HPOP still no start.
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
You can remove one of the oil rail plugs in each head and see if it is full. When the HPOP and reservoir are full, it fills the rails and oil will continue to seep from the rail port due to gravity. This also help purge any air in the rails. Reinstall the plug and leave it cracked slightly loose (o-ring barely touching) and crank over. You should see oil coming out around the plug.
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Junior User
Joined: Mar 2006
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I had oil coming from plugs when removed. I put back in and left loose. Turned the truck over and never seen any leaking from plugs. They were really loose. So what should I look for now, getting frustrated need truck to be running by Wednesday.
Chad
Chad
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Joined: Jan 2011
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From: Puget Sound
- Check IPR tin nut to make sure it is "snug", but not over tightened.
- Remove IPR to verify the plunger is free to "rattle".
- You can remove the Exhaust Back Pressure sensor (use two wrenches, it will bend) and mounting plate/bracket to verify the torque on the HPOP drive.
These are the things you can try before abandoning hope on the HPOP.
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Junior User
Joined: Mar 2006
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Are you talking about the torque on the Bolt with the big washer? We torqued it 25 lbs I know. I'm gonna take IPR out this afternoon and clean real good. I'll try the exhaust back pressure sensor idea if the IPR cleaning doesn't work.
Thanks for the ideas.
Chad
Thanks for the ideas.
Chad
Lead Driver
Joined: Mar 2010
Posts: 5,505
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From: Woodbridge, Ontario, CA
Ummmmmm....... the last time I checked (which is MANY moons ago, since I haven't seen any 7.3L trucks lately due to their age), the torque spec for that bolt is 95 ft-lbs. which is about the same tightness you would go for wheel nuts on a passenger car.
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Junior User
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I may of looked at it wrong but I thought it was 95 Inch/lbs. it's easy to get too so ill go back in and torque it more if it needs it.
Chad
Chad
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Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
If you tightened the HPOP gear bolt to only 25 ft-lbs, the gear is slipping on the pump. Tighten it to 95 ft-lbs or at least until the motor turns and binds up under compression. Do this and your starting problem should be remedied.
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Junior User
Joined: Mar 2006
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The first time I took pump out the Check ball fell out on other side of the rod of the non servicable plug. Will this damage the pump? I took it back out and put ball back where it supposed to be, but still won't crank.
Lead Driver
Joined: Mar 2010
Posts: 5,505
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From: Woodbridge, Ontario, CA
The paragraph quoted above is likely the exact reason why it won't fire (due to not building up enough ICP psi).
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