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Discussion Starter · #41 ·
1/2 litre of 5W40 C3 seemed to have quietened it after I first put it in, but now it's back as usual.

Does anyone know what fitment size is required for the oil pressure gauge?
 

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1/2 litre of 5W40 C3 seemed to have quietened it after I first put it in, but now it's back as usual.

Does anyone know what fitment size is required for the oil pressure gauge?
I will check the fitting in the garage tomorrow. It think it was 1/4”. The kit I got had all different type of fittings.
 

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Discussion Starter · #43 ·
I will check the fitting in the garage tomorrow. It think it was 1/4”. The kit I got had all different type of fittings.
That would be great thanks, I was going to buy one of those kits but the garage at work has one - but it's just a single fitting.
 

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That would be great thanks, I was going to buy one of those kits but the garage at work has one - but it's just a single fitting.
No worries. I did check and it is 1/4” fitting. You need a male 1/4” to fit in place of the pressure sensor.
 

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Discussion Starter · #45 ·
No worries. I did check and it is 1/4” fitting. You need a male 1/4” to fit in place of the pressure sensor.
Awesome, thanks for checking that. I bought this which says it has a 1/4 fitting which I hope is going to fit?
 

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Discussion Starter · #47 ·
I'm actually kind of hoping for low pressure as it will narrow down the search and hopefully if it turns out to be the oil pump then it's not too expensive a job. Looks a little time consuming though.
 

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I'm actually kind of hoping for low pressure as it will narrow down the search and hopefully if it turns out to be the oil pump then it's not too expensive a job. Looks a little time consuming though.
There is a crankshaft pulley that needs to be remove to change the oil pump and I literally broke two breaker bars and few spanners, a hammer to take that off and I couldn’t. Sent the crankshaft with pump and pulley to workshop. I even couldn’t do the last 30 degrees of tension when put it back on with a 2m long cheater bar. They used a lot of heat and impact wrench to remove it from what I saw on the bolt. If you have a proper impact wrench and blowtorch it shouldn’t be that bad.

Forgot to mention, I bought exactly the same kit you mentioned but half the price from china and the pressure gauge was faulty. The scale was wrong. 4 bar was shown as 0.4!

problem is, being lifter or oil pump, both need to take timing belt off. Let’s hope it’s down to oil.

I have two ideas if you want to explore:
1- if you haven’t torqued the oil filter cap, it worth checking. Being tight or loose would affect the oil pressure and flow.
2-I was watching live oil volume (inferred from oil level) in SDD last week and shutdown. Oil vol was around 6L at idle and suddenly dropped to 4.3L after shutdown. That is the oil trapped after oil pump. Over 5mins that I was watching it, oil increased to 4.5L. I have an idea to see how fast oil level will recover. If it is too fast, tolerances in oil pump should be too large letting oil to flow back. It’s just cleaner than using oil pressure gauge method.
 

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I did some searches this morning and hearing some Audi and BMW engines with lifter noise, I would say noise from your car is nothing! I agree to check oil pressure to be on safe side but I highly doubt oil additives would work that much. The proper way is to replace all the lifters. I seems the more effective oil additives will block the check valve on lifter and trap the oil there which might cause dry contact between lifter and rocker. Even if you increase oil pressure it could return at some point if lifter is faulty.
 

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Discussion Starter · #50 ·
Interesting theory re. point 2. I'll maybe have a look at this. What about looking at it the other way around and seeing how fast the oil level goes down after starting the car?

My pressure gauge has arrived and also the Autel dongle so hopefully I'll know a little more by this evening.


Thanks!
 
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Discussion Starter · #51 · (Edited)
Spoke with the specialist and he could also hear the noise but isn't quite sure what it is i.e. crankshaft or lifters, but I suspect the latter. He believes it is oil dilution over the years which has reduced lubrication and caused excessive wear somewhere. The fact that I changed my oil a few days ago, then did a regen and am now sitting with 8 litres kind of backs this up lol

After some quick analysis he's confident it should be ok for a year or so but I should keep a close eye on things. I'm very happy with this as I didn't want to sell the car as there's not much else out there which interests me.


EDIT: Oil pressures came back reasonably good, always above 0.5 bar although it did top 5 bar when revving right up. He wasn't worried about it.
 

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I think you have enough info there Graham to forget it, if it as anything to worry about it will get much worse. You have good oil pressure and you change the oil regularly. I wouldn't go to C3 to try and lower the noise even though it may not cause any problems, I have been told that many garages put C3 in everything.
 

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Discussion Starter · #53 ·
I think you have enough info there Graham to forget it, if it as anything to worry about it will get much worse. You have good oil pressure and you change the oil regularly. I wouldn't go to C3 to try and lower the noise even though it may not cause any problems, I have been told that many garages put C3 in everything.
Thanks, I agree. I'm changing the oil today (again) as it's clearly diluted after that last regen. If the primary suspicion is dilution which is causing this then I'm only going to put C1 5W30 in so that minimum ash/soot is prioritised.

I suspect a little excessive wear has already occurred so all I can do know is try and prevent any further excessive wear.
 

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Thanks, I agree. I'm changing the oil today (again) as it's clearly diluted after that last regen. If the primary suspicion is dilution which is causing this then I'm only going to put C1 5W30 in so that minimum ash/soot is prioritised.

I suspect a little excessive wear has already occurred so all I can do know is try and prevent any further excessive wear.
If you have seen the damage made to my crankshaft after it spun a bearing, you wouldn’t worry about any damage. So long as bearings are in place, nothing will go wrong. It’s only the “risk” of dry contact that worries people when there is oil dilution. If you imagine, an start up after car was sat for several days and oil is drain back would be more damaging than running engine on water instead of oil.
 

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It's o/s wheel in both videos. I had to pop to the supermarket earlier this evening and pushed the car pretty hard as I was in that kind of mood. When I parked up I sat next to a parked car with her running to let things cool a bit and the engine sounded bloody awful and that noise was amplified even more. Engine sounded clapped out lol

I've never checked but can icarsoft read oil pressure from the oil pressure sensor? I've got the data on what the oil pressure should be at particular rev ranges, so it's the next place I'm going to look. If it's not oil pressure then I'm guessing it's the drivetrain somewhere and to be honest if that's the case then the car will probably go and I'll start looking for a petrol or hybrid.

My iCarsoft can read the real time oil pressure in live readings. What oil specification are you running? If not the recommended spec, it may not be viscous enough as it warms up. You also have some edgewear on that tyre which may indicated a steering alignment may be prudent?

I have been running Penrite Enviro+ Full Synthetic C4 Diesel 5W-30 with no issues in my 2012 XF 3.0D since I got it.
 

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Discussion Starter · #56 ·
My iCarsoft can read the real time oil pressure in live readings. What oil specification are you running? If not the recommended spec, it may not be viscous enough as it warms up. You also have some edgewear on that tyre which may indicated a steering alignment may be prudent?

I have been running Penrite Enviro+ Full Synthetic C4 Diesel 5W-30 with no issues in my 2012 XF 3.0D since I got it.
How are you reading oil pressure as I don't believe the works like that? Would you be able to post a screenshot so I can see which area to look.

I use the Ford spec C1 5W30 oil, either Millers, Fuchs or Motul. I've tried using a drop of 5W40 but it made no difference.

Aye that doesn't surprise me about the tyres, the roads are so bad here that the alignment is probably out a little. I checked a year ago and it was ok but a lot can happen in a year!
 

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My iCarsoft can read the real time oil pressure in live readings. What oil specification are you running? If not the recommended spec, it may not be viscous enough as it warms up. You also have some edgewear on that tyre which may indicated a steering alignment may be prudent?

I have been running Penrite Enviro+ Full Synthetic C4 Diesel 5W-30 with no issues in my 2012 XF 3.0D since I got it.
There is no oil pressure sensor on this engine IIRC. It’s an pressure switch only set around 0.5bar. It has proper fuel pressure sensor or brake fluid pressure sensors.
 

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Discussion Starter · #58 ·
I pulled this from the manual if it helps:

The oil pressure sensor is located in a threaded port in the LH cylinder head. The sensor is connected directly to the
instrument cluster.

The sensor is not connected to the ECM but is supplied with a reference voltage from the instrument cluster. The sensor ground
is through the sensor body and the engine. When the oil pressure falls to below a predetermined threshold, the sensor internal
switch contacts close, completing a circuit from the instrument cluster. This circuit is sensed by the instrument cluster which
displays and appropriate warning message and warning lamp to alert the driver.

The oil pressure switch, located in the 'vee' at the front of the LHcylinder head, connects a ground input to the instrument
cluster when oil pressure is present. The switch operates at a pressure of 0.15 to 0.41 bar (2.2 to 5.9 lb/in2).
 

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The noise in your videos is what made me sell my XF ... been fighting with that noise for 6 months or so where I changed injectors , tried 3 different type of oil , lifter additive and what not.
The noise was there no matter what. As I just wanted to sleep better at night (dreaming of snapped crankshaft horrors) I decided to part with the car. Only had drove 120.000km and was mint but I could not take the noise anymore.
My oil pressure was also normal and thus I took the oil pump out of discussion, but an LR engine rebuilder told me they do change oil pumps often on this engines because of low oil pressure problems...

Noise appeared out of nowhere and did not diminish but did not got louder either... the Jaguar / LR specialist I took it to at the end told me he can hear it also but some of them have this noise ... some not. I simply could not live with it and sold it.

I would suggest to send a sample of oil to analysis and see how much is your oil dilution with fuel. Short trips in a car with DPF won't make it any good at all and diluted oil is a direct trip to disaster.
Oil analysis would also show you if you have any metal in the oil also.
 

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Discussion Starter · #60 ·
The noise in your videos is what made me sell my XF ... been fighting with that noise for 6 months or so where I changed injectors , tried 3 different type of oil , lifter additive and what not.
The noise was there no matter what. As I just wanted to sleep better at night (dreaming of snapped crankshaft horrors) I decided to part with the car. Only had drove 120.000km and was mint but I could not take the noise anymore.
My oil pressure was also normal and thus I took the oil pump out of discussion, but an LR engine rebuilder told me they do change oil pumps often on this engines because of low oil pressure problems...

Noise appeared out of nowhere and did not diminish but did not got louder either... the Jaguar / LR specialist I took it to at the end told me he can hear it also but some of them have this noise ... some not. I simply could not live with it and sold it.

I would suggest to send a sample of oil to analysis and see how much is your oil dilution with fuel. Short trips in a car with DPF won't make it any good at all and diluted oil is a direct trip to disaster.
Oil analysis would also show you if you have any metal in the oil also.
Thanks and good to hear it's not just my engine. I'm keeping a close eye on it.
 
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