Oil/HPOP Problem
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Mountain Pass
Joined: Sep 2004
Posts: 192
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From: Marsing, ID
Oil/HPOP Problem
first thing in the morning the truck will fire and then die after a couple of minutes. The HPOP then has to be filled manually before it will restart. This happened twice this morning. Any ideas?
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Mountain Pass
Joined: Sep 2004
Posts: 192
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From: Marsing, ID
That is correct.
Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
The LPOP is new, so that leads me to the pickup tube which is what I was thinking it could be. Is there anything else that could cause this?
Since you've replaced the LPOP, I would be more inclined to go with a cracked pickup tube as the problem.
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Thread Starter
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Mountain Pass
Joined: Sep 2004
Posts: 192
Likes: 0
From: Marsing, ID
When the oil is cold it is thicker which makes it harder for the LPOP to pick it up. When it is warm it is easier for it to pick the oil up. When there is a crack in the pick up tube and the oil is thick from being cold it pulls air a lot easier causing aeration of the oil and no oil in the HPOP. I hope that helps.
Postmaster
Joined: Feb 2004
Posts: 3,266
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From: Levittown
As a test overfill the crankcase approx 2 quarts.
If problem is resolved its the pickup.
You can also jack the back of the truck up
or nose down on a hill parked overnight.
This will submerge the tube for the cold start test.
Just be shure its enough of an angle to submerge the pickup tube.
Bill
If problem is resolved its the pickup.
You can also jack the back of the truck up
or nose down on a hill parked overnight.
This will submerge the tube for the cold start test.
Just be shure its enough of an angle to submerge the pickup tube.
Bill
Senior User
Joined: Sep 2007
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Geez...You guys are pretty unbelieveable with your knowledge. Was simply reading the thread and had to throw a big thumbs up to all you guys, this site really is awesome with it's nearly infinite knowledge and "helpful hands" on these trucks. I can't offer no help on your HPOP issue...but I learn here everyday.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
.
With that said, and having no prior experience with doing this job, this is how I would approach this problem.
Reserve some time and shop space with the intention of pulling the engine, putting it on a stand to flip upside down and do the job right.
Have a new oil pan ready to install.
Before pulling the engine, cut the bottom out of the oil pan and try to fix it through hole you just cut in the pan. it would involve some serious contortions and reaching up to the front of the engine through the bottom of the pan to get at the nut/bolts that hold the pickup tube to the intake of the oil pump.
If this procedure is successful you will be ready to close up the oil pan in less than two hours.
Now weld the pan back together with a wire feed.
Put a couple of quarts of oil in there and look for any leaks.
Paint it and refill.
Go home and enjoy the weekend.
.
Now if for some reason you cannot reach the flange and must pull the engine, so be it..
.
And don't forget to check the torques on the piston cooling oil jets while you are in there.