Oil Pump Replacement: Is It Worth It?

Hello,

After I got rid of the stuttering caused by the MSW, it was fun to drive my Audi again. The GRA also makes sense now. But then, as I was driving comfortably on the highway, my eyes fell on the oil pressure gauge, and the feeling of comfort vanished instantly. 2000 RPM and 1.7 bar .

According to the maintenance manual, the 1Z engine should have a minimum oil pressure of 2.0 bar at an oil temperature of 80°C and an engine speed of 2000 RPM. If the oil pressure is lower than this, the oil pump should be replaced.

Oh no - I want to sit IN the car - not lie UNDER it.

When starting the engine (cold), the oil pressure at idle is 4.9 bar. It does not increase even at higher engine speeds.
Then I increased the RPM and got the following results: At 3000 RPM and 80° temperature, the pressure was 2.2 bar. At 4000 RPM and 80° temperature, the pressure was 3.2 bar.

My question is: Does it make sense to replace the oil pump, or are the bearings so worn - mileage 360,800 km - that the pressure is lost ?

Or did I perhaps give my engine too much of a good thing and put the wrong type of oil in it?
Because it makes a "chirping" sound when starting, which disappears after two kilometers, or when the engine speed exceeds 1300 RPM, a mechanic suggested that the problem might be related to the hydraulic system - I always thought they would "tack" - and since I only drive four kilometers in the morning, I should use a 0W oil. I then filled Castrol FORMULA RS 0W-40 - the "chirping" sound remains . The oil consumption is 0.2 liters per 1000 kilometers.

"What comes to mind is that when I slammed on the brakes on the Autobahn, from 160 km/h to 80 km/h, and everything shifted forward, the warning light briefly illuminated. I checked the oil level, and it was about half full. I only knew that the oil pressure could drop during rapid changes in speed from my experience with the Beetle and its shallow oil reservoir."

I've read quite a bit, but I'm still not really clear on what the posts are saying.

MichaelJ wrote:

As I was driving on the highway and suddenly had to brake hard, from 160 to 80 km/h, and everything shifted forward, the warning light briefly came on.

You don't need to worry about that. Every Audi B4 1Z I've driven had the same issue, including mine, even with the oil level at the maximum mark.

Hello,

I would guess that a 0W-xx oil is probably not the best choice for this mileage. I've had good experiences with Castrol RS 10W-60 when dealing with low oil pressure. Changing the oil to try something different is initially cheaper and easier than replacing the oil pump.

Ich glaub, ich muss mir wirklich Sorgen machen. Gestern von Bonn nach Erfurt lief mein Audi stellenweise in der Ebene bis 195 (Tacho) - so schnell hatte ich ihn noch nie. I have.
Of course, I was happy and attributed it to the cleaned MSW. This morning, I checked the oil level - it was at the minimum . Before leaving, the level was at the maximum. So, I burned approximately 1 liter of engine oil in about 400 km. Is this a typical occurrence with 0W-40 oil? Or is the engine subtly signaling its impending demise?
Given the combination of low oil pressure at 80°C and high oil consumption, could the turbocharger bearing be the cause? If it's leaking, wouldn't that also result in pressure loss and oil being burned? Or could the turbocharger fail catastrophically, potentially sending debris flying?

I once looked inside the hose that runs from the crankcase ventilation system to the intake manifold. There wasn't any more oil in it than usual.

The thing about the worn-out hydraulic components isn't entirely wrong.

I once had a Seat Toledo where the oil pressure light would always be on when the engine was warm.
Then I removed the valve covers and let it run.
The oil sprayed out all around because the hydraulic cylinders had too much play in their heads.

However, only a replacement head had provided a solution.

I'm bringing this thread back from the depths.

@MichaelJ
What have you done now?
Oil pump replaced? Hydraulic lifters replaced? Oil type changed?

Hello FAZ,

It took a while, I'm rarely home.

Okay, so I replaced the oil pump.
Insight: A complete waste of money and time.
The oil pressure hasn't changed at all.
It surprised me. I thought that the pump...
nach 350.000KM Verschleiss haben müsste. Saw.
"Inside, it's almost like new. And the exchange was a good deal."
It was worth it. I didn't change the type of oil for now.
The hydrants are still in the storage room, waiting to be installed.
After the frustrating experience with the pump, I...
I thought I wouldn't worry.
If I hadn't retrofitted the oil pressure gauge.
As long as the instrument cluster doesn't light up red, and...
If the oil pressure warning light isn't on, the oil pressure is likely okay.

Greetings.
MichaelJ

Hello,
I wouldn't worry too much yet, because for hydrodynamic lubrication to work, the oil pump must supply sufficient oil to all bearings. The lubricating film then forms due to the rotational movement of the shaft. The oil is drawn into the lubricating wedge, and the shaft essentially floats.

Performance tests on a 1.4L PD engine, 1998.
Different oils with varying viscosities should be investigated for their impact on the stability of the chain tensioner's oscillation behavior (which is pressurized by the engine oil pump) for the balance shaft application.
"Among other things, we used a 0W-30 oil based on esters (which was thin as water even when cold), and under extreme load, the oil pressure in the cylinder head dropped to 0.5 bar when idling. When I called Volkswagen about it, I was told that as long as the pressure in the cylinder head is above 0.3 bar, there is no problem."