[J.Peart]

hi, i was at my local wrecker today and found a 84 k5 blazer witha 6.2 diesel in it, it looked like it got t-boned and since i have seen it driving round town beofre im pretty sure the engine is ok .

anyways, it hada j code manifold so i pulled that for my blazer. now im wondering is this engine a c code with a j code manifold or has a j code been transplanted into it?

what should i look for to be able to tell? i wanna pull some parts off it if it is a j code( specifically the injector pump, but if there is anything else that would be good to have let me know )

 

[murphyslaw]

in the vin i think its the 5th from the last letter will either be a C or a J that will tell ya

 

[jdemaris]

hi, i was at my local wrecker today and found a 84 k5 blazer witha 6.2 diesel in it, it looked like it got t-boned and since i have seen it driving round town beofre im pretty sure the engine is ok .

what should i look for to be able to tell? i wanna pull some parts off it if it is a j code( specifically the injector pump, but if there is anything else that would be good to have let me know )

I guess since the motor might not be original, you don't know for sure the year of the engine. Type of glow-plug controller, type of bottom crankshaft pulley, and type of starter-motor might give a hint to the engine vintage. 1988 was the last year GM used direct-drive starters on any of their diesels - after that they were all gear-reduction. GM changed over from a solid-steel bottom crankshaft pulley to a rubber-cushioned pully late 1985. With glow-plug controllers - GM used the "fast glow thermal" system from 1982 - 1984. This system has the controller installed into a cylinder head with a separate relay. 1985 and up 6.2s use a untized relay/controller mounted at the central-rear of the engine.

Here's a list of 1984 injection pumps. Note that any pump with 1.2cSt at the end has an Arctic cold-weather/thin fuel option installed.

1984 J-code pumps (Heavy Duty)
DB2829-4266 14077133 1984 P Truck (Motor Home) C/K
DB2829-4267 14077179 1984-85 CUCV (Military), HD C/K, D Truck C/K DB2829-4520
DB2829-4268 14077135 1984 HD G Van G
DB2829-4269 14077136 1984 HD C/K Truck - ALT. C/K
DB2829-4270 14077137 1984 HD G Van - ALT. G
DB2829-4305 14077134 1984 CUCV (Military), HD C/K, D Truck C/K DB2829-4267 No
DB2829-4355 23500014 1984 HMMWV (Military) C/K DB2829-4471
DB2829-4386 23500256 1984-85 CUCV (Military), HD C/K, D Truck - 1.2 cSt C/K
1984 C-code pumps (Light Duty)
DB2829-4274 14077168 1984 LD C/K Truck C/K DB2829-4425
DB2829-4275 14077171 1984 LD C/K Truck - ALT. C/K DB2829-4426
DB2829-4276 14077169 1984 LD G Van G DB2829-4427
DB2829-4277 14077170 1984 LD G Van - ALT. G DB2829-4428
DB2829-4309 14077185 1984 LD C/K Truck - CAL. C/K
DB2829-4310 14077186 1984 LD G Van - CAL. (Man. Trans.) G
DB2829-4366 23500077 1984 LD G Van - CAL. (Auto. Trans.) G DB2829-4439

 

[J.Peart]

thanks for you input, looks like it was a c code witha j code manifold unfortunately.