Hpop reservoir drains out - Ford Powerstroke Diesel Forum
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Old 08-21-2013, 08:24 AM
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Hpop reservoir drains out

I've noticed if I let my truck set over night the hpop reservoir drains dry. It fires up in the morning so I know the pickup tube and lpop are working. But when cranking it fires up for about 2 secs then dies. No oil pressure for the first cranking or idle. Reset the key and wait for the light to go out again and she starts and runs fine with normal pressure.

Any thoughts why it drains out?


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Old 08-21-2013, 08:39 AM
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Drain back valve in the HPOP... What do you mean dry?
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Old 08-21-2013, 08:47 AM
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Dry as in, if you let it set overnight and take the plug out of the top of the reservoir, there's no oil in it.


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Old 08-21-2013, 06:09 PM
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if the hoop res. was dry you'd crank and crank til the resivor filled with oil.
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Old 08-21-2013, 06:27 PM
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Yep that's what happens. It cranks for a while then starts for a few seconds then dies.


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Old 08-23-2013, 04:54 AM
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Quote:
Originally Posted by Schnot View Post
I've noticed if I let my truck set over night the hpop reservoir drains dry. It fires up in the morning so I know the pickup tube and lpop are working. But when cranking it fires up for about 2 secs then dies. No oil pressure for the first cranking or idle. Reset the key and wait for the light to go out again and she starts and runs fine with normal pressure.

Any thoughts why it drains out?


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Could be any one of many things. Could be your IPR, leaky HPOP hose or a connection under the valve cover is loose.

I ran into that issue and it ended up being one of the lines in the head was loose and leaking.

Do you see any oil in the valley of the engine?
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Old 08-23-2013, 05:39 AM
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Originally Posted by rufushusky View Post
Could be any one of many things. Could be your IPR, leaky HPOP hose or a connection under the valve cover is loose.

I ran into that issue and it ended up being one of the lines in the head was loose and leaking.

Do you see any oil in the valley of the engine?
No oil in the valley. I just resealed the whole HPOP and the oil lines with the master kit from Dieselorings.com because I had some slow leaks from the lines. I also replaced the Non-Serviceable Plug because it looked as if that was leaking too.

This drainback problem was happening before I did all of that.

What connection under the valve cover are you talking about. The only connections under there are electrical except for the injector itself.
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Old 08-23-2013, 05:51 AM
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Quote:
Originally Posted by Schnot View Post
No oil in the valley. I just resealed the whole HPOP and the oil lines with the master kit from Dieselorings.com because I had some slow leaks from the lines. I also replaced the Non-Serviceable Plug because it looked as if that was leaking too.

This drainback problem was happening before I did all of that.

What connection under the valve cover are you talking about. The only connections under there are electrical except for the injector itself.
Shouldn't have said connections... it was the oil drain plugs on the rail..

Under Valve Cover Oil Rail Drain Plug with Viton O-ring

O-rings dried out.
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Old 08-24-2013, 01:59 AM
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Originally Posted by rufushusky View Post
Shouldn't have said connections... it was the oil drain plugs on the rail..

Under Valve Cover Oil Rail Drain Plug with Viton O-ring

O-rings dried out.
Oh yeah good call. They didn't seem bad when I swapped injectors earlier this summer but I will get some new ones and try it.


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Old 08-24-2013, 10:58 PM
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There is a spring loaded check ball in the HPOP reservoir that I believed is a pressure relief valve that drains excess oil back to the crank case. If that was installed backwards somehow or the spring is weak/clogged with crud it will allow the oil to drain out.
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