Engine Locked Up
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Joined: Jun 2010
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Engine Locked Up
2004 F350 6.0 Powerstroke
I started off having a struggling crank. It turned out that the pulley on my ac compressor froze. So I replaced it and sure enough got a strong crank.
In order to get to the ac compressor i took off the radiator, shrode, fan, etc.
Well I fired it up. It took awhile but it finally fired up. Then I saw a oil leak and heard a screacing noise. I replaced the HPOP.
I then hooked up the radiator and fired it up again. The oil leak stopped but the noise came back. I turned off the engine and now the crank is locked up. I tried to crank it again but it won't turn.
I don't know if it is hydro locked or internally locked up. I didn't have any engine coolant because I drained it to take off the radiator. Could that be my problem, how can I unlock it if it is hydro locked.
I have taken off the glow plugs and tried to turn it by hand but it is still locked.
HELP PLEASE!
I started off having a struggling crank. It turned out that the pulley on my ac compressor froze. So I replaced it and sure enough got a strong crank.
In order to get to the ac compressor i took off the radiator, shrode, fan, etc.
Well I fired it up. It took awhile but it finally fired up. Then I saw a oil leak and heard a screacing noise. I replaced the HPOP.
I then hooked up the radiator and fired it up again. The oil leak stopped but the noise came back. I turned off the engine and now the crank is locked up. I tried to crank it again but it won't turn.
I don't know if it is hydro locked or internally locked up. I didn't have any engine coolant because I drained it to take off the radiator. Could that be my problem, how can I unlock it if it is hydro locked.
I have taken off the glow plugs and tried to turn it by hand but it is still locked.
HELP PLEASE!
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
is the belt on it still. if so take the belt off and turn it over by hand.
also please varify whay part you replaced that was leaking oil.
you say the high pressure pump. that is located behind / under the turbocharger.
also please varify were you saw oil leaking from.
to un hydro lock an engine you need to remove all glowplugs
also please varify whay part you replaced that was leaking oil.
you say the high pressure pump. that is located behind / under the turbocharger.
also please varify were you saw oil leaking from.
to un hydro lock an engine you need to remove all glowplugs
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The belt is off. I replaced the HOOP under the turbo. I as an oil leak on top of the manifold so I assumed it was the HOOP. When I try to turn it I can't. I already took off all the glow plugs and it is still locked. I'm wondering if I have to replace the engine.
Fleet Mechanic
Joined: Jun 2006
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LPOP?
The only other thing I can think of that would make a noise approximately 30 seconds after start with the belt off is the low pressure oil pump.
Did you have normal oil pressure when it ran for 30 seconds?
Sounds like the LPOP has lost suction for some reason. If it did and the motor locked, then your motor is probably toast.
DSMMH
Did you have normal oil pressure when it ran for 30 seconds?
Sounds like the LPOP has lost suction for some reason. If it did and the motor locked, then your motor is probably toast.
DSMMH
Lead Driver
Joined: Sep 2007
Posts: 8,180
Likes: 669
From: Scio, OR
The motor can't run without a functioning LPOP. At least not longer than it takes to deplete the oil in the HPOP reservoir. Once that's gone, there is no oil to fire the injectors. I don't know how long that'd be, but I'd guess it'd less than a few seconds.
However I agree. If he has all the belts off and can't turn the engine with the "big socket on the front of the crank pulley" method, his engine is screwed.
However I agree. If he has all the belts off and can't turn the engine with the "big socket on the front of the crank pulley" method, his engine is screwed.
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Logistics Pro
Joined: May 2004
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30 seconds with no coolant....no problem. 30 seconds without oil pressure in a motor that produces so much heat is a big problem......I hope not but it could be your motor is jacked.
If you have already removed the glow plugs and tried to manually crank it over and it won't......it might be some very bad news for you
If you have already removed the glow plugs and tried to manually crank it over and it won't......it might be some very bad news for you
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Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
The only other thing I can think of that would make a noise approximately 30 seconds after start with the belt off is the low pressure oil pump.
Did you have normal oil pressure when it ran for 30 seconds?
Sounds like the LPOP has lost suction for some reason. If it did and the motor locked, then your motor is probably toast.
DSMMH
Did you have normal oil pressure when it ran for 30 seconds?
Sounds like the LPOP has lost suction for some reason. If it did and the motor locked, then your motor is probably toast.
DSMMH
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