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Hartwig, you are looking at the drain valve. The valve between the oil from the pump to the cooled, unfiltered oil. Maybe it was not important (except for cooling) to have a perfect seal.
The anti-drain back valve is under the two-screw cover. The one that BPD sells.
Hartwig just called it the drainback valve (instead of simply the drain valve). My impression was that he was intentionally NOT referring to the anti-drainback valve.?.
Both the drain valve and the anti-drainback valve are meant to keep the oil in the oil filter after the engine has been shut off.
Unfortunately LOTS of people call the drain valve the "anti-drainback valve". I think it is a DTR video that started it.
Thanks, let's talk about that valve then.
Thanks for the clarification Jack and Mark.
My thought is this: when the oil filter housing drains (when the engine is off for a few hours) the oil filter housing should hold the oil level. Otherwise we have the effect that the base oil pressure takes a long time to build up.
Then, someone who has such a problem with empty oil filter housing, should renew both valves if I see that correctly.
But I think blicharski1989 has no problem with an empty oil filter housing when he has oil pressure after 3 seconds after fire up.
Then, someone who has such a problem with empty oil filter housing, should renew both valves if I see that correctly.
But I think blicharski1989 has no problem with an empty oil filter housing when he has oil pressure after 3 seconds after fire up.
That would be a reasonable thing to do - IMO anyway. That said, it is easily tested the way you mentioned. Just remove the oil filter and crank until the housing is full - with the drain valve pushed down. It should hold level for a reasonable time period anyway.
I'm not sure the drain valve is as much of a player as the anti-drain valve. The other thing that is goofy with our engines compared to many others is the oil feed to the turbo. In the turbo, the oil is flooded over the bushings, and there is no natural sealing once the engine shuts down. So it becomes the open top of the straw. Drain-down can happen in both the input and output sides of the filter. Although one would hope a whetted filter would have some resistance.
I'm not sure a one-second differential from one start to another has only the valve variable. Several days of sitting may be a better judgment.
- Just swagging. I should have paid more attention to this when I had it all apart.
That drain valve is a big player with a tall oil filter cap and an OEM oil filter!
My experience is that a good one will hold when fully depressed and I have no doubt that the filter housing can empty with the engine off if that valve is bad. Keeping the oil filter housing full is desirable.
I agree that a second or two difference is inconsequential.
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