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

6.5 upgrade but needs repaired first

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  #1  
Old 08-25-2010, 07:44 PM
rescueeskew354's Avatar
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Default 6.5 upgrade but needs repaired first

I have a 93 6.5 turbo with 147000 on it it has been a great truck up until a week ago . The water pump failed as well as the radiator and the thermostat housing all at the same time . Before all that the truck ran between 170 and 180 temp range . That being said after i repaired all the above problems the truck has a blown head gasket or cracked block or both . The truck now has a starting problem (it is getting fuel ) and the temp runs about 210 and above depending on idle or highway travel . I can smell coolant in the exhaust and the radiator overflows in to the overflow chamber after engine shut down . My plan is to fix this old truck it has always been the reliable underdog . I have always wanted to make it a sleeper truck , but i need to fix the underlying problem . So my questions are 1) does the injection pump have to come of to repar the heads if so what is the best manual to buy for the repairs . 2) do i need to replace the head bolts again what is the best . 3) why is the truck starting hard now ( never had this problem before . 3) what injectors will give more power and are the best . 4) Does the head gasket kit come with all the gaskets for this job

Now my upgrade plans are to replace glow plugs ,diffrent turbo , 4 inch exhaust ,boost controler , new fan , harmonic balancer , roller cam and rockers . This is all in the future but only if the motor is salvagable . Can any one help or get me pointed in the right direction
 
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Old 08-25-2010, 10:07 PM
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No the injection pump doesn't need to come off. You will have to remove all the injection lines you can get them off just takes a little to get the bottom ones off. You should replace the bolts I would put studs in it. The truck may be hard to start because of having a blown head gasket. I would stay with stock injectors. Most kits are just the head gaskets but you may be able to find a complete up end kit. When you pull the head off most likely it will be cracked between the valves. Unless the crack is big it is just a surface crack and will not leak. Make sure it is dead flat and clean before you put them back on.
 
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Old 08-25-2010, 10:36 PM
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Thanks 2MuchJunk . I have found a complete head gasket set from SS Diesel supply . All I could find where head bolts on their web site any good place that carries the studs . I wanna do this right and i dont plan on cutting any corners . And are their any special tools I will need for this project
 
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Old 08-25-2010, 10:42 PM
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No special tools. I would go to heath diesel they sell head studs.
 
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Old 09-08-2010, 07:50 PM
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i agree with 2muchjunk.............. also look into the thicker head gasket along with head studs..... injectors i would go with marine injectors more fuel flow then stock ........im doing about the same thing but im putting my 6.5 in my 84 chevy pick-up, prob wouldnt hurt to have ur pump rebuilt and calibrated to marine injectors as well
 
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Old 09-08-2010, 11:07 PM
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The only problem with marine injectors is they raise the torque curve up to a higher rpm than the stock injectors.
 
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Old 09-08-2010, 11:17 PM
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I slightly disagree on the pump. There are 3 nuts and 3 bolts to remove it. Makes it much easier to work on the heads, and you won't have to worry about bending lines. You can't mess the timing up on it cause it fits only one way in the gear.
 
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Old 09-09-2010, 05:28 PM
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The pump will only fit in the gear one way but it can be adjusted to the housing it bolts to. If you remove the pump it will have to be re timed.
 
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