 | Home > Puma (Tdci) > Oil pump question |
 
|
|
|
| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237   
|
MMM dont quite agree
- With quality of oils these days I agree that 3,000 mile oil changes unnecssary - Only oils that affetcted seals was synthetics, this is no longer an issue - More expensive oils are better - Ester oils for highly turned cars best you can buy - Audi especially the 1.8t engines prone to sludging due to oil, oil spec was improved. so did VW have a problem with sludging so oil havd to be changed more regularly Optimum time for changing oil ought to be related to a number of factors, of which distance travelled is probably one of the least important in most cases: - Number of cold starts (more condensation in a cold engine) - Ambient temperature (how long before warm enough to stop serious condensation) - Effectiveness of crank case scavenging (more of that anon) - State of wear of the engine (piston blow-by multiplies the problem) - Distance travelled. Oil is for lubricating and I find it hard to believe that oil as it get older gets better, it gets contaminated as it get older and its effectiveness reduces Been driving car and motor bikes and stripping down engines since I was 16 yrs old (33 years ago) fist engine I stripped was Triunph spitfire where I change the big end and little engines ruined by short journeys and possibly lack of frequent oil changes. Anyway we are all individuals and all have our own opinions  |
||
22nd Mar 2015 11:18am |
|
| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018  
|
There's a difference between passive and active regeneration. Short runs will impact the ability of passive regeneration to take place and thus potentially bring forward the requirement for active regeneration. |
||
|
22nd Mar 2015 11:54am |
|
| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
|
also are 2 different regen processes using 2 different ways of regen
one uses a fluid added to regen (like adblue , eloys fuid that goes in a seprate tank and needs topping up evey now and then normally done on a service when needed ) one uses diesel injected on exhaust stroke to burn in dpf to rise temp to turn carbon to ash but there all done on the pressure before and after measrment |
||
|
22nd Mar 2015 12:07pm |
|
| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018
|
Not strictly correct - the DPF software incorporates a mileage trigger which is used as back-up for active regeneration. If active regeneration has not been initiated by a back pressure signal from the differential pressure sensor, regeneration is requested based on distance travelled. I'm guessing this is a failsafe in case any of the sensors or software used to calculate the backpressure are not working correctly. |
||
|
22nd Mar 2015 12:12pm |
|
| Supacat Member Since: 16 Oct 2012 Location: West Yorkshire Posts: 11018
|
Defender specific there are two potential injections of fuel - combustion & then power stroke not exhaust stroke & technically the diesel injected on the power stroke burns in the cat not the dpf. It's the hotter gases from the cat that then enter the dpf and burn the particulates. |
||
|
22nd Mar 2015 12:20pm |
|
| willy eckerslike Member Since: 15 Jun 2009 Location: North yorks Posts: 1789 
|
Wifes freelander2 and the Evoque she had before that both needed early oil changes at around 5k due to only travelling short distances and not always getting fully warm Original Member Pie n Pea Club.
110 HCPU Tipper |
||
|
22nd Mar 2015 12:46pm |
|
| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
|
who thinks the diesel engine will keep being produced , has it had its day in normal car motoring ?
after all this the question must be "who the hell wants a modern diesel in a car ? " there more hassle then any petrol engine now aren't they ? the start of this topic was oil pumps wasn't the pump changed to make it variable to help load on engine to help emissions ? |
||
|
22nd Mar 2015 12:51pm |
|
| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237
|
Simple easy reading regarding oil
http://www.honestjohn.co.uk/faq/importance-of-clean-oil/ Regarding the oil pump - it will have an easier life with well maintained engine running the correct oil, changed as frequently as your driving style dictates. example - if lots of stop starts and short journeys change more frequently. Most Transit drivers will put any old oil in the engine and as I full well know and don't follow service regime, this I dare say is a contributing factor to engine failing, Sorry but I think it utter crap that oil lubricates better as it get older and there is no test results to prove this (just like putting 2T oil in diesel - something again I would never do as it is designed for 2 stokes !!!), I will continue to change the oil in my 15yr old hilux which has an awful lot of miles on it and the oil is changed every 5,000 miles. My old ST focus which had 140,000 miles on the clock when I sold it the engine ran as sweet as a nut - oil changed every 10,000 miles and the car was bouncing off its engine limiter every day of its life. So whilst I agree 3000 mile oil changes are unnecessary I re-iterate we all have our own opinions |
||
|
22nd Mar 2015 3:22pm |
|
| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
|
something of the net as well
Engine oils are subjected to a series of industry standard engine dynamometer tests to measure their wear protection capability, sludge and varnish formation tendencies, and fuel efficiency among several other performance attributes before they are approved for use in customer engines. However, these performance attributes are measured at the end of tests and therefore, do not provide any information on how the properties have changed during the tests. In one of our previous studies it was observed that engine oil samples collected from fleet vehicles after 12,000 mile drain interval showed 10-15% lower friction and more importantly, an order of magnitude lower wear rate than those of fresh oils. It was also observed that the composition of the tribochemical films formed was quite different on the surface tested with the drain oils from those formed with fresh oils. The objective of this investigation is to demonstrate how the friction and wear performance changed with oil drain intervals. A fleet of three vehicles was run in Las Vegas and oil samples were collected at various drain intervals from 3,000 miles to 15,000 miles. As in the previous study, the results showed that the aged engine oils provide lower friction and much improved wear protection capability. These improvements were observed as early as the 3,000 mile drain interval and continued to the 15,000 mile drain interval. The composition of tribochemical films formed on the surface with the 3,000 mile drain interval is similar to that formed with the 12,000 mile drain interval as seen before. These findings could be an enabler for achieving longer drain interval although several other factors must to be considered. |
||
|
22nd Mar 2015 4:10pm |
|
| nidge n Member Since: 04 Feb 2012 Location: Cheshire Posts: 719 
|
For those guys in the know. When you are changing the oil pump under warranty, is it for the same specification pump or have ford enhanced it in any way? As I'm an age that is old enough to remember, regular changing of oil was always a must. This is a habit I've maintained throughout my driving life. Not changing the spec of the pump would lead me to believe that it is a contaminated oil issue. Changing the spec of the pump makes you think a problem with the original design. Or a. I being simple
 |
||
|
23rd Mar 2015 7:53pm |
|
| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
|
It's a revised pump
All the ones I've seen never had raised oil level . |
||
|
23rd Mar 2015 8:08pm |
|
| Scotm Member Since: 28 Feb 2014 Location: Aberdeenshire Posts: 666  
|
So how big a job is it to replace the oil pump and does anyone know the cost/part number of the upgraded one?
My warranty runs out in Sept and just considering whether to change it as I aim to keep my defender for a while. |
||
|
23rd Mar 2015 8:50pm |
|
| Scotm Member Since: 28 Feb 2014 Location: Aberdeenshire Posts: 666
|
So how big a job is it to replace the oil pump and does anyone know the cost/part number of the upgraded one?
My warranty runs out in Sept and just considering whether to change it as I aim to keep my defender for a while. |
||
|
23rd Mar 2015 8:50pm |
|
| Scotm Member Since: 28 Feb 2014 Location: Aberdeenshire Posts: 666
|
Sorry don't know how I double posted!
|
||
|
23rd Mar 2015 8:52pm |
|
|
|
| All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
