Home > Technical (L322) > Why TDV8 turbos fail |
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Gazellio @ Prestige Cars Member Since: 22 Jan 2010 Location: Chilterns, UK Posts: 11309 |
I believe Turbo failure is MUCH more common in the RRS. Should this be mentioned above? |
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3rd Mar 2015 1:51pm |
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RRG Member Since: 08 Jan 2010 Location: London Posts: 124 |
Gaz, by 'MUCH' can you offer some quantification?
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3rd Mar 2015 2:07pm |
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Gazellio @ Prestige Cars Member Since: 22 Jan 2010 Location: Chilterns, UK Posts: 11309 |
I don't have figure but I monitor RRS forum and compared to FFRR forum there are many more threads on Turbo Failure:
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3rd Mar 2015 2:10pm |
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discowill Member Since: 07 Jan 2015 Location: Wigan Posts: 47 |
I have not had a turbo failure on any TDV8 3.6 or 4.4 but had a few on other cars and I still think Cam-Tech-Craig is on the right track with EGR and turbo pipe failure being a reason for the turbo failing. I love working on older TDi Landy's and I have seen this same issue here, when the pipes fail and the owner just leaves it until it splits completely so maybe a few months of the turbo being over stressed then they get the pipe repaired and within weeks they suffer a turbo failure. It would be interesting to see if the people on here have had a turbo failure on a TDV8 that has never had EGR issues or any pipes replaced. |
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3rd Mar 2015 2:48pm |
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jeffw Member Since: 18 Jan 2015 Location: Paddock Wood Posts: 60 |
My understanding is that the turbo sizes and types are very different between the 3.6 and the 4.4 TDv8. I am told by someone who worked on the 'Lion' engine for Ford which became the 2.7 V6, 3.0 V6. 3.6 V8 and 4.4 V8 Diesels that the 4.4 is a parallel sequential with one small and one large turbo while the 3.6 has two equal size turbos.
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3rd Mar 2015 3:05pm |
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ebajema Member Since: 24 Mar 2011 Location: New Plymouth Posts: 4782 |
Prior to the 5.0 SC, I paid a deposit on a TDV8 3.6. During the selection and testing process we (Gary did most of the work) discovered that one of the turbos needed replacement, which the dealer was doing under warranty. No details on what exactly happened but just that it needed replacement.
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3rd Mar 2015 3:07pm |
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Vogue Member Since: 31 Jan 2008 Location: on the hill Posts: 3736 |
I have never heard of a 4.4 Turbo going, they have all been in Sports with either the 2.7 V6 or the 3.6 TDV8 - hence why I am told the TDV8 was dropped from the old Sport 1, and also occurred usually in chipped or mapped vehicles. 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17 |
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3rd Mar 2015 3:43pm |
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Mikey Member Since: 10 Jan 2008 Location: Dundee Posts: 1740 |
Turbo failure can be attributed to 3 A/B
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3rd Mar 2015 4:20pm |
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VMPP Member Since: 12 Jul 2009 Location: Lisboa Posts: 410 |
I was yeasterday on my mech, and he told me that the turbo failure is not very common.
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3rd Mar 2015 5:27pm |
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northernmonkeyjones Member Since: 24 Mar 2012 Location: derby Posts: 8499 |
pretty sure the following contribute:
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3rd Mar 2015 6:11pm |
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ajac8 Member Since: 04 Oct 2011 Location: Shakespeares County Posts: 1652 |
Asked my indy on this one. He has been in the game a good few years now. He reckons 4.4 failures are down to what he calls user error i.e oil grades, inadequate maintenance and they are a rarity in his work schedule, whereas 3.6's he reckons are more down to wear with high mileage and he a has about 6 a year which is not a lot compared to the number of vehicles his crew gets through at about average 10 a week dependant on the job of course.
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4th Mar 2015 9:29am |
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Cam-Tech-Craig Member Since: 03 Aug 2011 Location: Gloucestershire Posts: 16263 |
Cooling down periods are subject to the drive cycle the engine has just been through. The high end BIG turbo Jap stuff all have "turbo timers" which are linked to an internal temp gauge, so leave the engine running when you exit the car and lock it for a pre determined amount of time... Usually around a minute on a couple of race spec Evo's i know of...
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4th Mar 2015 9:36am |
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sasdiscos Member Since: 16 Oct 2014 Location: Northants Posts: 286 |
Luck I think is a part of it. Turbos are old enough now to take some stick without failing. Oil is better etc. turbos can go on for hundreds of thousands of miles. As it just spins within a brass bush with an oil bearing as such clean oil is a good start. I remember my old 200tdi. Lost oil pressure and found the big ends worn. As it was an off roader I slung in new end shells and happy days, oil pressure, but wait, with this new found oil pressure I had oil in the exhaust.
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4th Mar 2015 10:26am |
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mogman50 Member Since: 29 Sep 2014 Location: Settle Posts: 37 |
Hi,
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4th Mar 2015 10:48am |
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