E46 M3 S54 Vanos pressure tests

[LatinSkllz]

He’s around, but pretty sure he gave up on forum life.

Even IG and e-mail life. I could never get him to help out. He would randomly reply, I’d be ready to purchase once confirming what he thought was the issue.

Good luck.


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[stash1]

Even IG and e-mail life. I could never get him to help out. He would randomly reply, I’d be ready to purchase once confirming what he thought was the issue.

Good luck.


Sent from my iPhone using Tapatalk

Dunno, I've heard from ppl that he can be a little difficult to get a hold of sometimes...but I know that he travels a fair amount for work and that it takes him to some remote locations.

[jet_dogg]

Even IG and e-mail life. I could never get him to help out. He would randomly reply, I’d be ready to purchase once confirming what he thought was the issue.

Good luck.


Sent from my iPhone using Tapatalk

I've not purchased from several people who refuse to provide adequate service. It's not hard replying to emails and the sporadic responses are even worse with the avoidance of question answering topping my list.

Very few people actually know how to run a business and provide some semblance of customer service which is a lost art especially these days.

[Santino]

As rpm increasing, pump output is increased too, and so even with some oil being used by the vanos pistons movement, I think with a normal working ACC the system pressure should not drop that much as shown on post #32. Look at post #1 video.

Finaly my vanos electrovalves came back from cold solder fix, so i have tested the oil pressure as You mentioned
So on startup it mesured 4bar, and slowly when getting hotter it droped to 2 bar on idle, but as soon as i touch the gas it bumps to 5 bar, and blips ups when reving
i should mention i have changed the oil pump piston using the burkhart engenerig unit, as mine was worn at 100k miles when ive chenged to rod bearings.
also im waiting till the end of the month for the ordered vanos pressure acumulator, as they are out in all EU

[maupineda]

I think you are confused, you are measuring OIL pressure at the engine, the VANOS shall have 100bar at all times, idle, load, etc. Where did you attach the gauge, I assume you did it at the oil filter housing.

That said, you have pretty healthy pressure, the pressure at idle should be 1bar, you have a bit more but I don't see that as a bad thing at all.

To measure VANOS pressure, you plug the indicator at the VANOS oil line that goes to the accumulator, and you need a different gauge, the one you have will blow out as VANOS pressure is 1400+ psi.

BTW, I don't think VANOS would affect engine oil pressure at all as it has a feed valve that I think is max 1 bar (cannot find the source where I read this, but makes sense since the VANOS makes full pressure at idle, so it shall be at least 1bar at the infeed valve at all times)

[Santino]

I think you are confused, you are measuring OIL pressure at the engine, the VANOS shall have 100bar at all times, idle, load, etc. Where did you attach the gauge, I assume you did it at the oil filter housing.

That said, you have pretty healthy pressure, the pressure at idle should be 1bar, you have a bit more but I don't see that as a bad thing at all.

To measure VANOS pressure, you plug the indicator at the VANOS oil line that goes to the accumulator, and you need a different gauge, the one you have will blow out as VANOS pressure is 1400+ psi.

BTW, I don't think VANOS would affect engine oil pressure at all as it has a feed valve that I think is max 1 bar (cannot find the source where I read this, but makes sense since the VANOS makes full pressure at idle, so it shall be at least 1bar at the infeed valve at all times)

Yes i have done the vanos oil pressure test, its in on the previous page, but i was geting pressure dips when reving and Sapote recomended to make a oil pressure test to check if the presure dipps also apear in the oil system ore ist it only the fault of the vanos accumulator
regarding the oil pressure i found info that it should peak at 4 bar so it apears that mine is showing 1bar higher pressure on idle ore on revs

[sapote]

regarding the oil pressure i found info that it should peak at 4 bar so it apears that mine is showing 1bar higher pressure on idle ore on revs

If the gauge was connected to the oil filter lid then the reading may not be the same as where the stock oil sensor. Interesting to see the measured pressure at the sensor on the oil filter housing.

[Santino]

If the gauge was connected to the oil filter lid then the reading may not be the same as where the stock oil sensor. Interesting to see the measured pressure at the sensor on the oil filter housing.

it was connected to the blank oil supply, next to the oe pressure sensor

[Arinb12]

Results from my Vanos tests carried out recently, (UK custom guage kit off EBay).
Its somewhat more thorough than the one I'd posted out back in 2016, where I had faults causing v low vanos oil pressure and Ive defined some simple benchmarks, this so that with others data, we could look at establishing indicators that can help us determine whether our systems are at full health.
Am keen to get your feedback (and data points) to work this one further up, please comment.

Could you tell me how you attached this. I got the parts you linked to. Do I just replace the bolt, retain the washers and use some PTFE on the guage threads?

[Santino]

Not normal. I believe it dropped (as the DME changing the VANOS timing when rpm changing) because there is no accumulator pressure reserve in the old tank with empty N2 gas. Need a new ACC bottle.

Finally i have replaced a new ACC bottle for the vanos, it still dips pressure whem hiting the gas, but never drops below 100bar (i have operating pressure at 115bar now)
But the leek down is now great, previuos it took a minute to reach 0, now it drops to 60bar after turning off, and keeps this pressure for 2 hour now as i write this.
Figured it could be helpfull for the comunity

[maupineda]

I also replaced the accumulator and I hold now pressure too after engine shutdown, though I did not test for how long, but before it dropped to zero pretty much immediately. I even thought about getting the S62 accumulator that has a builtin solenoid to keep pressure until next start but thought it was just unnecessary and too much hazle to adapt.

[sapote]

. I even thought about getting the S62 accumulator that has a builtin solenoid to keep pressure until next start but thought it was just unnecessary and too much hazle to adapt.

It shouldn't take long for the vanos pump to build up pressure in the ACC before driving, so I'm not sure why the need to have shut off solenoid. This is useful for the SMG as it save the electric pump wear and tear, but vanos pump runs all the time anyway.

[sapote]

Finally i have replaced a new ACC bottle for the vanos, it still dips pressure whem hiting the gas, but never drops below 100bar (i have operating pressure at 115bar now)

It's a mystery why vanos pressure dips as rpm shoot up; could be that the pump disk has abnormal leaking rate with low output rate. Stock disk and 4 pistons?

[Santino]

It's a mystery why vanos pressure dips as rpm shoot up; could be that the pump disk has abnormal leaking rate with low output rate. Stock disk and 4 pistons?

Yes the disk and 4 pistons inside it are stock, only drilled to a smaller diameter to avoid breaking the tabs.
edit after 7 hours pressure still holds at 60bat
i will be taking out the vanos unit to polish it outside, so in anycase will check the disk more thourogh for wear

[maupineda]

It's a mystery why vanos pressure dips as rpm shoot up; could be that the pump disk has abnormal leaking rate with low output rate. Stock disk and 4 pistons?

It is actually pretty logical, as you stab the gas pedal the splines more than likely move to adjust timing based on rpm and load change, that uses oil to move the splines which causes the pressure drop inside the unit until the pressure stabilizes again. Having a working acc and pump would just make those dips shorter as oil supply is almost instantaneous.