My truck started having a hot restart issue last week. Hoping for the best, I put a new IPR in it to no avail. I have had to be on the road every day lately for work so I didn't have time to properly diagnose it.
That didn't fix it though, so I took it to the local dealer and had a talk with the master diesel tech. He said it sounded like the HPOP.
I picked up the truck the next day and the tech showed me my old HPOP. One of the bolts that holds down the flange of the oil line had pulled the threads out of the aluminum, so the flange wasn't sealing.
I came back after-hours to pick up my truck, and it took about 20 seconds of spinning over to get it started. I figured it could be some air still in the system so I went ahead and drove it away. The next day I made a 300 mile trip, but I didn't shut it off. About 2 hours after the trip, I tried to restart it to no avail. I brought it back to the dealer, and now they say they think it's a bad injector, but they're only 90% sure.

I paid them $2500 for the HPOP (670 parts, remainder was labor but he cleaned unison ring also)
Now it will cost an additional $650 to replace that one injector and I'm supposed to hear back from them later today.
Does anyone know what the book time is to diagnose the HPOP and to replace it? Should I be reaching for the vaseline?

 

Hey I just put a HPOP and 5 injectors in my truck and only spent 1700 and change . There are two bolts that hold the pipe to the hpop i find it hard to belive that one pulled out or the threads were messed up unless someone had been there before . If you still have a leak hot oil leak then it was probably there to start with .The injector can leak where the oil rail goes in the injector . there is a O ring in there that can be replaced . Seems kind of funny its doing the same thing again , maybe didn't get everything the first time .

 

Yea, I'm thinking that they didnt repeat the air test after the HPOP replacement. The threads I saw were definitely pulled, they still had the aluminum stuck to the bolt. I have no idea how they could have done that all by themselves but s**t does happen.

I certainly could have done it myself cheaper, but im in LA traveling daily to AL, and my roll cabinet is south TX. I'm going to be very disappointed if they replaced an injector because of an o-ring.

They claim it's ready again, and it went to $750 vs. $650. I'll find out in the morning if they got it right this time......

 

Good luck with it .