Low oil pressure - AAZ

[vako]

It might be off the topic a bit but i'm curious if bad turbo bearing (it jas a lot of play and already leaks oil) can cause low hot oil pressure? And the second question is about emptying the oil gallery after turning off the engine for a while and it takes 2-3 secinds to turn off idiot light  ( ia have the engine swapped in suzuki viara so 0.1 bar sender is on the head). I have mahle oil filter and oil pupmp that was within the specs when i rebuilt the engine...

[92EcoDiesel Jetta]

You have probably written about this but I must ask why did you change to ball bearings on the intermediate shaft? That would be the area I would focus on. Is it possible to measure the pressure drop across the bearings?

[Gizmoman]

Is that a 300 psi gauge?  Boudon tube gauges are most accurate at the middle of scale, not at extreme ends. I'd suggest getting a 0- 20 psi gauge and plumb it in when engine is hot (so you don't pin it from cold starting) to confirm you are really getting 10 psi hot idle.

It was a gauge I had and I was checking for ANY oil pressure.
As I mentioned, the gauge was tested but I didn't feel the need to go into details.

The gauge was tested to 90 psi using a very accurate pressure regulator I have on my paint gun supply.
10 - 10 - OK, 15- 15 -  OK, 20 - 20 - OK . . . 90 OK. Done.
Next you'll say the application is oil and I used air to test - blah bla bla. Jeeze, hopefully all your clouds don't have brown smelly linings .

The bearings are fine. Yes it's seems crazy but at least I attempted to improve possibly the weakest link on this engine (save the tiny key on the stock crank sprocket - now a TDI "D"). Only time will tell.

The oil pressure is perfect. The gauge sender had been failing since day one and finally quit - displaying zero oil pressure. Even if the gauge is off by 5 psi (which it's not), it beats zero any day!

I checked both exhaust and compressor piping - no oil - not even a slight film (turbo is brand new). I am using zero oil with the exception of a few tiny leaks If any bearing had failed to the point of creating zero oil pressure, the engine would have abruptly quit.

Think I'm ready for that three week road trip. She's about to get a new batch of fresh slippery Rotella and new filter!
Again, thanks for the feedback - all of it.

[92EcoDiesel Jetta]

Is that a 300 psi gauge?  Boudon tube gauges are most accurate at the middle of scale, not at extreme ends. I'd suggest getting a 0- 20 psi gauge and plumb it in when engine is hot (so you don't pin it from cold starting) to confirm you are really getting 10 psi hot idle.

It was a gauge I had and I was checking for ANY oil pressure.
As I mentioned, the gauge was tested but I didn't feel the need to go into details.

The gauge was tested to 90 psi using a very accurate pressure regulator I have on my paint gun supply.
10 - 10 - OK, 15- 15 -  OK, 20 - 20 - OK . . . 90 OK. Done.
Next you'll say the application is oil and I used air to test - blah bla bla. Jeeze, hopefully all your clouds don't have brown smelly linings .

The bearings are fine. Yes it's seems crazy but at least I attempted to improve possibly the weakest link on this engine (save the tiny key on the stock crank sprocket - now a TDI "D"). Only time will tell.

The oil pressure is perfect. The gauge sender had been failing since day one and finally quit - displaying zero oil pressure. Even if the gauge is off by 5 psi (which it's not), it beats zero any day!

I checked both exhaust and compressor piping - no oil - not even a slight film (turbo is brand new). I am using zero oil with the exception of a few tiny leaks If any bearing had failed to the point of creating zero oil pressure, the engine would have abruptly quit.

Think I'm ready for that three week road trip. She's about to get a new batch of fresh slippery Rotella and new filter!
Again, thanks for the feedback - all of it.

Sorry, I missed the part that the gauge sender had failed and the part where you calibrated the gauge. Good to hear all is OK. You went through hell with this project, glad it is finally on the road with everthing sorted out. Good luck and have a great trip. post some pics.