Duramax Diesels Forum Truck of the Week
  #1  
Old 04-20-2018, 08:28 PM
gmac32 gmac32 is offline
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Default Engine locked up

So far i am at a loss. I pulled out of a gas station this morning and got up to about 2600 rpms and the power started coming on, then let off the throttle and the engine died. No weird noises or anything. Now it is locked up tight. The engine wont turn in either direction. This build has 300 miles on it and was running great. I pulled the cp3 thinking maybe it locked up but now i am thinking the torque converter did something or maybe the tranny pump. I cant think of anything else that would lock the motor that tight. I wont budge either direction. I am at a loss right now. Anybody run into a situation like this?
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Old 04-20-2018, 09:07 PM
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No weird noises, nothing? Just Died?
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Old 04-20-2018, 09:41 PM
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Default Engine locked up

Weird to not have any noise.
Hydro locked maybe?
Have you tried rolling it in either direction with a socket on the crank pulley? Maybe pull the glowplugs when you do this to eliminate a hydro lock and make it easier to roll over.

Last edited by LBZ; 04-20-2018 at 09:47 PM.
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Old 04-21-2018, 05:10 AM
gmac32 gmac32 is offline
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Tried all that. It wont roll either direction on the crank bolt. I am pulling the glowplugs today. I dont see how it would hydrolock that fast and my resevoir is still full
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Old 04-21-2018, 06:10 AM
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I doubt it did but itís not a bad idea to check. It could be locked with fuel too.

More likely itís a hard part that failed or came loose in the engine and jammed something up. Shitty deal.
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Old 04-21-2018, 07:34 AM
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I am wondering if something in the torque converter or the transmission pump locked up. I think the is going to be my next step before I start diving back into the engine.
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Old 04-21-2018, 11:33 AM
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Pull trans and see...
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Old 04-21-2018, 11:38 AM
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Unbolt the converter and then try to rotate by hand. That will eliminate the trans from the equation.
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Old 04-21-2018, 11:43 AM
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Quote:
Originally Posted by rfletes79 View Post
Unbolt the converter and then try to rotate by hand. That will eliminate the trans from the equation.
Going to be hard to unbolt the converter of the motor wonít spin, lol.
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Old 04-21-2018, 12:06 PM
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Quick update....i pulled the starter relay cover off and kept bumping the starter. I got a full revolution out of the motor but it was real real sluggish. So at this point, i can at least un bolt the converter and eliminate that. I have seen alot of things working on diesels for 18 years but nothing quite like this
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Old 04-21-2018, 05:40 PM
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What converter and transmission ? What injectors and cp3 are you running with that much air ? EFI ? How hot are the tunes ? Did you build eng ? Did you have good oil pressure when this happened ? What oil pump ? I am just trying to ask some questions that may spark a response from someone that this may have happened to ! I hope you get help soon !
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Old 04-21-2018, 06:17 PM
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Ok, so something didnt necessarily break, but something certainly froze up.

You've been getting good oil pressure? What does the oil/coolant look like now? Levels ok?

Ive got a couple way-out-there ideas, but it really couldnt be either b/c you've been driving the truck without issue for a bit. Im stumped.
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"BBT" 2003 GMC CC/SB 4x4
12.14@111.15

"Flyin' Brick" 1999 Chevy 1500 RC/SB 2wd -- stalled out, no motivation
2014 Chevy Cruze Diesel -- the DD

Two wrongs dont make a right, but three rights do make a left.

Reality is a matter of perspective.

This forum isn't for the weak of heart.....or wallet.

From mufflerguy on yb,
"Lets build a race car they said. Itll be fun they said. I don't know who "they" are.........but they need a good punch in the face!"
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  #13  
Old 04-21-2018, 06:49 PM
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Converter bolt back out?
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  #14  
Old 04-21-2018, 07:25 PM
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Quote:
Originally Posted by NC-smokinlmm View Post
Converter bolt back out?


I wondered this too but I think spinning it would just wear the head off, make a bunch of noise and or break off.
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  #15  
Old 04-21-2018, 07:28 PM
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Its the "no noise" part of it that has me completely baffled.
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Tom
"BBT" 2003 GMC CC/SB 4x4
12.14@111.15

"Flyin' Brick" 1999 Chevy 1500 RC/SB 2wd -- stalled out, no motivation
2014 Chevy Cruze Diesel -- the DD

Two wrongs dont make a right, but three rights do make a left.

Reality is a matter of perspective.

This forum isn't for the weak of heart.....or wallet.

From mufflerguy on yb,
"Lets build a race car they said. Itll be fun they said. I don't know who "they" are.........but they need a good punch in the face!"
Reply With Quote
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