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James3LDR
Member Since: 28 Jun 2016
Location: Bath
Posts: 32
  
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| 2.7L & 3.0L Engine Failure Cause |
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Hello Hive Mind,
This evening I came across this video that alledges to explain the cause of the engine failures we regularly see reported on this forum. (it's not mine!)
Interested in thoughts on whether or not this is good/bad info. Does it tell us anything we didn't already know?
MY12 D4 HSE
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 5th Feb 2024 7:23 pm |
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NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 541
 
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I too saw this and am not surprised that he came to the conclusion that fuel dilution is a contributor to crank failure. I wrote about this in a previous thread - I’ll find what I wrote and copy it here.
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| 5th Feb 2024 8:22 pm |
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NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 541
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NC500 wrote:My first time wading into this issue! I won’t make a comment on the 5w30 or 40 argument as I am just a bloke driving a D4 and posses no qualifications to venture an opinion.
However, I can put my tuppence worth in regarding fuel dilution. I send a sample of every used batch of oil off for analysis and in my experience of 25 (ish) samples I can inform you all categorically that my D4 which has mixed use driving conditions (hours long drives at 60 ish plus many short journeys on A, B and off-road) that oil change intervals of 6000 miles will keep fuel dilution below 1.5%.
15,000 intervals will see dilution upwards of 5% (very dangerous) and soot levels of over 4% (a nice abrasive paste by that stage).
Therefore, whatever viscosity you use, keep oil changes more frequent - you decide what that is for yourself
Last edited by NC500 on 5th Feb 2024 8:27 pm. Edited 1 time in total
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| 5th Feb 2024 8:24 pm |
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NC500
Member Since: 18 Sep 2017
Location: On the NC500
Posts: 541
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NC500 wrote:Oil analysis labs put maximum fuel dilution levels at around 3.5% with 4% being identified as a critical level.
https://www.savantlab.com/testing-highligh...detection/
Oil manufacturers and test labs indicate that dilution in excess of 4% could possibly lead to “lack of lubrication” (as the oil viscosity is reduced) leading to bearing failures, premature engine wear etc.
JLR state that 6% is an acceptable level of fuel dilution - don’t know why their engine can tolerate such high levels….🤔🫤
If you are already running a low viscosity (ie 5w30) then for goodness sake, keep your fuel dilution levels low!
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| 5th Feb 2024 8:25 pm |
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Marshall8hp
Member Since: 05 Dec 2022
Location: Townsville
Posts: 34
  
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For me, 10,000km (6k miles) is a maximum. Oil and all filters, need them or not.
My local LR specialist shop's opinion (being in a large city, they look after over 100 D3/D4) is that, once you sort out the oil pump issue on the early D3s, then as long as you keep the oil changes to 10k km, service the belts every 100k to 130k km, then the 2.7 is basically a bomb proof engine. The 3.0 is producing a lot more power and especially torque with the same engine internals.
His thoughts on chipping are that you do it at your peril as the engines (particularly the 3.0) are highly stressed in standard trim, without trying to get a 20%+ torque boost.
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| 7th Feb 2024 6:46 am |
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Mike_Pax
Member Since: 11 Oct 2022
Location: North Yorks
Posts: 39
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I've often wondered on this topic....is the method of extracting the old oil that LR use dealers i.e. typically suck the oil out rather than draining all the old residue out through the sump, part of the problem. I always drain the oil out though the sump now, this after many years ago using the extraction method then removing the sump to see if it got everything....it hadn't. So ever since when i change the oil, i also remove the sump plug and let it drain fully, its not that hard to do. Original engine is now at 165k and so far all is good
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| 7th Feb 2024 9:38 am |
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itsaguything
Member Since: 20 Dec 2023
Location: Manotick, On
Posts: 256
  
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And so do I even on the SCV6 engine. There is just something satisfying, knowing that the crap is draining out the bottom.
Funny how iit seems the magnetic oil plug has gone out of favor.
But related to the theme of oil dilution, I have precisely this issue on the diesel on my boat… resulting in an oil change every season. (and she doesn’t run often as its a sailboat). 2015 LR4 HSE Lux Aintree Green
2013 LR2 HSE Radiance Red
2007 XKR Jaguar Racing Green
2005 XJR Jaguar Racing Green
2002 S-Type R British Racing Green
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| 7th Feb 2024 12:28 pm |
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