low oil level in resivior
#1
02-18-2011, 05:32 PM
#2
02-18-2011, 06:31 PM
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#3
02-19-2011, 04:09 PM
the truck is a 1995, we put in new alliant ac injectors new bosch hpop new ipr valve & new uvc gaskets. after start up & a good hard run of 40 miles i let it sit overnite & checked next morning found oil leak in valley. removed everything again cleaned up & used a ford gasket this time. drove truck hard again let truck sit overnite again. no external leak but resivior is still down. wondering where does the oil go? so where is the check valve in this engine thank you for your reply R R ranch friskyjake
#4
02-19-2011, 04:33 PM
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95 had 2 different hpop's. The wrong one will certainly cause a low oil level. The 94 pump has the check valve built into the pump. The 96 and up check valve is in the timing cover. It's real important to use the right one. If you don't have a check valve now then that could be the problem. You can quickly ID a 94 motor by the fill plug on top of the HPOP reservoir. 94 has a pipe threaded plug. 96 and up has an o ring seal straight thread plug, usually it takes an allen wrench also on the 96 and up.
#5
02-19-2011, 04:50 PM
Here are 2 pics if the check valve ...
#6
02-19-2011, 04:52 PM
95 had 2 different hpop's. The wrong one will certainly cause a low oil level. The 94 pump has the check valve built into the pump. The 96 and up check valve is in the timing cover. It's real important to use the right one. If you don't have a check valve now then that could be the problem. You can quickly ID a 94 motor by the fill plug on top of the HPOP reservoir. 94 has a pipe threaded plug. 96 and up has an o ring seal straight thread plug, usually it takes an allen wrench also on the 96 and up.
#7
02-19-2011, 05:01 PM
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I don't think 94 models have those but I could be wrong. I know I'm correct about the check valve though. Or anti drain back valve. 94 style is in the hpop. 96 is in the timing cover. The pumps are interchangeable other than that.
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
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#8
02-19-2011, 05:12 PM
I don't think 94 models have those but I could be wrong. I know I'm correct about the check valve though. Or anti drain back valve. 94 style is in the hpop. 96 is in the timing cover. The pumps are interchangeable other than that.
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
#9
02-19-2011, 05:16 PM
I don't think 94 models have those but I could be wrong. I know I'm correct about the check valve though. Or anti drain back valve. 94 style is in the hpop. 96 is in the timing cover. The pumps are interchangeable other than that.
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
This thread shows the 94 valve location. https://www.ford-trucks.com/forums/6...drainback.html
#10
02-19-2011, 05:24 PM
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The valve in that pic on the front of the engine block is the short circuit valve. It lets oil pressure go to the HPOP reservoir on start ups. That's it. The 96 and up front cover was completely redesigned to incorporate the standpipe and the necessary plumbing to keep oil in there when it's shut off. 94 type engines only rely on the check valve built into the HPOP. That's why people only have trouble with it on 94 and 95 models. If you have drainback problems on a newer ones then you really messed something up.
#11
02-19-2011, 05:24 PM
According to this , you are right on the earlier pumps
Still don't think there was ever one in the front cover ...
High Pressure Oil Pump The high pressure pump has had the drain check valve deleted. This brings the variation of high pressure pumps used on the DIT to three. The pumps may be identified by the absence or presence of the anti-drain check valve.
* On 1994 1/2 and 1995 model year engines up to serial number 187099, the initial high pressure pump did have a drain check valve but did not have an edge filter. The edge filter was part of the injection pressure regulator.
* On 1995 model year engines starting with serial number 187100, up to serial number 201680, the high pressure pump did have a drain check valve and an integral edge filter. The edge filter was deleted from the injection pressure regulator.
* On 1996 model year engines starting with serial number 201681, the high pressure pump does not have a drain check valve but continues to have an integral edge filter.
* On 1994 1/2 and 1995 model year engines up to serial number 187099, the initial high pressure pump did have a drain check valve but did not have an edge filter. The edge filter was part of the injection pressure regulator.
* On 1995 model year engines starting with serial number 187100, up to serial number 201680, the high pressure pump did have a drain check valve and an integral edge filter. The edge filter was deleted from the injection pressure regulator.
* On 1996 model year engines starting with serial number 201681, the high pressure pump does not have a drain check valve but continues to have an integral edge filter.
#12
02-19-2011, 05:25 PM
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