LOW OIL PRESSURE LIGHT, STOP ENGINE, CHECK OIL LEVEL when engine is warm X5 V8 4.4i

[Skyline]

Originally Posted by JCL

What civ said.

Skyline, this is all just guessing until the OP actually hooks up a oil pressure gauge and starts diagnosing the problem. But we know the engine wasn't maintained properly. And there are lots of bearing surfaces other than rod bearings.

I'd think twice about that engine flush. It will lower oil pressure, unless the only thing clogged is the oil pump.

Checking the oil pressure is certainly an easy and appropriate thing to do. But assuming the pressure is low, (as the recently replaced factory sender is already telling us,) what next????

So what if an engine flush lowers the oil pressure further? Obviously the engine is designed to produce proper oil pressure without being packed with sludge. All that would do is help with the diagnosis. If either the pump has totally failed or is clogged up, (even after the flush,) or the bearings (and therefore the entire engine), really are shot, desludging the engine won't do any real harm. But it IS is a cheap possible fix that does not involve taking anything apart. Next step would be to drop the pan and take a closer look at the oil pump and also clean check the pressure relief valve. You certainly can't condemn an engine that is running normally, (albeit with low oil pressure), without rulling out problems with the oil pump.

[deetui]

Hi, i am so sorry to hijack your post, i am new to xoutpost and cant find how to do a post on here, i have had a really bad day with the mechanic fixing my car, i hope yous can help me and tell me if i am right in what i wanted the mechanic to do. So i purchased a 2005 BMW X5 4.4 in September 2016, it came with 1 year warranty, my service is due next month and was booking it in, however my stop engine, check oil pressure warning came on, i took it to the mechanic and they said it was the oil pressure switch, they tried charging me $460 to replace it, i had it replaced with a genuine BMW switch and the light still came on, i then contacted them to say it wasn't the switch, as the light still came on, and now it started to have a ticking sound, immediately i switched the car off and had it towed to them, i asked them if they could check the oil pump or the bearings, they have done numerous things to my car e.g. changed oil filter, checked housing, dropped the pan and cleaned the pan, and still have not checked the oil pump or bearings which i have asked them to do, so far now they want me to pay $900 and have still not checked the pump or bearings and are saying i need a new engine oh and to top it off the warranty company are now trying to say because i have completed my service before 5,000kms my warranty is now void, sorry lady but its 10,000kms and it is still covered
Again i am so sorry but they literally had me in tears, and i am hoping someone can tell me if this mechanic is right, i am lost
The current oil pressure psi is at 12

[X53Jay4.8is]

Originally Posted by deetui

Hi, i am so sorry to hijack your post, i am new to xoutpost and cant find how to do a post on here, i have had a really bad day with the mechanic fixing my car, i hope yous can help me and tell me if i am right in what i wanted the mechanic to do. So i purchased a 2005 BMW X5 4.4 in September 2016, it came with 1 year warranty, my service is due next month and was booking it in, however my stop engine, check oil pressure warning came on, i took it to the mechanic and they said it was the oil pressure switch, they tried charging me $460 to replace it, i had it replaced with a genuine BMW switch and the light still came on, i then contacted them to say it wasn't the switch, as the light still came on, and now it started to have a ticking sound, immediately i switched the car off and had it towed to them, i asked them if they could check the oil pump or the bearings, they have done numerous things to my car e.g. changed oil filter, checked housing, dropped the pan and cleaned the pan, and still have not checked the oil pump or bearings which i have asked them to do, so far now they want me to pay $900 and have still not checked the pump or bearings and are saying i need a new engine oh and to top it off the warranty company are now trying to say because i have completed my service before 5,000kms my warranty is now void, sorry lady but its 10,000kms and it is still covered
Again i am so sorry but they literally had me in tears, and i am hoping someone can tell me if this mechanic is right, i am lost
The current oil pressure psi is at 12

To check the bearings they would have to be removed. Very labor intensive. They should be able to put a pressure gauge on the vehicle and see if the pressure is normal. If the oil pump is bad then it should be replaced. Let me guess you have one of those aftermarket warranties for your vehicle that is not from BMW? correct? In most of those cases the independent shop just has to show them proof of the problem and submit the details for the claim. Depending on the details of your warranty you may have to pay the first dollars of discovery and could be applied to the warranty deductible. If the engine is toast then the warranty company would just have to replace it providing that this is considered a covered event on the warranty.

Forgot to add if the sound is ticking noise then maybe its just as simple as the oil pump needs replacing. If the engine is knocking then you have a more serious problem like perhaps the a bearing has failed.

[deetui]

Originally Posted by X53Jay4.8is

To check the bearings they would have to be removed. Very labor intensive. They should be able to put a pressure gauge on the vehicle and see if the pressure is normal. If the oil pump is bad then it should be replaced. Let me guess you have one of those aftermarket warranties for your vehicle that is not from BMW? correct? In most of those cases the independent shop just has to show them proof of the problem and submit the details for the claim. Depending on the details of your warranty you may have to pay the first dollars of discovery and could be applied to the warranty deductible. If the engine is toast then the warranty company would just have to replace it providing that this is considered a covered event on the warranty.

Forgot to add if the sound is ticking noise then maybe its just as simple as the oil pump needs replacing. If the engine is knocking then you have a more serious problem like perhaps the a bearing has failed.

Hi thank you for your response, yes it is aftermarket market warranty, so they tested the oil pressure and came back at 12psi, the sound is a ticking sound, as soon as i started the car the ticking sound started, so i turned it off and had it towed to the mechanic, they dropped the pan and cleaned it out, they cleaned the filter housing and checked for cracks, and still the light comes on and thats when they checked the pressure again and came back with 12psi, i asked them to check the oil pump and they still havent, i am not sure if it is the pump or the bearings, but i do know it is a ticking sound

[X53Jay4.8is]

Originally Posted by deetui

Hi thank you for your response, yes it is aftermarket market warranty, so they tested the oil pressure and came back at 12psi, the sound is a ticking sound, as soon as i started the car the ticking sound started, so i turned it off and had it towed to the mechanic, they dropped the pan and cleaned it out, they cleaned the filter housing and checked for cracks, and still the light comes on and thats when they checked the pressure again and came back with 12psi, i asked them to check the oil pump and they still havent, i am not sure if it is the pump or the bearings, but i do know it is a ticking sound

Well 12psi is low so more than likely its a pump related problem. Ticking sound in this case is good thing. Knocking you have to be worried. Hopefully its just the pump.

[deetui]

Originally Posted by X53Jay4.8is

Well 12psi is low so more than likely its a pump related problem. Ticking sound in this case is good thing. Knocking you have to be worried. Hopefully its just the pump.

Thank you so much, i asked the mechanic to check the pump and he said there is no way to check it, and has not checked the pump at all, he jumped straight to he thinks i need a new engine, then he told me he is a transmission mechanic and doesn't deal with this problem, my response was why are you touching my car if you don't know what you are doing. god help me,

[dougal]

I have the same issues. My X5 is a 2001 3.0 diesel. I bought it a year ago and it had the same problem as you when the engine gets to normal temp it starts throwing oil pressure warnings when idling. I seems to do it more when idling but in Drive. It also does it more in summer.

I replaced the Oil from 5/30 with 10/40
Brand new Oil Filter (Original BMW)
Brand new Oil Filter housing cap
Brand new original air-con auxiliary fan (mine was dead)
Brand new original Oil Pressure switch (the one on the oil filter housing)

None of these has solved the problem. It still does it.

I got my mechanic to attach a manual Oil Pressure gauge (analog) to the place where the oil pressure switch fits (on oil filter housing) and went for a good drive, long enough to usually trigger the oil pressure warnings and when returned to garage kept the engine running and on idle and the oil pressure was around 10-12 PSI. I read that it is normal.

The engine runs fine, smooth, no black smoke or anything. What could be wrong ?

[wpoll]

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