Oil preassure problems, 2007 Audi A4 B7 2.0 TFSi

[Ztrider]

Hi.

I wonder if anyone can help me out here.
I have an Audi Avant A4 B7 2.0 TFSI 2007.

Short time ago the engine started to get increased valve ticking, I asked around and people kept saying that TFSI engines usually have some valve ticking and drinks a lot of oil, so I did not think too much about this, but I was still a bit unconfortable as the sound was louder than when I bought the car.
A short time later when I needed to do yearly maintenance and oil change the car workshop suggested that I should also get an engine flush with the oil change to clean out old shit, so I did.

Just a week after the oil change the valve ticking increased in volume quite a lot. It now suddenly sounded like a diesel when idling when warm. When the car is cold the ventil ticking is hardly present.

When this happened I called the local car workshop who got the car in the same day and checked the oil pressure, as someone told me that the valves are oil pressure regulated and my not get enough pressure, and it was correct. It was a low oil pressure problems. When the engine is running idle when warm it only gets about 0.5psi, but when the engine revs to more than 2000rpm the oil pressure jumps to 2psi. The low oil pressure warning is not lighting up when idle.

I stopped using the car when I got this message.


Does anyone know what I can do? I have tried to google this, and one of the reasons I can find is that it may be the oil pressure regulator valve, or what it is called.

Does anyone know what this part code is this valve? Any other idea about this problem what I should look into?

[Theiceman]

this thread will likely explain to you what is happening....

https://www.audizine.com/forum/showt...essure+testing

none of us can really say why your oil pressure is low , it is either not enough flow caused by failing oil pump / balance shaft assembly, or bleeding out to fast causing a drop in pressure at bearing / tensioner/ balance shaft, or other consumer of oil pressure.
knowing your milage may help.
Oil flushes do zip on these cars and if you are running quality oil there is almost never " crap " in their that oil flushes can take care of. It is possible however you have a restricted oil pickup tube as we have seen that time to time . but checking that , along with checking pump / balance shaft assemblies is an ugly procedure which requires dropping the sub frame .
There are many many threads on oil pressure on this forum alone so start your search.

[Mke07]

Has your cam follower been checked/changed recently?

[aluthman]

Has your cam follower been checked/changed recently?

While a cam follower failure can lead to balance shaft or oil pump failure, it will not directly cause a low oil pressure condition. Something wlse is blocked, damaged, or worn and causing this.

[Mke07]

Parts of broken follower can't block the oil pickup? Even said he had a "flush" which wouldv'e pushed any debris deeper in the system possibly causing his oil pressure problems. But ok.

[Mke07]

While i was going to leave it, I was genuinely trying to point the op in the right direction trouble-shooting his/her problem, and not only do you sound like a dick in your reply to me, your advice that a follower failure is simply not possible of causing oil pressure problems is terrible. Without codes or other diagnostic tools, it's a fairly basic place to start and a quick thing to check as opposed to dropping the subframe and inspecting the pan or whatever you're suggesting--which it seems was nothing other than to critique me.

[EvolutionArmory]

You don’t like people disagreeing with you very much, huh?

I didn’t take Adam’s reply as being a dick.

The cam follower is not causing the low oil pressure. Something wrong with the oil pump is. Even if the cam follower has a hole in it, the problem is still with the pump if there’s debris stuck in the tube.

Dropping the pan will tell you that there is definitely debris stuck in the pick up tube. Checking your follower only tells you there could be.

An oil pressure test with a gauge is always your first test. You have to verify that the pressure issue is real, first and foremost, before you go any further. If it’s real and not just a sensor failure then you have to drop the pan.

Looking at other things besides the oil pump gets you no further in figuring out why you have low oil pressure is what I believe Adam is saying. I agree with him if that is what he means.

[Theiceman]

I agree with a above. Adam was correct. The cam follower itself has nothing to do with oil pressure. Either in creating flow or creating a restriction to flow like a bearing.
Yes it can possibly cause Indirect problems like you are mentioning. But many people destroy followers and have no oil.pressure issues.
It would have been better if you had elaborated on your first response that included your second one.
We just dont want uninformed people getting the wrong idea that if you " check or change your cam follower" you will have oil.pressure issues.

Your response is short, incomplete, explains nothing, and really means nothing.


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[EvolutionArmory]

Oh, one really obvious possible problem I forgot to mention is the oil filter you use.

You said you changed the oil and filter and the problem got worse. What brand oil filter did you use? If you bought a Fram, WIX, Napa, Mobil 1, K&N or any of the cheap store bought filters, pull it out and put a genuine Audi one in. Google “B7 A4 collapsed oil filter” and look at the pics. You’ll see bunch of filters that look like crushed cans. 🤣 If yours is collapsed, it could be greatly contributing to your oil pressure issue. Pulling out your current filter will also let you inspect it for metal flakes. If you have flakes in your filter, that can also tell you a lot.

Put in a brand new filter if it is anything other than genuine Audi or Mann and then do a legit pressure test with a gauge.

[Mke07]

Not even sure what the point here is. Disagreements are great when constructive and end up helping the op. The other poster didn't offer anything nor did i say or imply anything about the cam follower being the direct cause of oil pressure problems (simply that a failure could have happened) and maybe take a look while you're in there? Where is the harm in that that i needed to be corrected? You guys aren't even sure with all this "i assume adam meant" lmao we're all driving cheap audis that we love and having been on audizine for
10 or so years i've seen that love shine thru but long story short y'all need to take a breath and relax when someone else is genuinely trying to be helpful. I apologize to the OP I hope you have either found the problem or can provide an update so these experts can striaghten it out as I'm done posting here.

[aluthman]

Apparently I’m unintentionally hurting feelings... back to the OP’s problem, you need to pull the pan to see whats wrong. It could be a clogged pickup or worn balance shaft bearings.

[EvolutionArmory]

Sounds like you’re the one that needs to relax to me Mke..

Bye.

[Kevin C]

Parts of broken follower can't block the oil pickup? Even said he had a "flush" which wouldv'e pushed any debris deeper in the system possibly causing his oil pressure problems. But ok.

Picture of a motor I tore down yesterday. Probably not enough to cause a problem but to be fair cam follower bits do end up on the pickup screen. Bigger chunks on a more plugged screen could contribute to a failure. While I dont think its a common scenario or a root cause of a severe low oil pressure problem I wouldn't say it out of the realm of possibility that it could reduce pressure, just not very likely that you could get enough cam follower to block a pickup. But yea, i can see it making things worse.

[Theiceman]

Picture of a motor I tore down yesterday. Probably not enough to cause a problem but to be fair cam follower bits do end up on the pickup screen. Bigger chunks on a more plugged screen could contribute to a failure. While I dont think its a common scenario or a root cause of a severe low oil pressure problem I wouldn't say it out of the realm of possibility that it could reduce pressure, just not very likely that you could get enough cam follower to block a pickup. But yea, i can see it making things worse.

Destroyed cam followers kill oil pressure by destroying bearings more than they do by plugging the pickup I would think.
More of a longer term chronic thing than an acute failure.

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[Ztrider]

Thank you all for suggestions and usefull information. I learned a lot reading the feedbacks.

I have decided to not repair this problem, a friend of me pointed me to a company in Sweden that sells remanufactured engines for a good price.
The reason for this decision was that I need to change the timing belt too as the engine has gone past 187.000 km, and the cost of this plus the cost of troubleshooting and repairing the low oil pressure will make the total cost close to buying a remanufactured engine.
With this I will get a “0”km engine with every wearing part changed, like new timing belt, new rods, new bearings, new gaskets etc etc etc, and with a 12 month warranty.

With the cost and benefits it was not a hard choice to make.


Best regards
Robert