D3Savage
Member Since: 30 May 2014
Location: Lancashire
Posts: 100
  
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| Engine Bearing Failure and Stop start |
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Hi all please take a look at this artical ........
http://www.federalmogul.com/en-US/Media/Do...122010.pdf
This really higlights my fears with the D4 stop start ......... these SDV6's (related to the TDv6) are already weak in the bearing department..........unless LR have taken special measures these 2015 cars could be a time bomb. Any thoughts.........  MY 2015 Se tec SDV6 auto
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 9th Dec 2014 4:42 pm |
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Martin
Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18526
  
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They haven't just bolted on stop/start onto an existing engine - as is clear the issues and requirements are well known and will be engineered for.
I wouldn't have said that bearing failures are pandemic on the TDV6/SDV6, yes there have been problems but find me a manufacturer or engine which doesn't have mechanical issues 
An engine is a complicated, mechanical device which will inevitably incur some component failures per billion cycles 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
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| 9th Dec 2014 4:54 pm |
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D3Savage
Member Since: 30 May 2014
Location: Lancashire
Posts: 100
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Point taken ........... yes there are many V6 diesels out there doing there thing...reliably.
But .......... the ultra thin oil and multiple restarts are tough on the bearings......only time will tell.
Have LR installed special bearings??? MY 2015 Se tec SDV6 auto
Extras added:
Electronic diff
Meridian 17 speaker audio
Cool cubby box
Full size spare
Tow bar
Surround Cameras
Black rear tints
Cosmic grey interior panels
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| 9th Dec 2014 5:12 pm |
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Martin
Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18526
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Well, they don't want them to fail in service, so you have to assume yes! 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
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| 9th Dec 2014 5:12 pm |
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Streffie
Member Since: 30 Mar 2014
Location: Midlands
Posts: 171
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Again, to my quote in a different post where people mocked more regular oil changes, for the cost of it, I'll change mine very regularly,
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| 9th Dec 2014 7:17 pm |
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mse
Member Since: 27 Jun 2005
Location: Shropshire
Posts: 2702
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I run a 98% successful process in switching eco off everytime...almost a year in I would say 6 or 10 times stop start has been used. Mike
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| 9th Dec 2014 7:50 pm |
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D3Savage
Member Since: 30 May 2014
Location: Lancashire
Posts: 100
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Hi ... I am doing oil changes at 5k as I have always done ........ re eco engine off mode I catch it about
85-90% of time......... It would be really reassuring to know if upgraded bearings have been installed as a result of auto shut off.............has any body got contacts in the Ford engine shed! MY 2015 Se tec SDV6 auto
Extras added:
Electronic diff
Meridian 17 speaker audio
Cool cubby box
Full size spare
Tow bar
Surround Cameras
Black rear tints
Cosmic grey interior panels
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| 10th Dec 2014 9:17 am |
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winnie5
Member Since: 12 Feb 2014
Location: hants
Posts: 86
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I'd like to know exactly how much fuel is used while ticking over, and what it costs.
Lets say 1 litre an hour, which is about 2p / min. I would estimate a maximum of 5 min / hour when stop start is active, so thats 10p / hour saving when the engine is running.
Average anual mileage is 12,000 miles at say 40mph average speed, equals 300 hours running per year at 10p = £30 / year fuel saving !
Is it really worth using stop start to save £30 / year ?
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| 10th Dec 2014 9:39 am |
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D3Savage
Member Since: 30 May 2014
Location: Lancashire
Posts: 100
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Good point.......well made.  MY 2015 Se tec SDV6 auto
Extras added:
Electronic diff
Meridian 17 speaker audio
Cool cubby box
Full size spare
Tow bar
Surround Cameras
Black rear tints
Cosmic grey interior panels
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| 10th Dec 2014 9:55 am |
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Canburne
Member Since: 15 Jan 2013
Location: Devon
Posts: 2035
 
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That is not really the point - JLR have to be seen to make their engines more efficient so sit back and enjoy the £180 discount on the VED. Thats an awful lots of idling time.......  .
"the inherent vice of capitalism is the unequal sharing of blessings....the inherent vice of socialism is the equal sharing of miseries" Winston Churchill
2016 D4 Landmark Club Waitomo ...or is it Club Tempest????
2015 D4 HSE Aintree Green
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| 10th Dec 2014 11:27 am |
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winnie5
Member Since: 12 Feb 2014
Location: hants
Posts: 86
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It will use even less fuel when it's in bits having a new ring gear and main bearings replaced.
JLR won't give a toss if it breaks after 3 years - in fact they will make money selling you the spares to rebuild it.
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| 10th Dec 2014 11:57 am |
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Navigator
Member Since: 17 Mar 2010
Location: Stay at Home. One of the lives you save could be your own.
Posts: 5113
 
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Having a mechanical oil pump where pressure is dependent of the engine turning is the cause of the problem. Could easily have either a stored pressure system or an electric oil pump to keep oil up to the bearing shells that need it when under stop/start regime. If they wanted to - that is! 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.
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| 10th Dec 2014 12:20 pm |
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winnie5
Member Since: 12 Feb 2014
Location: hants
Posts: 86
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Agree that would help bearing wear, and an alternator / starter motor bolted to one end of the crank would stop ring gear wear, but i bet neither has been done.
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| 10th Dec 2014 12:26 pm |
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Sloss
Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1691
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A pre-engaged starter should give negligible ring gear wear  Stew,
2010 D4 gone but I really loved it
Went back to Merc - C350 AMG
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| 10th Dec 2014 1:51 pm |
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