 | Home > Puma (Tdci) > Oil pump question |
 
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4662  
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So whatever the ins and outs of it, more frequent oil and filter changes would appear to be the norm - as in preventive maintenance. I suppose the question is "How frequent should the changes be for the average owner?"
I wonder if the Defender replacement will have similar issues engine wise? Emission laws are only going to get stricter. 1982 88" 2.25 diesel 1992 110 200tdi csw -Zikali 2008 110 2.4 tdci csw-Zulu 2011 110 2.4 tdci csw-Masai |
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18th Mar 2015 11:40am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17382  
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The management system has no way of knowing how much oil dilution has actually taken place - it isn't sampling the lubricant.
The oil service message is really a "best guess" based on driving style and nothing else. |
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18th Mar 2015 1:09pm |
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| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018 
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It's a little more than just driving style - the calculation includes the frequency and length of each active regeneration. So for it to calculate any percentage, it must have some values for the volume of fuel used and how much is expected to end up in the sump.
It would seem sensible for that calculation to err on the conservative side. I would just be interested to know what these values were. I guesstimated 1.89 litres of diesel per active regeneration. |
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18th Mar 2015 2:40pm |
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| Juhulia Member Since: 10 Jul 2013 Location: Dresden Posts: 17 
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According to my dealer the 'OIL SERVICE' sign does simply count milleage and time.
From these data it "calculates" the necessity of an oil service according to the service intervalls that are well-known. A job any 5 year old child could also do. The sign does not indicate things like 'Diesel Oil Penetration Rate' or 'DPF fillement ratio' or whatever you guys are guessing. Best - Julia Last edited by Juhulia on 21st Mar 2015 1:53pm. Edited 1 time in total |
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21st Mar 2015 1:44pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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sorry but why worry what makes the light come on
when it does come on just change oil and filter |
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21st Mar 2015 1:48pm |
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| Happyoldgit Member Since: 14 Sep 2007 Location: Norfolk Posts: 3471 
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...then reset the notification. Steve.
Owned numerous Land Rover vehicles of all shapes and sizes over the decades. Current Defender: A non tarts hand-bagged Puma 110 XS USW. [Insert something impressive here such as extensive list of previous Land Rovers or examples of your prestigeous and expensive items, trinkets, houses, bikes, vehicles etc] http://forums.lr4x4.com I used to be Miserable ...but now I'm ecstatic. |
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21st Mar 2015 10:27pm |
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| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237  
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Changed my oil at 6,000 miles as the oil appeared to be very black and appeared to be thickening
I have now covered 3,000 miles on the new oil and have 9,000 miles on the clock - the oil change warning as yet has not come on and next oil change will be at 12,000 miles where the vehicle will be 1yr old (doing approx 12,000 miles a year) It will be intering to see if the oil change warning does come up as I did not reset it when I changed the oil at 6,000 miles I do a fast run to work of 32miles each way along the M4 and A465, my DPF only does an occasional chuck. Question I thought the longer the run the better for cleaning out the DPF, I thought it was the short runs that caused the DPF to block up? |
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22nd Mar 2015 7:32am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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I don't think long or short runs make any difference to dpf UNTIL it wants to regen then you need a long run for it to start and finish the regen
its the starting to regen and not finishing the process is more the problem and when you can get the diesel in oil more, all short runs mean it may start regen and cant finish because you stop then next short run it starts process again and cant stop because you stop and so on on a short run im guessing there would be more tickover stops and starts etc allowing diesel passed rings and in to oil I know when doing a forced regen you need to keep speed and revs up for the scanner to keep the process going which sometimes when there is a bit of traffic about is hard to do |
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22nd Mar 2015 7:51am |
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| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237
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Thanks for that
Im a firm believer in frequent oil changes and looking at the state of the oil earlier in the thread it is understandable why the pump/engine would fail with oil in such condition. My Audi meant to have long life service - 20,000 miles i do oil every year or 8,000 miles Hilux mk4 (15yrs old) oil changed every 5,000 miles (run semi synthetic 10w40) instead of 6,000 miles which was based on lower spec mineral oil Will change oil on Landy every 6000 miles, i have found the Millers xf C1 to be well priced, normally always use Catrol but it is very hard to get 
Remap shortly and may consider DPF remove, know it wont pass MOT chance I will take as I intend on hanging onto the Landy |
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22nd Mar 2015 8:12am |
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| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018
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According to dealer - not the best start to making a statement of fact 
I quoted from the workshop manual, if you'd like to ask said dealer which part of manual needs correction? Talking  is in their job description, isn't it? |
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22nd Mar 2015 9:52am |
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| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018
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Worry would be the wrong description. Keen to understand how & why things work. If you are happy to not know how to raise the bonnet then that's fine move on & let those that do ask questions and learn new things. |
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22nd Mar 2015 10:02am |
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| GEllis Member Since: 21 Nov 2013 Location: Cornwall Posts: 58 
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How can you tell when the regeneration process starts?
I only recently had one of my 2.2 defender engine replaced under warranty with 64k miles due to oil pump failure. |
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22nd Mar 2015 10:14am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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ok been opening bonnets all my life
it knows when to regen not by miles , not by driving style , not by how many oil changes its had , not by trip length , it knows by the difference pressure before and after dpf and ecm calculates how blocked the dpf is if you look at the dpf there is a small stainless pipe comes off the top and bottom of the dpf that run up to a valve that tells ecm the pressure difference for oil service light to come on its normally a mixture of time running and miles and maybe dpf regens done , some cars have a oil level as well so if level is up after regens it tells you to change it . normally ( well all the ones ive seen is the oil gets thinner with diesel , I think some people think it gets thicker with carbon due to having a dpf , it cant as carbon is stored in dpf ready to be burnt at a high temp in regen and turned to ash ) oil gets thick due to not being changed I don't believe in changing oil too regular , I don't believe new oil to be a better lubicatant and also your doubling the time in a engines life that there is no oil circulating and what is is full of air bubbles , I think oil gets better with use ( BUT not over use ) I don't believe in 20,000 mile oil changes , once a year or 8-10k is ok depending on conditions , modern diesels run cleaner less cr@p in oil , modern diesels have lower compression , modern diesels are built with better machining and better metals , run better oils , so why change oil more I don't believe the more expensive the oil the better more the problem with modern synthetic oils is how they effect plastic and rubber in the engine , making o rings hard , making oil seals hard , filters hard , this was one of the main problems with the k series headgasket problem the gasket used rubber seals and I think the oil makes the seals hard by my other post about why worry is some people will never understand the mechanics of a engine ( not pointing finger at anyone ) , in the same way I will never understand other peoples trade different things for different people my mate has two sons , one lorry mechanic and a good one , rides motorbike etc , the other one a a Michelin star chef and a good one , stuggles to fill his car with petrol , cant even change a fuse , falls off a bike within 10 ft , he will never understand mechanic's but give him a bit of meat and few vegs and your sorted ! that's all I ment by post |
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22nd Mar 2015 10:43am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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I don't think regen has any effect on oil pump failure how do you know when it regens ? be honest I don't really know , guessing maybe smell of higher temp in exhaust , fitting temp gauge to exhaust , a light would be handy but a light makes most people panick , as said most don't need to worry as if everything is working right it will do it and you don't need to know , general advise seems to be if you only do short runs you need to gave them a run up the motorway every now and then , when it needs a run is anyone's guess ! as with anything im not a expert on tdci engines only what I think happens !!!! , you treat your car and engine as you think is best |
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22nd Mar 2015 11:02am |
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