If the pump wasn't changed when the rest of the parts were replaced on the front of the motor, it might be worth looking at installing a new oil pump and seal rings to the pan and pickup tube. If there was a lot of damage to the front of the motor (sounds like there was), the pump could have been damaged as well.
L5P will barely start, then die Please Help
- Thread starter Rdomeck
- Start date
The heat on the cam gear could have warped a seal in the pump as well. You get it back apart yet brother?
I have had to get it out of the shop to get some other work complete. I'll be back on this in a few weeks. I'll dig in to the oil pans(s) and see what's going on. Sounds difficult to remove the upper pan as the transmission has to come out. I'll pull the lower and check out the pick up tube.
I read through the other thread about loosing prime on the oil pump. I do think I have that issue, but certainly have an issue.
I don't think it's too big of stretch to think that the turbo not providing boost could also be the oil pressure. If the oil isn't getting up there, the turbo probably wouldn't spin with no oil going to it.
I read through the other thread about loosing prime on the oil pump. I do think I have that issue, but certainly have an issue.
I don't think it's too big of stretch to think that the turbo not providing boost could also be the oil pressure. If the oil isn't getting up there, the turbo probably wouldn't spin with no oil going to it.
I have been reading up on oil pump replacement. I have to think that with all the damage on the front of the engine that yes, the oil pump is certainly suspect.
It appears to be a press on gear. I'm wondering if that gear is spinning in the shaft that drives the oil pump. If so, I think I might pull the front cover and weld that gear on and put things back together. That would probably take me 4-5 hours and if it works, would save all the work of pulling the trans, oil pans, front suspension, etc.
Then I can figure out the non boost issue.
It appears to be a press on gear. I'm wondering if that gear is spinning in the shaft that drives the oil pump. If so, I think I might pull the front cover and weld that gear on and put things back together. That would probably take me 4-5 hours and if it works, would save all the work of pulling the trans, oil pans, front suspension, etc.
Then I can figure out the non boost issue.
My opinion would be to bite the bullet and just change the pump and all the relates seals for the pickup tube and oil pump. I might even go ahead and do a new pickup tube while I was there just for peace of mind.
With the reports I've seen of the cracked oil pickup tubes, I'd be doing the whole 9 on yours. New pump, seals, and pickup tube.
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Sent from my SM-G990U2 using Tapatalk
Alright guys, I have everything back together...
New....
Oil pump
Pick up tube
Turbo (upgraded)
Still looses oil pressure when warm. Still no boost.
I will install a manual pressure gauge, but don't have high hopes there either.
Next I'll pull the engine and start digging in
Looks like I have another winter project on my hands!
New....
Oil pump
Pick up tube
Turbo (upgraded)
Still looses oil pressure when warm. Still no boost.
I will install a manual pressure gauge, but don't have high hopes there either.
Next I'll pull the engine and start digging in
Looks like I have another winter project on my hands!
New engine in. Has good oil pressure and making boost. From driving in the shop to driving it out was about 20 hours of work. I basically had a long block complete valve cover to oil pan, so had to switch all the other stuff over.
Now, just need to fix my communication issue between the TCM/BCM and the ECM. I suspect that is at the GPCM. Will dig in to that tomorrow.
Now, just need to fix my communication issue between the TCM/BCM and the ECM. I suspect that is at the GPCM. Will dig in to that tomorrow.
Well, my suspicion was correct. I just didn't have the plug at the GPCM in all the way. But....
I had it aligned, hit the interstate for a few miles. Hopped off to turn around to go home. Made about 10 total miles and the engine lost oil pressure suddenly. Could not get it shut off fast enough.
New engine locked up. I'm done with this truck. I suspect an issue in the radiator or oil cooler in front of the radiator.
Anyway, I will cut my losses and just say thatI learned a lot on this one. Move on to the next one!
I had it aligned, hit the interstate for a few miles. Hopped off to turn around to go home. Made about 10 total miles and the engine lost oil pressure suddenly. Could not get it shut off fast enough.
New engine locked up. I'm done with this truck. I suspect an issue in the radiator or oil cooler in front of the radiator.
Anyway, I will cut my losses and just say thatI learned a lot on this one. Move on to the next one!
I'm kinda banging my head here. What would be the same oiling wise between the engines?
You are correct though, there is no engine oil cooler up front.
You are correct though, there is no engine oil cooler up front.
Now that is really strange. What all did you swap over from the original? I’ve rebuilt from salvage hundreds of duramax trucks and never had a second engine fail.
Whats the history on said long block that was installed? How many miles before the lockup? Any noise before oil pressure drop out?
If you immediately shut it down when the oil pressure light came on, i find it hard to believe its locked up from that few seconds of no oil pressure unless it was ran on real low pressure for a long while.
If you immediately shut it down when the oil pressure light came on, i find it hard to believe its locked up from that few seconds of no oil pressure unless it was ran on real low pressure for a long while.
I purchased the long block in Michigan last Thursday. 9,000 miles on it. Came out of a salvaged truck is all I know.
Drove this engine maybe 30 miles. Closely watching the oil pressure.
Swapped over the EGR stuff and Turbo stuff. Turbo is new and was on the old engine maybe 20 mins of run time. Front brackets, accessories, etc. the only thing I did with the long block is pull a valve cover to peak inside. All looked clean and good. No loose valves.
I had looked down at the oil pressure maybe 10 seconds before it shut off due to no oil pressure. It was around 50-55.
I put a socket on the front of the engine and it is locked up. Still has oil in it.
I use Bosch oil filters on everything. I probably put 3 on the old engine with all the stuff I did. Only one on this engine, but no way 4 oil filters would be bad in that way.
Drove this engine maybe 30 miles. Closely watching the oil pressure.
Swapped over the EGR stuff and Turbo stuff. Turbo is new and was on the old engine maybe 20 mins of run time. Front brackets, accessories, etc. the only thing I did with the long block is pull a valve cover to peak inside. All looked clean and good. No loose valves.
I had looked down at the oil pressure maybe 10 seconds before it shut off due to no oil pressure. It was around 50-55.
I put a socket on the front of the engine and it is locked up. Still has oil in it.
I use Bosch oil filters on everything. I probably put 3 on the old engine with all the stuff I did. Only one on this engine, but no way 4 oil filters would be bad in that way.
My oil level is right where it was when I put oil in.
I agree something doesn't add up. For what it's worth, the old engine did the same thing with the original turbo that had not been touched.
I agree something doesn't add up. For what it's worth, the old engine did the same thing with the original turbo that had not been touched.