Need help again
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Senior User
Joined: Nov 2016
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Need help again
I have a 2005 6.0. I just got done doing the HPOP seals, injector o-rings, stand pipes and dummy plugs. I have drove the truck 600 miles since the work with no problems other than a wiring issue I got fixed through help from this forum.
I'm sitting on the side of the road waiting for help to get here. I was driving at highway speeds, and all of a sudden I lost power and got a shake when trying to accelerate. I pulled over and turned it off, and when I went to restart it I got nothing at first, then it went to what seemed like a partial crank followed by a thud. So I'm thinking I just hydro locked it. I waited a few mins and tried again, and it started but had a few knocks for 15 seconds or so, then it ran rough with smoke pouring out of the exhaust (grey then turned kinda white). I the only codes I have are for the egr which I've had unplugged for a long time, and a glow plug code, but when I started it back up, I had no codes. I'm baffled. I did notice I have oil on my oil filter housing at the cap, a little oil had slung on to my wire harness and my intake. I don't even know where to begin!
I'm sitting on the side of the road waiting for help to get here. I was driving at highway speeds, and all of a sudden I lost power and got a shake when trying to accelerate. I pulled over and turned it off, and when I went to restart it I got nothing at first, then it went to what seemed like a partial crank followed by a thud. So I'm thinking I just hydro locked it. I waited a few mins and tried again, and it started but had a few knocks for 15 seconds or so, then it ran rough with smoke pouring out of the exhaust (grey then turned kinda white). I the only codes I have are for the egr which I've had unplugged for a long time, and a glow plug code, but when I started it back up, I had no codes. I'm baffled. I did notice I have oil on my oil filter housing at the cap, a little oil had slung on to my wire harness and my intake. I don't even know where to begin!
Hotshot
Joined: Dec 2014
Posts: 17,824
Likes: 3,103
From: Jersey Shore
Was that a new glow plug code?
Were you missing any nuts or small bolts when you were reassembling the top of the motor?
I'd start by pulling the glow plug with the code and see if cranking the motor over pushes out fuel or not. If not, all glow plugs come out and the motor gets cranked over to find which cylinder has the hydrolock. Then remove the injector from that cylinder and examine the tip for a crack or missing section. I would then use a bore scope to look into that cylinder and see if there is damage to the piston and the cylinder wall.
Were you missing any nuts or small bolts when you were reassembling the top of the motor?
I'd start by pulling the glow plug with the code and see if cranking the motor over pushes out fuel or not. If not, all glow plugs come out and the motor gets cranked over to find which cylinder has the hydrolock. Then remove the injector from that cylinder and examine the tip for a crack or missing section. I would then use a bore scope to look into that cylinder and see if there is damage to the piston and the cylinder wall.
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
So to clarify you have driven it 300 miles since the trouble began with shut down? Or you fixed the oil leak first and now this happened?
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Senior User
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I repaired the HPO leak I had, now this has happened. I'm pretty positive it's hydro locked. I turn the key, the starter engages the motor, but a fraction of a turn into it, there's a thud and the starter just stops. I've watched a few videos on hydro locked engines, but I've never seen one that wouldn't start. I was blowing white smoke this morning, so I'm assuming the egr cooler has dumped coolant. That being said, when this happened it did fire up once after the power loss and I heard a knock from the driver side for just a few seconds. It was running really rough but would smooth out when I gave it gas, and smoke was BILLOWING out the whole time I had it running, which wasn't very long (45 seconds maybe). I had some smoking issues before the HPO leak, and the 300 miles I drove since then, I didn't see much smoke at all. Maybe on startup but not much at all until this morning. To me, it sounds like the egr cooler was going bad before and just went out this morning. But I would LOVE some other opinions. This truck has given me hell for 2 months now!
Hotshot
Joined: Dec 2014
Posts: 17,824
Likes: 3,103
From: Jersey Shore
It could be a cooler, I'm just fixated on injectors where excessive fuel will cause white smoke.
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More Turbo
Joined: May 2015
Posts: 670
Likes: 13
From: Nampa, ID
It sounds like you either have an injector sticking open, dumping fuel in the cylinder or your egr cooler is leaking.
you can rule out egr by pulling the valve and checking for moisture.
Does the exhaust smell like fuel or coolant?
On a side note, please plug your egr valve back in. Your clutch fan will not operate properly with it unlugged. That trick works on the early 6.7 cummins, but not any of the egr-equipped powerstrokes. If you want to keep the egr in place without it being used, use a sct tuner. Even with the "canned tunes" it comes with, there is an option to eliminate egr use. If you are afraid of adding power, you can choose trans only tuning and turn the egr off.
you can rule out egr by pulling the valve and checking for moisture.
Does the exhaust smell like fuel or coolant?
On a side note, please plug your egr valve back in. Your clutch fan will not operate properly with it unlugged. That trick works on the early 6.7 cummins, but not any of the egr-equipped powerstrokes. If you want to keep the egr in place without it being used, use a sct tuner. Even with the "canned tunes" it comes with, there is an option to eliminate egr use. If you are afraid of adding power, you can choose trans only tuning and turn the egr off.
More Turbo
Joined: May 2015
Posts: 670
Likes: 13
From: Nampa, ID
OP, if you have a severly leaking or stuck open injector, it could easily torch the piston. The hydrolocking could also bend a rod. Either way, if you keep running the truck as it is, you will likely turn a minor-ish repair into needing a new engine.
87crewdually has the right idea. Pull the glow plugs and it should be pretty easy to tell what comes out. Be careful though. Whatever is in there is going to come out with a lot of force when you crank it with the plugs out.
Postmaster
Joined: Aug 2015
Posts: 3,910
Likes: 18
From: NW IA
It sounds like you either have an injector sticking open, dumping fuel in the cylinder or your egr cooler is leaking.
you can rule out egr by pulling the valve and checking for moisture.
Does the exhaust smell like fuel or coolant?
On a side note, please plug your egr valve back in. Your clutch fan will not operate properly with it unlugged. That trick works on the early 6.7 cummins, but not any of the egr-equipped powerstrokes. If you want to keep the egr in place without it being used, use a sct tuner. Even with the "canned tunes" it comes with, there is an option to eliminate egr use. If you are afraid of adding power, you can choose trans only tuning and turn the egr off.
you can rule out egr by pulling the valve and checking for moisture.
Does the exhaust smell like fuel or coolant?
On a side note, please plug your egr valve back in. Your clutch fan will not operate properly with it unlugged. That trick works on the early 6.7 cummins, but not any of the egr-equipped powerstrokes. If you want to keep the egr in place without it being used, use a sct tuner. Even with the "canned tunes" it comes with, there is an option to eliminate egr use. If you are afraid of adding power, you can choose trans only tuning and turn the egr off.
Tuned
Joined: Oct 2015
Posts: 392
Likes: 86
From: Roebuck, SC
Careful trying to start/run if it's hydrolocked, that can cause big problems.
Mine did that last Feb, started running like crap, white smoke everywhere. My son was driving it so he parked it and I had it towed home.
When you try to start it once it gets to the hydrolocked cylinder it will struggle to turn past it. If you keep trying, it will fill up with fuel and it will stop turning. If it does start you could damage some very expensive stuff.
I took out all of the glow plugs then cranked it over and the hydrolocked cylinder was obvious. BE CAREFUL when you do this or you'll take a bath in diesel fuel.
Once you find the offending cylinder(s), replace the injector(s).
I was losing coolant also, so while I was at it I replaced the EGR cooler and oil cooler, but that's a different story.
Good Luck.
Mine did that last Feb, started running like crap, white smoke everywhere. My son was driving it so he parked it and I had it towed home.
When you try to start it once it gets to the hydrolocked cylinder it will struggle to turn past it. If you keep trying, it will fill up with fuel and it will stop turning. If it does start you could damage some very expensive stuff.
I took out all of the glow plugs then cranked it over and the hydrolocked cylinder was obvious. BE CAREFUL when you do this or you'll take a bath in diesel fuel.
Once you find the offending cylinder(s), replace the injector(s).
I was losing coolant also, so while I was at it I replaced the EGR cooler and oil cooler, but that's a different story.
Good Luck.