Even to the point where you can hold the front part of a 2.7 crank to the rear part of a snapped 3.0 crank and they will be a matching fit. EX AFRICA SEMPER ALIQUID NOVI
SEMPER IN FAECIBUS SUMUS SOLE, PROFUNDUM VARIAT
with kind regards
George Bosch
2005 Disco3 TDV6 S
2003 Range Rover Td6
1998 Disco1 ES 300Tdi (sold)
And some more serious stuff
On the TDV6 manual 6-speed, I know of only one and it snapped right at the back. That was caused by abuse.
Very interesting George; it would be interesting to know:-
If your experience is replicated elsewhere.
If you have any explanation of why more vehiches with auto gearboxes, rather than manual, snap their crankshatfts. Could it simply be a question of more auto D3s than manual D3s?
Regards
NigelAm I Gammon or Woke ? - I neither know nor care.
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
30th Jun 2016 9:45 am
Fatboy Slim
Member Since: 16 Dec 2007
Location: Bridgend
Posts: 197
Does anyone mind if I send these pictures to our failure analysis team? I have a good idea what's caused that but want it confirmed. If anyone has a failed crank they can send me even better.
16th Jul 2016 8:12 pm
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20727
I have an RRS in just now with a snapped crank. Recon engine is being supplied by sponsor MMJ, I wonder if they would allow me to send you the crank My D3 Build Thread
Member Since: 16 Dec 2007
Location: Bridgend
Posts: 197
Definitely a weakness on that oil passage for a start. The beach marks on the breaks show that it's definitely a travelling break but it's difficult to tell the origin from a photo
16th Jul 2016 8:45 pm
Fatboy Slim
Member Since: 16 Dec 2007
Location: Bridgend
Posts: 197
Disco_Mikey wrote:
I have an RRS in just now with a snapped crank. Recon engine is being supplied by sponsor MMJ, I wonder if they would allow me to send you the crank
I can send it back to you once we've looked at it
16th Jul 2016 10:21 pm
MGCarr
Member Since: 15 Jul 2014
Location: Lancashire
Posts: 703
Not pretending to be an expert on this but just putting some ideas out for discussion, if they all fail in the same place and, from the pictures, in a similar manner is the underlying cause;
1) Poor original design?
2) Individual casting faults?
or
3) Some sort of harmonic vibration problem arising from a failing crankshaft damper or out of balance torque converter etc?
Does anyone know if the other vehicles that use this engine in its various guises such as Citroen, Peugeot, Jaguar, etc have a similar incidence of catastrophic crankshaft failure?
1997 Defender 90 for the kids and I to have a go at some competitive off road RTV and Tyro trials, daughter picked up her first trophy over the August Bank Holiday.
Previous Land Rover history
1996 P38 4.6 V8 Autobiography
1996 Discovery TDi 300
1972 Range Rover 3.5 V8
LWB Hard Top Series 3
LWB Truck Cab Series 2A
Not been without a Land Rover for over 40 years - I must need therapy!
17th Jul 2016 1:17 am
Fatboy Slim
Member Since: 16 Dec 2007
Location: Bridgend
Posts: 197
Or a combination of all three!! Breaks from torsional vibration pretty much always have a 45 degree fracture like what is happening here..........need to get my paws on one of these cranks
17th Jul 2016 6:58 am
zoneout
Member Since: 28 Oct 2015
Location: Cape Town
Posts: 39
Fatboy Slim wrote:
Does anyone mind if I send these pictures to our failure analysis team? I have a good idea what's caused that but want it confirmed. If anyone has a failed crank they can send me even better.
Hello Fatboy, I am sure Georgewould be fine with you sending off those photos: I have sent him a PM on our home forum in SA. He may be out of the country or traveling now
Very interested to get whatever info we can on the TDV6 crank breakages.
24th Jul 2016 4:22 pm
Fatboy Slim
Member Since: 16 Dec 2007
Location: Bridgend
Posts: 197
24th Jul 2016 4:32 pm
snapper1
Member Since: 24 Apr 2010
Location: Ormskirk
Posts: 18
Mine is a 15 plate with 21000 miles when it failed, Bank holiday friday, got it back after a week and a half, felf like i had run over something when it happened, asked landrover several times what the cause was, no joy, asking them to extend the warranty on the engine, not getting far there eitherDisco 4 HSE Lux
Series 2A
Series 3 2.6
14th Aug 2016 8:02 am
hugeviking
Member Since: 08 Jun 2010
Location: cotswolds
Posts: 1482
A shot in the dark, but what is the firing order of these engines. Are two pistons next to each other firing consecutively causing stress on one part of the crank.
Andi.
6th Sep 2016 8:11 pm
hgbosch
Member Since: 25 Oct 2010
Location: Pretoria and Zürich, Switzerland
Posts: 188
Crank issues 2005 model
Hi All
just curious to know if anyone has come across a 2004/5 model TDV6 with a snapped crank but with bearings intact?
I personally have never heard of such an incidence, but plenty from 2007 model onwards.EX AFRICA SEMPER ALIQUID NOVI
SEMPER IN FAECIBUS SUMUS SOLE, PROFUNDUM VARIAT
with kind regards
George Bosch
2005 Disco3 TDV6 S
2003 Range Rover Td6
1998 Disco1 ES 300Tdi (sold)
And some more serious stuff
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