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Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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  #1  
Old 03-15-2013, 11:28 AM
Diesel Fan

   

Default 6.5 TD Problem Child

Hey so I bought this 1995 6.5 about a month ago and i went trough a list of things to check before buying and it checked out. But ever since i bought it has been one problem after another. The truck already had all front end suspension replaced a new rad, alternator, batteries, Relocated PMD, injector pump recently,transmission and fuel tank. First problem was the harmonic balancer giving out on the drive home, then about a week later i noticed the turbo was over boosting (new boost solenoid and wastewgate actuator needed), then i noticed the engine had alot of blow by and so much of it it has been popping the oil dip stick out while driving, next the truck started to die on me while driving so i had the lift pump replaced and somehow it is still getting air in the fuel lines so theres still something up there. Also when I open that brass t valve for 10 seconds it does stall out but it also leaks the fuel during that. My question is, motor swap? or fix all the problems left ( if i can figure out what exactly is wrong that is).
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  #2  
Old 03-15-2013, 09:19 PM
Mase's Avatar
Diesel Enthusiast
Status: Just something about a DETROIT

   

Default Problem Child

I rebuilt one 2 months ago with some help really alot of help but if you swap used motor you still don't know what you have.If you don't have to buy IP you can rebuild one fairly cheap using good parts if you shop around a little bit almost every thing on mine came from SS Diesel supply,Heath diesel, rock auto and GM .But hopfully you can get info from somebody else here and it wont come to that.It is still pricey but if I can get another 304k its well worth it.

Mase's Sig:94 K2500 3/4 ton 4x4 extended cab longbed 4:10 gears vin F PMD relocated. K/N cold air intake 4in exhaust open, Homemade TM. GM makes em Detroit shakes em 4L80E
1985 GMC sierra 4.3 First vortec 4 barrel and headers factory.

Last edited by Mase; 03-15-2013 at 10:15 PM..
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  #3  
Old 03-15-2013, 11:30 PM
Diesel Fan

   

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Yeah i might be able to buy a parts truck with 216k (kilometers) if i can get it running and see how it runs i might just do that but i gotta diagnose alot on this thing. also 2 glow plugs have failed on me..not my lucky truck
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  #4  
Old 03-20-2013, 03:04 PM
Diesel Fan

   

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NEW PROBLEM truck started up this morning after letting the glow plugs cycle and then died shortly after. pumped the gas put on a battery charger and got it running. died 15 mins later while driving after i hit the brakes to take it out of cruise control. got it goin again after pumpng the gas pedal and drove it another 3 mins to school 3 hours later i got in it started it up and drove it for about 5 minutes no problems. half hour later went to start it she started up and then died about a minute after. now she wont start at all just turns over. no light in dash come on when key is turned but radio and lights work. any ideas?
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  #5  
Old 03-20-2013, 03:38 PM
Mase's Avatar
Diesel Enthusiast
Status: Just something about a DETROIT

   

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Check pos cable from battery to starter.Mine came lose before some times I had ignition some times I did not

Last edited by Mase; 03-20-2013 at 03:46 PM..
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  #6  
Old 03-21-2013, 08:55 PM
Mayhem's Avatar
Diesel Wrench
Status: The stupid shall be punished

   

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Check the ground cables especialy the one on the rear of the passenger head

Mayhem's Sig:1993 Chevrolet K2500 6.5 Vin code F
NV4500 single mass flywheel
Snorkel Mod
No PMD here bub
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  #7  
Old 03-22-2013, 05:40 PM
Diesel Fan

   

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Im thinkin it might just be my own truck because i got it running after jumpig the one battery that had the kill switch wired up to it. But when i was driving it home i hit the brakes and turned the turn signal on and the truck shut down and wouldnt start again.
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  #8  
Old 03-26-2013, 04:40 PM
Diesel Fan

   

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The kill switch in this truck was wired into the wire that went pos to pos on the batteries. it was also wired into the fuse box and alternator. I dont think its the problem has anyone had problems before due the wiring in the steering column for the ignition and turn signals / cruise. Because it was when i hit the brakes to take it out of cruise that it would die or when i put my turn signals on. I got all the daash apart and i am not sure where to start
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  #9  
Old 03-27-2013, 06:00 PM
Newbie

   

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Originally Posted by Levis95 View Post
Hey so I bought this 1995 6.5 about a month ago and i went trough a list of things to check before buying and it checked out. But ever since i bought it has been one problem after another. The truck already had all front end suspension replaced a new rad, alternator, batteries, Relocated PMD, injector pump recently,transmission and fuel tank. First problem was the harmonic balancer giving out on the drive home, then about a week later i noticed the turbo was over boosting (new boost solenoid and wastewgate actuator needed), then i noticed the engine had alot of blow by and so much of it it has been popping the oil dip stick out while driving, next the truck started to die on me while driving so i had the lift pump replaced and somehow it is still getting air in the fuel lines so theres still something up there. Also when I open that brass t valve for 10 seconds it does stall out but it also leaks the fuel during that. My question is, motor swap? or fix all the problems left ( if i can figure out what exactly is wrong that is).
yeah if you have blowby past the seals you will pressurize the crankcase. The engine is worn.
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  #10  
Old 03-27-2013, 09:21 PM
racer55's Avatar
Diesel Bomber
Status: familiar with the 6.5 and then some

   

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For the blowby make sure the CDR is working properly or replace it.

For air in the fuel system testing,replace the IP fuel return line with clear diesel ratd hose and watch for bubbles in that line while idling.Bubbles indicate air intrusion.

Air while the engine runs is most often getting somewhere between the fuel level in the tank and the LP-were the Orings on the line in good shape when the LP was replaced?
sending units develop holes as well.

If hard starting due to air is the concern,the water in fuel sensor Oring or the fuel heater Oring in the filter housing are usually the culprits of air/fuel leaks after an extended sitting period.

Your steering column trouble sounds like it could be a faulty ignition switch-they are multi contact switches that leave a dead dash/ECM but the blower motor and radio work fine.
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