HPOP res drains after HPOP failure.
#1
HPOP res drains after HPOP failure.
If you have a oil gallery passage that is not restricted as designed, you will not be able to build oil pressure. As you crank the engine the HPOP will demand oil from the reservoir. With the low pressure oil being abnormally low the reservoir will not be filled properly. It could be caused from something like I mentioned before or it could be something with your LPOP.
Did you inspect the front cover where the LPOP is located? They have been known to be the problem with low oil pressure.
If it is draining on it's own I would check the anti-drain check ball in the valley. If it is stuck open the oil will drain back to the pan when shut off.
Did you inspect the front cover where the LPOP is located? They have been known to be the problem with low oil pressure.
If it is draining on it's own I would check the anti-drain check ball in the valley. If it is stuck open the oil will drain back to the pan when shut off.
#2
The anti-drain check ball is removed from the valley. If you look from the drivers side down behind the HPOP reservoir you will see a 3/8" or maybe 1/2" square drive plug. You should be able to remove it and the checkball/spring then. If your valley is dirty it may be hard to see. Use an air gun to blow the dirt and grime away and you will see it.
Here is a picture of it.
Here is a picture of it.
#3
I have seen it. Just wasent sure it could be removed. I was looking through the obs forum and I found a pic of a 94-95 HPOP with the check valve built into it and the SPR1 pump I had installed had this check valve in it. I sure hope this did not lead to this premature failure. The valve may have even been deleted and they just used a 15 deg housing to build this SPR1. IDK. Could something have gone wrong in there with this 15deg housing.
#4
At 1:20sec. you can see where the pump looks like its from a 94-95 15deg. pump. Maybe some of that brass is stuck in the check valve.
YouTube - Trashed hpop
YouTube - Trashed hpop
#6
#7
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#10
David, how low is it draining down? All the way? Or just to the bottom of the removed reservoir?
Another thought, would be to change your oil and flush the pan out with some diesel or solvent. Maybe the flow of a thinner liquid might get some of the brass off the bottom of the pan. We have done this with tractors in the past. If you decide to flush it out, use a couple gallons and dump it directly over the cam gear, since that is the where the brass was directed.
Another thought, would be to change your oil and flush the pan out with some diesel or solvent. Maybe the flow of a thinner liquid might get some of the brass off the bottom of the pan. We have done this with tractors in the past. If you decide to flush it out, use a couple gallons and dump it directly over the cam gear, since that is the where the brass was directed.
#11
I can tell you how far from the top it is, bout 3-4 inches from the top. It's like this everytime it sits overnight. So far I've heard o three ways for the res to empty itself, 1 through the check valve, 2 through the seal on the hpop, 3 through the outer injector o ring. The first 2 seem to be fairly easy to rule out and the third one would also explain my low icp numbers in the tunes! But why would this prob show up only after the hpop failure? I ran the truck for a about 80 miles then changed the oil. Do I still need to flush it?
#13
I think your on to something Joey with the reservoir cause when I reinstalled the pump I
Had dropped the washer and had to pull the reservoir and there may be something up with the gasket. I'm thinking that the gasket could if been pinched or have a little tear in it. My fingers are crossed that this is it!
Had dropped the washer and had to pull the reservoir and there may be something up with the gasket. I'm thinking that the gasket could if been pinched or have a little tear in it. My fingers are crossed that this is it!