Thread: Building the Ultimate 6.2L

As an enthusiastic junkyard scavenger, I would like to know, what would the best combination of parts be to build a strong running, reliable 6.2L N.A. diesel? What is the best block castings, the best head castings, and the best years for fuel injection equipment? I'd like to keep my eyes peeled at the local U pull and get the best pieces.

I hear alot about the 599 casted blocks from the '92-'93 year as being the best.And from what i've read the '82 block is also a strong contender.

Regarding engine parts,I feel that clevite bearings and pistons are the way to go.They always make quality engine parts and you could use a gear drive or stick with a typical double roller timing chain and sprocket assembly.You can get total seal piston rings and also equip the engine with ARP head studs.Clevite head bolts also do a great job on the 6.2.

Many guys use the 18:1 version pistons to lower the compression ratio but new clevite slugs for a N/A engine will do just fine.I see alot of engine parts on ebay at great prices.

Regarding the fuel injection pump you could use a J code pump with the J code intake manifold.That pump is tweaked a little higher than C code pumps and has a different delivery valve internally.

But i'm unsure of the J code serial numbers for the 6.2 injection pump.It does start with DB2 831-????.But I don't know the last four digits.If it were a 5.7 diesel pump I could tell you right away......LOL.A google search will most likely reveal the J code pump serial numbers.

As always, dieselolds, you are a wealth of diesel GM information. Thank you!

Thanks a bunch argo for the good word.It's always appreciated.Let me know if you need further help.

The DB2-831-4911 is the mechanical pump for the 92-93 turbo 6.5 . Think that was around 190-200 HP . The DB2-831-5088 was around 175 HP and in some of the mid 90's G vans .

Wouldn't that pump cause excessive smoking on a NA 6.2?

Originally Posted by argo

As an enthusiastic junkyard scavenger, I would like to know, what would the best combination of parts be to build a strong running, reliable 6.2L N.A. diesel? What is the best block castings, the best head castings, and the best years for fuel injection equipment? I'd like to keep my eyes peeled at the local U pull and get the best pieces.

The "best" block is a low mileage block, regardless of casting #s. They all develop main-bearing-web cracks overtime. Model-year 1982 blocks were rumored to have a higher-nickel content and were therefore stronger than the rest. I suspect it's true, but cannot say for sure. I've tested a few with the "grinder and spark color" test and the metal is different. How different, I don't know. The newest 6.5 blocks being made now are again, high nickel.
If you find a 1982 engine they had a few special "problems." The threads in the heads for the injectors don't match any later years. Also, they had a head-gasket leak problem due to an extra cooling port. GM sold a kit to fix that required plugging the extra port.

When I look for used engines and parts, mileage is the #1 issue, that is often hard to verify due to the many 5-digit odometers. If an engine is known to have 150K mile or more, assume it has cracks until you pull the pan and prove otherwise. This goes for crankshafts as well. Crankshafts are not intended to be reground unless you have a way of rehardening the crank journals. When new - they are surface hardened. Nothing beats a low mile, original crank - or perhaps a new one.

There are still many low-mile 6.2s to be found. Many died earlly in life due to bad injection pumps, failed 700R4 transmissions, etc., and got parked. Problem now is find those that haven't made it to the crusher. I've got half a dozen up in my field, all with less than 80K original miles, and never paid more than $250 for any of the complete trucks.

For a block, check anything you find for webcracks. Regardless of casting #, if it's not cracked when you find it, it will give you many miles.

All the cranks are cast-iron - but differ by the type of rear-main seal used. 1982 - 1991 use two-piece rear seals and all use the same cranks. 1992 and up use a one-piece seal and a different crank.

For heads - stay away from big-valve heads. They have less metal between the intakes and exhaust and crack very easy. Most HD J-code engines from the mid to late 80s have the small valves. Heads with casting # 14077162 have small valves. Heads with casting #s 14028901 are light-duty with big valves. The best and most crack resistant heads that fit the 6.2 are the newest 6.5 heads - made in China. That being said, only early C-code heads have the small swirl-chambers that provide the best potential for good fuel mileage. So, it depends if you want power, or good mileage.

With injection pumps - for the most part, the age doesn't matter. All pumps made before mid-1984 have one plastic part that routinely failed. It was eliminated after that time. But, by now, any of those pumps should of failed, been fixed and upgraded - unless you find a low mileage old rig that has been sitting for years. C-code and J-code pumps are pretty much the same except for a slightly different delivery valve in the J-code pumps.

Many people prefer the wide-open air-intake manifolds that the J-code engines have - so you can keep that in mind. Personally, I don't think it makes any difference in power - but make up your own mind.

One expensive item you ought to grab whenever you see one - is the rubber-shock-cushioned crankshaft pulleys. They cost a fortune, work very well, but were only used from 1985 and newer (approx.). For v-belt drives, they differ depending if the 6.2 had AC or not. 1988 1/2 ton trucks, and a few other later 6.2s use serpentine belt setups, so those pulleys are different.
Dealer price new for any of those pulleys is around $400, and they cost over $300 aftermarket. They make the belt-drive work much nicer on any 6.2.

The 4911 pump is intended for the turbo diesel application.I've worked on a few 5088 pumps in G series vans but that pump could be adapted to the N/A 6.2 engine.The 5088 pump was found on N/A 6.5 diesels.The DB2 831 number means it has .31 diameter plungers while a DB2 829 pump has .29 diameter sized plungers.

Originally Posted by dieselolds

The 4911 pump is intended for the turbo diesel application.I've worked on a few 5088 pumps in G series vans but that pump could be adapted to the N/A 6.2 engine.The 5088 pump was found on N/A 6.5 diesels.The DB2 831 number means it has .31 diameter plungers while a DB2 829 pump has .29 diameter sized plungers.

The pump with the .29" plungers will make more than enough fuel to blow up a 6.2, so I can't imagine any good use for the bigger .31" plunger pump for a 6.2 in street use.

Here are few numbers for anyone that wants them.

GM Injection Pump Application and Supersession Guide
6.2 Liter Applications
Model GM P/N Year Application
Engine
System Superseded by Changesâ€*â€*
DB2829-4090 14050587 1982 LD C/K Truck C/K DB2829-4126 Note 1
DB2829-4091 14050588 1982 HD C/K Truck C/K DB2829-4153 Note 1
DB2829-4126 14050587 1982-83 LD C/K Truck C/K — —
DB2829-4127 14050526 1982 LD Truck - ALT. C/K — —
DB2829-4151 14061645 1983 P Truck (Motor Home) C/K — —
DB2829-4153 14050588 1982-83 HD C/K & P Truck C/K — —
DB2829-4187 14066280 1983 LD & HD C/K Truck - ALT. C/K — —
DB2829-4188 14066277 1983 LD G Van G — —
DB2829-4189 14066278 1983 HD G Van G — —
DB2829-4190 14066279 1983 LD & HD G Van - ALT. G — —
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
Note 2 except (d)
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 — —
DB2829-4274 14077168 1984 LD C/K Truck C/K DB2829-4425 Note 3
DB2829-4275 14077171 1984 LD C/K Truck - ALT. C/K DB2829-4426 Note 3
DB2829-4276 14077169 1984 LD G Van G DB2829-4427 Note 3
DB2829-4277 14077170 1984 LD G Van - ALT. G DB2829-4428 Note 3
DB2829-4305 14077134 1984 CUCV (Military), HD C/K, D Truck C/K DB2829-4267
Note 4
DB2829-4309 14077185 1984 LD C/K Truck - CAL. C/K — —
DB2829-4310 14077186 1984 LD G Van - CAL. (Man. Trans.) G — —
DB2829-4355 23500014 1984 HMMWV (Military) C/K DB2829-4471 Note 5
DB2829-4366 23500077 1984 LD G Van - CAL. (Auto. Trans.) G DB2829-4439 Note 5
DB2829-4386 23500256 1984-85 CUCV (Military), HD C/K, D Truck - 1.2 cSt C/K
DB2829-4521 Note 2
DB2829-4410 23500251 1985 HD C/K & P Truck C/K DB2829-4544 Note 2
DB2829-4411 23500252 1985 HD G Van G DB2829-4509 Note 2
DB2829-4412 23500253 1985 HD C/K Truck - ALT. C/K DB2829-4510 Note 2
DB2829-4413 23500254 1985 HD G Van - ALT. G DB2829-4511 Note 2
DB2829-4425 14077168 1985 LD C/K Truck C/K DB2829-4502 Note 2 except (d)
DB2829-4426 14077171 1985 LD C/K Truck - ALT. C/K DB2829-4506 Note 2 except (d)
DB2829-4427 14077169 1985 LD G Van G DB2829-4503 Note 2 except (d)
DB2829-4428 14077170 1985 LD G Van - ALT. G DB2829-4507 Note 2 except (d)
DB2829-4437 23500273 1985 LD C/K Truck - CAL. C/K — —
DB2829-4439 23500275 1985 LD G Van - CAL. (Auto. & Man. Trans.) G — —
DB2829-4440 23500276 1985 HMMWV (Military) - 1.2 cSt C/K DB2829-4523 Note 2
DB2829-4441 23500277 1985 HD C/K & P Truck - 1.2 cSt C/K DB2829-4512 Note 2
DB2829-4471 23500398 1985 HMMWV (Military) C/K DB2829-4524 Note 2
DB2829-4502 23500400 1986-87 LD C/K Truck C/K — —
DB2829-4503 23500401 1986-87 LD G Van G — —
- 2 - P.B. 119R6
â€*â€* At the time of supersession parts and/or calibration changed as noted. Other changes may
have occurred since.
Engine Systems
C/K — Injector - 84 mm length, 6 mm dia. nozzle valve; Lines - 2.50 mm I.D.; Delivery Valve
Retraction - 30mm3
G — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.00 mm I.D.; Delivery Valve
Retraction - 22.5mm3
* — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.36 mm I.D.; Delivery Valve
Retraction - 22.5mm3
Notes
1 — Timing (Ref. S.B. 375)
2 — (a) Transfer Pump Filter; (b) Advance Piston (S.B. 393R3);
(c) Delivery Valve Stop & Spring (S.L. 250R2); (d) Governor Spring
3 — (a) Min-Max Governor Pushrod; (b) Non-grooved Metering Valve (S.B. 336R4)
4 — Housing; Drive Shaft Retention (S.B. 419)
5 — Min-Max Governor Pushrod

Model GM P/N Year Application
Engine
System Superseded by Changesâ€*â€*
DB2829-4506 23500404 1986-87 LD C/K Truck - ALT. C/K — —
DB2829-4507 23500405 1986-87 LD G Van - ALT. G — —
DB2829-4509 23500407 1986-87 HD G Van G DB2829-4646 Note 6
DB2829-4510 23500408 1986-87 HD C/K & P Truck - ALT. C/K — —
DB2829-4511 23500409 1986-87 HD G Van - ALT. G DB2829-4648 Note 6 exc. (b)
DB2829-4512 23500410 1986-87 HD C/K & P Truck - ALT. C/K — —
DB2829-4520 23500413 1986-87 CUCV (Military), HD D Truck C/K — —
DB2829-4521 23500414 1986-87 CUCV (Military), HD D Truck - 1.2 cSt C/K — —
DB2829-4523 23500415 1986-89 HMMWV (Military) - 1.2 cSt C/K — —
DB2829-4524 23500416 1986-89 HMMWV (Military) C/K — —
DB2829-4544 23500346 1986-88 HD C/K & P Truck C/K — —
DB2829-4548 23500587 1986-88 Industrial - 12V (Clark) C/K — —
DB2829-4554 23500931 1988-89 LD C/K Truck (Auto. Trans.) C/K — —
DB2829-4555 23500933 1988-89 LD C/K, R/V Truck - ALT. (Auto. Trans.) C/K — —
DB2829-4574 23501280 1987-88 Generator - 24V (Clark), 1800 RPM C/K Made from
DB2829-4548
—
DB2829-4581 23500932 1988-89 LD C/K Truck (Man. Trans.) C/K — —
DB2829-4582 23500934 1988-89 LD C/K Truck - ALT. (Man. Trans.) C/K — —
DB2829-4612 23501993 1987-88 Industrial - 24V (Clark), 3600 RPM C/K Made from
DB2829-4548
—
DB2829-4636 23500941 1988-89 LD G Van (Auto. Trans.) G — —
DB2829-4637 23500942 1988-89 LD G Van (Man. Trans.) G — —
DB2829-4638 23500943 1988-89 LD G Van - ALT. (Auto. Trans.) G — —
DB2829-4639 23500944 1988-89 LD G Van - ALT. (Man. Trans.) G — —
DB2829-4646 23502177 1988 HD C/K, R/V, P Truck & G Van G DB2829-4723 Note 7
DB2829-4647 23502178 1988 HD C/K, R/V, P Truck & G Van - 1.2 cSt G DB2829-4724
Note 7
DB2829-4648 23502179 1988 HD C/K, R/V, P Truck & G Van - ALT. G DB2829-4725
Note 7
DB2829-4655 23502229 1988-89 Industrial - 12V (Clark), 3600 RPM, 1.2 cSt C/K Made
from
DB2829-4548
—
DB2829-4701 23503123 1988-89 LD R/V (Auto. Trans.) C/K — —
DB2829-4723 23503998 1989 HD C/K, R/V, P Truck & G Van G — —
DB2829-4724 23503999 1989 HD C/K, R/V, P Truck & G Van - 1.2 cSt G — —
DB2829-4725 23504000 1989 HD C/K, R/V, P Truck & G Van - ALT. G — —
DB2829-4779 10149610 1990 HD C/K, R/V, P Truck & G Van G — —
DB2829-4780 10149619 1990 HD C/K, R/V, P Truck & G Van - 1.2 cSt G — —
DB2829-4781 10149620 1990 HD C/K, R/V, P Truck & G Van - ALT. G DB2829-4877
Note 8
DB2829-4790 10149609 1990 LD C/K, R/V & G Van (Auto. Trans.) G — —
DB2829-4791 10149621 1990 LD R/V Truck & G Van (Auto. Trans.) - ALT. G — —
DB2829-4792 10149611 1990 LD C/K Truck (Man. Trans.) G — —
DB2829-4793 10149618 1990 LD C/K Truck (Man. Trans.) - ALT. G — —
DB2829-4801 10149623 1990 Industrial - 12V, 3600 RPM G — —
DB2829-4802 10149646 1990 Generator - 24V, 1800 RPM G Made from
DB2829-4801
—
- 3 - P.B. 119R6
GM Injection Pump Application and Supersession Guide
6.2 Liter Applications
â€*â€* At the time of supersession parts and/or calibration changed as noted. Other changes may
have occurred since.
Engine Systems
C/K — Injector - 84 mm length, 6 mm dia. nozzle valve; Lines - 2.50 mm I.D.; Delivery Valve
Retraction - 30mm3
G — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.00 mm I.D.; Delivery Valve
Retraction - 22.5mm3
* — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.36 mm I.D.; Delivery Valve
Retraction - 22.5mm3
Notes
6 — (a) Calibration; (b) Air Timing; Drive shaft Retention (Ref. S.B. 419)
7 — (a) Min-Max Governor Spring; (b) Transfer Pump Regulator Spring; (c) Advance Spring;
(d) Calibration
8 — (a) Advance Piston; (b) Spring Side Advance Plug; (c) Advance Spring; (d) Calibration;
(e) T.P. Regulator
(f) Housing Pressure Regulator/Return Connector

Model GM P/N Year Application
Engine
System Superseded by Changesâ€*â€*
DB2829-4803 10149647 1990 Industrial - 24V, 3600 RPM G Made from
DB2829-4801
—
DB2829-4804 10149648 1990 Industrial - 12V, 1.2 cSt G Made From
DB2829-4801
—
DB2829-4833 10149622 1990 Marine (Peninsular Diesel) G — —
DB2829-4840 10149679 1990 LD C/K Truck (Auto. Trans.) - ALT. C/K — —
DB2829-4847 10149679 1990 HMMWV (Military) G DB2829-4878 Note 8 exc. (e) & (f)
DB2829-4848 10149634 1990 HMMWV (Military) - 1.2 cSt G DB2829-4879 Note 8 exc.
(e) & (f)
DB2829-4875 10149610 1991 HD C/K, R/V, P Truck & G Van * — —
DB2829-4876 10149619 1991 HD C/K, R/V, P Truck & G Van - 1.2 cSt * — —
DB2829-4877 10149620 1991-92 HD C/K, R/V, P Truck & G Van - ALT. * — —
DB2829-4878 10149633 1990½ HMMWV (Military) G — —
DB2829-4879 10149634 1990½ HMMWV (Military) - 1.2 cSt G — —
DB2829-4894 10183929 1991 LD C/K, R/V & G Van * — Notes 9 & 11
DB2829-4895 10183930 1991 LD C/K, R/V & G Van - ALT. * — —
DB2829-4959 10191495 1990 Marine - 3600RPM * — —
DB2829-4974 14098680 1991 Marine (Peninsular Diesel) - Turbo (250 hp) * — —
DB2829-4977 10154613 1992 LD C/K, R/V & G Van * DB2829-4894 Note 10
DB2829-4978 10154614 1992 LD C/K, R/V & G Van - ALT. * DB2829-4895 Note 10
DB2829-4979 10154615 1992 HD C/K, R/V, P & G Van * DB2829-4875 Note 10
DB2829-4980 10154616 1992 HD C/K, R/V, P & G Van - 1.2 cSt * DB2829-4876 Note
10
DB2829-4981 10154617 1992 HD C/K, R/V, P & G Van - ALT. * DB2829-4877 Note 10
DB2829-5048 10154678 1992 P Truck - 2500 RPM (120 hp) * — Note 10
DB2829-5050 10154699 1992 P Truck - 2600 RPM (135 hp) * — Note 10
DB2829-5055 10154685 1993 LD C/K, R/V, & G Van - ALT. * — Notes 10 & 11
DB2829-5056 10154684 1993 LD C/K, R/V, & G Van * — Notes 10 & 11
- 4 - P.B. 119R6
GM Injection Pump Application and Supersession Guide
6.2 Liter Applications
â€*â€* At the time of supersession parts and/or calibration changed as noted. Other changes may
have occurred since.
Engine Systems
C/K — Injector - 84 mm length, 6 mm dia. nozzle valve; Lines - 2.50 mm I.D.; Delivery Valve
Retraction - 30mm3
G — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.00 mm I.D.; Delivery Valve
Retraction - 22.5mm3
* — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.36 mm I.D.; Delivery Valve
Retraction - 22.5mm3
Notes
8 — (a) Advance Piston; (B) Spring Side Advance Plug; (c ) Advance Spring; (d) Calibration;
(e) T.P. Regulator
(f) Housing Pressure Regulator/Return Connector
9 — 1991 LD C/K, R/V, and G Van do not require S.O. I. Sensor
10 — Start of injection (S.O.I.) Sensor, P/N 26605, beginning with 1992 MY (S.B. 469)
11 — (a) High Force HPCA Solenoid; (b) Housing Pressure Regulator/Return Connector; (c)
Calibration
12 — (a) Unpotted Encoder Sensor; (b) Ceramic Rollers
Model GM P/N Year Application
Engine
System Superseded by Changesâ€*â€*
DB2831-4911 10183901 1992-93 HD C/K & P - Turbo (200 hp) * — Note 10
DB2831-4927 14098655 1992-93 HD C/K & P - Turbo, 1.2 cSt * — Note 10
DB2831-4970 10154607 1992-93 SD - Turbo (15,000 GVW) * — Note 10
DB2831-4971 10154608 1992-93 SD - Turbo (15,000 GVW), 1.2 cSt * — Note 10
DS4831-5067 10225930 1994-96 LD & HD C/K, G, and P3 Truck & Van * DS4831-5288
Note 12
DS4831-5068 10225929 1994 HD C/K, G, and P3 Truck & Van * — —
DB2831-5079 10224039 1993-97 2½ Ton Cab-over (Military) - Turbo (200 hp) * — Note
10
DB2831-5088 10229115 1994-97 HD P & G Van - N/A (170 hp) * — Note 10
DB2831-5089 10229119 1994-97 HD P & G Van - N/A, ALT. * — Note 10
DB2831-5119 10238967 1994-97 HD P Truck - N/A, 2600 RPM (120 hp) * — Note 10
6.5 Liter Applications

- 5 - P.B. 119R6
GM Injection Pump Application and Supersession Guide
6.5 Liter Applications
Model GM P/N Year Application
Engine
System Superseded by Changesâ€*â€*
DB2831-5129 12550269 1994 HD P & G Van - N/A, 1.2 cSt (170 hp) * — Note 10
DB2831-5149 12550433 1994-96 HMMWV (Military) - N/A, 1.2 cSt (170 hp) * — —
DB2831-5157 12551521 1994 HD O.E.M. - Turbo (200 hp) * — Note 10
DB2831-5164 12552397 1992-93 HD C/K & P - Turbo (Man. Trans.) Service * — Note
10
DB2831-5167 12552621 1992-93 SD - Turbo (15,000 GVW) Service * — Note 10
DB2831-5209 12555697 1995-97 HD (Military) - N/A, 1.2 cSt * — —
DS4831-5288 12558156 1997-98 LD & HD C/K, G, and P3 Truck & Van * DS4831-5459
Note 13
DB2831-5323 12559097 1997 HD 6.5 replacement for 6.2
(3 speed Auto. Trans.)
* — Note 10
DB2831-5436 12561383 1994 HD P& G - (170 hp) * — Note 10
DB2831-5437 12561384 1994 HD P& G - ALT. * — Note 10
DB2831-5438 12561385 1994 HD P - 1.2 cSt, 2600 RPM (120 hp) * — Note 10
DS4831-5459 12561405 1999 LD & HD C/K, G, and P3 Truck & Van * DS4831-5521
Note 14
DB2831-5485 12561514 1998-00 HD (Military) - Turbo, 1.2 cSt (200 hp) * — —
DS4831-5521 12561307 2000 LD & HD C/K, G, and P3 Truck & Van * — —
â€*â€* At the time of supersession parts and/or calibration changed as noted. Other changes may
have occurred since.
Engine Systems
C/K — Injector - 84 mm length, 6 mm dia. nozzle valve; Lines - 2.50 mm I.D.; Delivery Valve
Retraction - 30mm3
G — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.00 mm I.D.; Delivery Valve
Retraction - 22.5mm3
* — Injector - 74 mm length, 5 mm dia. nozzle valve; Lines - 2.36 mm I.D.; Delivery Valve
Retraction - 22.5mm3
Notes
10 — Start of injection (S.O.I.) Sensor, P/N 26605, beginning with 1992 MY (S.B. 469)
11 — (a) High Force HPCA Solenoid; (b) Housing Pressure Regulator/Return Connector; (c)
Calibration
12 — (a) Unpotted Encoder Sensor; (b) Ceramic Rollers
13 — (a) Inner Bearing Retainer/Thrust Washer; (b) Encoder Sensor; (c) T.P. Blade Spring;
(d) Calibration
14 — (a) Stepper Motor and Stop; (b) Pump Mounted Driver

Arctic pumps:
DB2829-4386 23500256 1984-85 CUCV (Military), HD C/K, D Truck - 1.2 cSt C/K
DB2829-4440 23500276 1985 HMMWV (Military) - 1.2 cSt C/K DB2829-4523 Note 2
DB2829-4441 23500277 1985 HD C/K & P Truck - 1.2 cSt C/K DB2829-4512 Note 2
DB2829-4521 23500414 1986-87 CUCV (Military), HD D Truck - 1.2 cSt C/K — —
DB2829-4523 23500415 1986-89 HMMWV (Military) - 1.2 cSt C/K — —
DB2829-4647 23502178 1988 HD C/K, R/V, P Truck & G Van - 1.2 cSt G DB2829-4724
Note 7
DB2829-4655 23502229 1988-89 Industrial - 12V (Clark), 3600 RPM, 1.2 cSt C/K Made
from DB2829-4548
DB2829-4724 23503999 1989 HD C/K, R/V, P Truck & G Van - 1.2 cSt G — —
DB2829-4780 10149619 1990 HD C/K, R/V, P Truck & G Van - 1.2 cSt G — —
DB2829-4804 10149648 1990 Industrial - 12V, 1.2 cSt G Made From DB2829-4801
DB2829-4848 10149634 1990 HMMWV (Military) - 1.2 cSt G DB2829-4879 Note 8 exc.
(e) & (f)
DB2829-4876 10149619 1991 HD C/K, R/V, P Truck & G Van - 1.2 cSt * — —
DB2829-4879 10149634 1990½ HMMWV (Military) - 1.2 cSt G — —
DB2829-4980 10154616 1992 HD C/K, R/V, P & G Van - 1.2 cSt * DB2829-4876 Note
10
DB2831-4927 14098655 1992-93 HD C/K & P - Turbo, 1.2 cSt * — Note 10
DB2831-4971 10154608 1992-93 SD - Turbo (15,000 GVW), 1.2 cSt * — Note 10
DB2831-5129 12550269 1994 HD P & G Van - N/A, 1.2 cSt (170 hp) * — Note 10
DB2831-5209 12555697 1995-97 HD (Military) - N/A, 1.2 cSt * — —
DB2831-5438 12561385 1994 HD P - 1.2 cSt, 2600 RPM (120 hp) * — Note 10
DB2831-5485 12561514 1998-00 HD (Military) - Turbo, 1.2 cSt (200 hp) * — —


Stanadyne lists the following IPs as military without a civilian application: 4355, 4440, 4471,
4520, 4521, 4523, 4524, 4847, 4848, 4878, 4879 for 6.2s and some other 5XXX IPs for
military 6.5s.
DB2829-4355 23500014 1984 HMMWV (Military) C/K DB2829-4471 Note 5
DB2829-4440 23500276 1985 HMMWV (Military) - 1.2 cSt C/K DB2829-4523 Note 2
DB2829-4471 23500398 1985 HMMWV (Military) C/K DB2829-4524 Note 2
DB2829-4520 23500413 1986-87 CUCV (Military), HD D Truck C/K
DB2829-4521 23500414 1986-87 CUCV (Military), HD D Truck - 1.2 cSt C/K
DB2829-4523 23500415 1986-89 HMMWV (Military) - 1.2 cSt C/K
DB2829-4524 23500416 1986-89 HMMWV (Military) C/K
DB2829-4847 10149679 1990 HMMWV (Military) G DB2829-4878 Note 8 exc. (e) & (f)
DB2829-4848 10149634 1990 HMMWV (Military) - 1.2 cSt G DB2829-4879 Note 8 exc.
(e) & (f)
DB2829 - 4875 not listed as military but military suplus shows they were purchased for $1800
each.
DB2829-4878 10149633 1990½ HMMWV (Military) G
DB2829-4879 10149634 1990½ HMMWV (Military) - 1.2 cSt G
DB2829-4879 10149634 1990½ HMMWV (Military)

Jdemaris,

Thanks for posting the list of pump serial numbers and application for each.It was greatly appreciated.

I'd add to pull the pan AND at least the 3 middle main caps-low mileage doesn't mean anything, I had an '85 w/only 116K that was relatively babied (a C1500 Suburban, never pulled anything heavier than a 4K travel trailer) that had a crack at the outer bolt hole web of the #4 main cap-the problem with the cracks-a relative time bomb that can cause catastrophic engine failure with little or no warning, and the harder the engine is worked, the greater the risk of failure.

Originally Posted by meb727

. . . low mileage doesn't mean anything. . .

. . . the harder the engine is worked, the greater the risk of failure.

My statement was a general one - and generally speaking, low mileage certainly does count for something. It's not a guarantee, but IS a good predictor. Your chances are better in finding a good block with low miles as compared to one with high miles. The nice thing with 6.2 rigs built before 1985 is - that many crapped out due to bad 700R4 transmissions and bad injection pumps since they did not have the later EID rings. I've found many that got parked with low miles - and then just sat for many years. They still pop up now and then - cheap - and sometimes free.

I worked on the 5.7s and 6.2s when they came out new. I saw several blow to pieces at 30,000 miles. I also saw several cranks snap right in two with low miles. Some in front, some in the middle, and some at the flywheel. So yeah, it happens. I write it off to poor quality control of the cast-iron blocks and cranks. Those that were made well last much longer then the poor castings - and many do so regardless if used easy or hard.

One example is my 87 3/4 ton 4WD Suburban with a J-code 6.2. It pulled a 5000 lb. trailer cross-country for its first 350,000 miles, and then got used as a vacation camper rig until 520,000 miles. Up to that 520,000 - I'd never had it apart. As routine maintenance, I "refreshed" the injection pump twice with a $15 seal kit and pump blades, put in new injector nozzles twice, and put in three water pumps and two vacuum pump pods. At 520,000 it blew to pieces -crank and block. My only complaint is - it did it with no warning - and ran perfectly just before it blew. In my mind - a well designed engine dies a slow death and gives you lots of warning. The 6.2 often gives none.

I don't even pay scrap value for 6.2s if I know they have over 200K.
I have bought many with under 100K, and if not blown when I bought - none were found to be cracked so far. So, at least for me - I've got a 100% success rate of buying good used engines.

I was asking this question precisely because of the main bearing crack issue... I was aware that early DDC produced blocks had a high nickel content, and were therefore more desirable. Also that there were late model 6.2L/6.5L blocks which had been cast with a higher nickel content as well, so this would allow me to build a more durable engine. An early 6.2L bottom end with a late 6.2L J code top end would be a relatively desirable combination, I should think. I just bought a 2WD 1993 Suburban for my wife with 248,000 miles. It's got a 350 and 4L60E, both of which are pretty worn out. The body is beautiful, and the suspension was just overhauled about 20,000 miles ago. It drove great, except for the stuttering engine and slipping transmission. I intend to install a 6.2L and 700-R4 combination in it.

Originally Posted by argo

Also that there were late model 6.2L/6.5L blocks which had been cast with a higher nickel content as well, so this would allow me to build a more durable engine.

That's something I've never heard nor read. The early 6.5s used the same block as the 6.2 for just a year or two and were pretty thick castings - but where did you hear or read anything about higher nickel? Block cracking in later blocks addressed by GM - by making the main-cap bolt holes smaller and leaving more metal in the block. The original 12 mm main-cap bolts got changed to 10 mm.

The new blocks being cast now by a Navistar company - for military and marine use DO have more nickel content and more metal and the complete engines are marketed as "Optimizer 6500s." Still have the cast-iron cranks though.