Low oil pressure S60, 2012, D3 163hp(120kw)

[Eltazar]

Hello, I replaced all the sensors, the valve, tried a thicker oil, regenerated DPF (most likely there was diesel in the oil from the firing tests), replaced the oil pressure pump. In VIDA I noticed a momentary drop in pressure, after dynamic drive (literally 2 seconds) to 170 kPa, at this moment an error occurs (engine system, service required. and low oil pressure error), after these seconds the pressure returns to 200kPa. Maybe some of you had a similar problem

Volvo s60, 2012, D3 163HP(120kw)

[Krons]

Diesel threads aren’t real common here, hopefully somebody can come along and offer some help. My thought goes to the oil pump — uncertain how hard that is to get to on the diesels.

On the five cylinder petrol engines it’s very common at higher mileage for the oil pick up O-rings to get hard and start sucking air. I don’t know if the oil pick up design is the same on your diesel. I had to drop the oil pan on my 02 S60 2.4t to fix this.

[volvolugnut]

If I am following your original post correctly, you did several service items, including replacing the oil pump. When you started after the repairs, you had initial low oil pressure?
This sounds like normal short delay until the oil pump primed. Do I understand the situation correctly?
volvolugnut

[Eltazar]

Diesel threads aren’t real common here, hopefully somebody can come along and offer some help. My thought goes to the oil pump — uncertain how hard that is to get to on the diesels.

On the five cylinder petrol engines it’s very common at higher mileage for the oil pick up O-rings to get hard and start sucking air. I don’t know if the oil pick up design is the same on your diesel. I had to drop the oil pan on my 02 S60 2.4t to fix this.

I'll check the O-ring soon, do you think it makes sense since the error only appears when the engine is warm and only at idle speed?

[Eltazar]

If I am following your original post correctly, you did several service items, including replacing the oil pump. When you started after the repairs, you had initial low oil pressure?
This sounds like normal short delay until the oil pump primed. Do I understand the situation correctly?
volvolugnut

When I started repairing, the error was the same as it is now, it appeared at the same time. I took the car to an unauthorized Volvo service center in Poland, they stated that according to the procedure, the sensor and oil pump had to be replaced. After the replacement, the error did not disappear, so I took the car from there. They tried to trick me into disassembling the entire engine.

[volvolugnut]

I would try to connect a mechanical pressure gauge to the oil system for independent reading of oil pressure. This would confirm low oil pressure without the sensor or electrical connections questions.
volvolugnut

[Eltazar]

I would try to connect a mechanical pressure gauge to the oil system for independent reading of oil pressure. This would confirm low oil pressure without the sensor or electrical connections questions.
volvolugnut

The pressure actually drops, it was checked with a pressure gauge.

[volvolugnut]

I have no experience with this diesel engine, however, a large V8 gasoline engine I drove had low oil pressure after the engine got warm. The solution in that case was to replace the crankshaft bearings. The old bearings had excessive clearance.
volvolugnut