Quick easy HPOP fix anyone??
Thread Starter
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Laughing Gas
Joined: Jan 2005
Posts: 920
Likes: 7
From: Mazon, IL
Quick easy HPOP fix anyone??
I have had this intermittent problem for a while, but now it's finally gatting bad. My HPOP resevoir keeps draining overnight. Luckily, I have a Fumoto drain valve, an empty glue bottle, and a crescent wrench in my engine compartment. Yes, I said crescent wrench, not a 3/16" allen wrench, cuz I've pulled the damn plug out to fill it so many times, I finally lost it. Luckily I happened to have a fine thread bolt laying around that fit, and I stole the O-ring from the plugs in my glove box that have been there for years after the SS crossover mod. So, after my long winded delemma, ids there an easy fix? tin foil and a penny? I'm gonna have to pull and rebuild my turbo soon, and I've gotten to the point where I can pull the HPOP in 45 min. or less, but that doesn't get me into the resevoir. What do I need to do OH WISE ONES?? I'm going to bed, but I'm hoping for the miracle cure when I wake up at 6. Thanks in advance for your opinions. Dan
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
A little more info here :...
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.
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.
- The high pressure pump gasket has been modified to seal the standpipe between the pump and front cover.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
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Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
A little more info here :...
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.
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.
- The high pressure pump gasket has been modified to seal the standpipe between the pump and front cover.
Thanks for sharing the pic from Alan. I've been meaning to find this on my truck, but always seem to forget about it when I've got the time.
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Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
more info here..
- 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 (only)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.
looks like the drain back check was moved to the block
Thread Starter
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Laughing Gas
Joined: Jan 2005
Posts: 920
Likes: 7
From: Mazon, IL
OK, Action is totally confusing me. I have an 01 first off. If I crank the motor ALOT after 7 or 8 hours of sitting, it will pump full and start. Lately, if it sits more than 8 hours, i can crank and crank on and off for 20 minutes, and it won't fill. It's been sitting for 2 days now, so when I go out there, I know for sure that it will take a quart of oil to get it running again. I don't think it's a low pressure pump thing, because it drains overnight. And yes actually Action, I have hit it with a hammer, and it still don't work. Chris, thanks for the diagram. Alan actually sent that to me a few months ago, but I lost it. Plus, I can't see where that damn thing is. When I find it though, I will definately take some pics to share. Anyone else out there with the 411??
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
The gasket between the reservoir and the front cover may be leaking. It can leak down inside the front cover without any sign of external leak.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
OK, Action is totally confusing me. I have an 01 first off. If I crank the motor ALOT after 7 or 8 hours of sitting, it will pump full and start. Lately, if it sits more than 8 hours, i can crank and crank on and off for 20 minutes, and it won't fill. It's been sitting for 2 days now, so when I go out there, I know for sure that it will take a quart of oil to get it running again. I don't think it's a low pressure pump thing, because it drains overnight. And yes actually Action, I have hit it with a hammer, and it still don't work. Chris, thanks for the diagram. Alan actually sent that to me a few months ago, but I lost it. Plus, I can't see where that damn thing is. When I find it though, I will definately take some pics to share. Anyone else out there with the 411??
Robin makes a good point about the gasket in the front cover, and Rick was right earlier about the common issues being injector o-rings etc., but that should give you signs of smoke at start up.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
I don't think it's a low pressure pump thing, because it drains overnight.
common issues being injector o-rings etc., but that should give you signs of smoke at start up.
You can pull the covers & look for oil bubbling up from the base if the injector (when hot)IPR DC% should be higher than normal also ..Not sure if it applies to all the motors old & newer,, OBS has a de airiation valve that can come loose ( rarely)....Pic here ...
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Any idea why this would be eliminated? Sounds like a good idea on paper.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
If it comes all the way loose ,causes a no start ,,I 've only heard of it once ...Its captive & won't fall out(completely) until you remove the cover ...