LB7: Head Gasket ........ ended up being bad engine thread !

TrentNell

TrentNell

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Sarted Diagnosing my 2001 gmc this weekend , so fare the motor was hydro locked and after pulling the glow plugs out it blew the water out when i turned it over , and the truck now turns over freely . The truck is getting torn down today to start the repair. Paying my buddie Dimitri to do alot of the work because i have been so busy lately :hug: I will keep you guys posted on what we find when we get the heads off , I am curious to see what else we will find . So far i am really happy that the short blocks seems to be good , but wont know untill we visually look inside and check piston protrusion and a few pother things .

Still couldnt get it to fire up though and at this point i dont have an answer to why , it had fuel pressure cranking maybe too much like stuck reg or injector ( got up to 6000 psi ) so hopefully there is not more damage that we cant see . didnt do a compression check just wanted to get started and not wasting time messing with it .
 
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S Phinney

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Trent I would do that compression test before I took it apart. You will find the cylinder and maybe enough info that you don't have to take it apart. If the comp is down too low that would be why it wouldn't crank. Hope it ok for you and nothing major.
 
TrentNell

TrentNell

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S Phinney said:
Trent I would do that compression test before I took it apart. You will find the cylinder and maybe enough info that you don't have to take it apart. If the comp is down too low that would be why it wouldn't crank. Hope it ok for you and nothing major.
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I know the head gaskets are bad , with out a doubt . So it needs to be tore down anyway . it would crank over after i pulled the glow plugs , after all the water came out anyway :D , just not fire . didnt spend enough time to try and diag because it would be wasted because i already verified enough for it to have to be tore down .
 
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TrentNell

TrentNell

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the motor is ready to come out , Dimitri was busy today :) . we are putting new gaskets , ARP head studs , My set of LBZ rods i have laying around and what ever else we find bad , already found that the turbo was bad :rolleyes: going to throw my twins on it untill i get the race motor done :coolspot:
 
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JoshH

JoshH

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TrentNell said:
the motor is ready to come out , Dimitri was busy today :) . we are putting new gaskets , ARP head studs , My set of LBZ rods i have laying around and what ever else we find bad , already found that the turbo was bad :rolleyes: going to throw my twins on it untill i get the race motor done :coolspot:
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Can we place bets on whether or not the twins come off? :D
 
delong_1

delong_1

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are you going to throw in a s/c kit also while its apart:D

you lifted dd is going to be as fast or faster than my dd/drag truck:eek:
 
TrentNell

TrentNell

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:toetap::toetap::toetap::toetap:




Its the only feisable option , i dont have another stock turbo to put on it :joker:

plus the trans will be stock so it should keep me on good behavor ;)
 
JoshH

JoshH

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TrentNell said:
:toetap::toetap::toetap::toetap:




Its the only feisable option , i dont have another stock turbo to put on it :joker:

plus the trans will be stock so it should keep me on good behavor ;)
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Justify it however you need to. Next thing you know, there'll be a post about how you have some new twins coming for your race truck, and since the twins are already on the DD, there's no sense in pulling them off... :angel:
 
TrentNell

TrentNell

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JoshH said:
Justify it however you need to. Next thing you know, there'll be a post about how you have some new twins coming for your race truck, and since the twins are already on the DD, there's no sense in pulling them off... :angel:
Click to expand...

:hifinger:



:rofl:
 
JoshH

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You know I only say that, because that's exactly what would happen with me. :hug:
 
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