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6.2 NA Detroit in my 72

B

Beetle

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Fredericksburg, VA
Anyone have any info? If not you will here shortly. I just took delivery of an 82 K10 (yea a half ton) with a 6.2/700R4 combo and I do not know the tcase. It has a 10 bolt out back that will go in the K5 since the front axle is going too. From my reading since I have a donor truck I can swap pretty much the entire front end over from the 82 to the 72 and plumb it and wire it. There is where I am stuck: wiring. What really is involved with wiring to make my stock cluster work in the 72? I would love to keep my tach more than anything. Hook me up guys! What y'all got? :bow:

The truck getting the coal burner:
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The coal burner:
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WISH ME LUCK :pimp:
 
Is this post supposed to be in the classified section?

I think you'll find lots more info if you move over to one of the technical forums (1st gen forum or the driveway would be my choice, assuming you're not selling anything).

I'm not familiar with the '72 wiring, but I do like 6.2 engines. An '82 6.2 (red block engine) does not normally have a speed sensor for use with a tach (and no distributor, obviously). Later GM diesels use a speed sensor placed inside the alternator.

Looks like an awesome swap! Wiring-wise, the 6.2 is one of GM's simpler engines (12V to the pump and it runs). Seems like a shame to tear up a nice-looking '82, but I can't wait to see how the project turns out. :popcorn:

Good luck with the swap, and welcome to CK5! As I was told when I joined, "Your truck and your wallet will never be the same!" :haha:
 
Send a pm to a moderator, such as Greg72, they should be able to help you get the thread moved.

Seems like people use terminal/lead on the back of some diesel alternators and something like this http://www.summitracing.com/parts/dak-dsl-1 to connect to regular tachs. And seeing that the stock 72 blazer tachs seem to work with HEI distributors, then the dakota digital box should be able to play nice with the 72 tach.

I am sure someone will chime in with personal experience once the thread is moved.

-Jacob
 
ekajkrats said:
Seems like people use terminal/lead on the back of some diesel alternators and something like this http://www.summitracing.com/parts/dak-dsl-1 to connect to regular tachs. And seeing that the stock 72 blazer tachs seem to work with HEI distributors, then the dakota digital box should be able to play nice with the 72 tach.

I am sure someone will chime in with personal experience once the thread is moved.

-Jacob
Click to expand...

Yeah...adding a tach to a 6.2 (or three) has been on my list for a while...but I haven't personally done it yet. The M1009 may present its own set of challenges. :rolleyes:
 
Are you going to put the 72's engine back in the 82 truck too?-(assuming it has one!).....seems a shame to part the '82 out,it appears to be in decent condition..(unlike mine!)..

The tach may prove a challenge to get working,but there are ways--other than that,the 6.2 has no special wiring ,just the usual stuff the gas engine would have had,like the oil pressure switch,temp gauge sender,it will need a fast idle solenoid power wire,injector pump fuel shutoff wire ,and one for the cold advance switch,you can use the original carbs idle stop solenoid wire for those probably,the altenator is the same as a gas engine (if the 72 has an integral regulator,if not its easy to make one work),it wont take much to get the diesel wired up..
 
I think what you're doing is a lot of work and you should sell both to me and move on to something else!:D

Anyway, the 72 doesn't use vacuum for the climate control and either does the 700r. I believe you can use a tach drive in place of your vac pump. My 91' 6.2 came with one and I might still have it. I'll see if I can take some pics of it and post.

If you have the engine wiring harness that should be the only thing you'll need. I don't believe it will plug into your current fuse box on the cowl side but you should be able to splice it in easy enough. I often remove the sealant on the plug and pull out each spade connector and slide the other in so there is no cutting, soldering etc. Not sure if the yrs of the connectors of both will work with each other. You will have to add of course a fuel filter and a return line for the 6.2 which can be put into the fuel tank filler neck rather than mess with the fuel tank.

Using the 6.2 wiring diagram you should be able to wire in a glow light inside the cab to know when it cycles. Use the newer glow controller (85' and up) and do the resistor mod to it and you'll won't have a need for a manual push button. Mine starts so fast once the light goes out, even in this cold, that I had installed the manual push button and relay yet have if all taped under the dash and the feed from the battery disconnected because there is no need for it. Remember, when the motor is out, pull all 8 GPs and replace with new ones that don't swell. I used the Kennedy Quick Heats and I'm extremely pleased with them.

Now, not sure how the 700r is going to mate up with the transfer case unless your 72 is currently a auto. Still don't know if they'll mate but if they do, you'll probably have a length issue for the drive shaft. You'll have to have other guys who've actually done the trans swap to pipe in here as I haven't.

Good luck as these projects are fun. Mine is almost done and I'll be posting pictures in my thread soon.
 
82355 said:
That engine is NOT a Detroit.

Martin
Click to expand...

I know you cant believe everything you read online,but Wikepedia and a few other sources say a 6.2 , IS a Detroit Diesel engine..(one they "built",but GM cheapened up from its original specs,according to one site)...other sources say its only because GM owned Detroit Diesel at one time,that the 6.2 is considered a "Detroit"...all I know is they are marginally better than the Olds 350 diesels they replaced...not looking to argue about its origin,just posting what I've read about the 6.2..
 
I worked for Detroit, neither a 6.2 or a 6.5 is a Detroit Diesel. Why do you think they painted them red?

Martin
 
:dunno:..GM bought a lot of surplus red paint cheap at auction?..:dunno:...:rolleyes:

I dont think they painted them red after 1982 too??..most of the ones I see in boneyards are painted GM blue or black...both of mine are (or were!) black..
 
Other than identifying a 1982 engine, is there significance to sporting red paint? Does being red indicate non-Detroit-ness? :confused:

FWIW, my '83 and '86 engines are both just darkly colored in general. :rolleyes: I think they're black underneath the grime. Can't be completely certain about their original colors, but the red shines through the grime on the Suburban's engine.
 
Look at an 8.2 in a medium duty truck. They are the god awful Detout blue/green, and they are badged Detroit Diesel. You can buy parts for one at a Detroit Diesel Distributor. There is NO parts availability for a 6.2 or a 6.5.

Martin
 
I could swear the 6.2 in the 82 I parted out was black. Wish I'd've kept that one.

Can't say I ever remember seeing a 6.2 that wasn't black.
 
82355 said:
Look at an 8.2 in a medium duty truck. They are the god awful Detout blue/green, and they are badged Detroit Diesel. You can buy parts for one at a Detroit Diesel Distributor. There is NO parts availability for a 6.2 or a 6.5.

Martin
Click to expand...

I've seen a few at a local salvage yard,lying on the ground (8.2's)...they look like a huge ingot,must weigh 1200 lbs easy...they have "DETROIT DIESEL" casted into the valve covers..and yeah,that teal green/blue color mettalic paint..

I dont know about no parts availability for the 6.2--maybe not from GM much any more,but aftermarket you can buy pretty much anything for one...and there are still a lot of the take outs from the military trucks ,though a lot have been sold as scrap at auctions by now probably....

I think by the time a 6.2 finally expires,or grenades at low mileage,most owners opt not to replace them with another one,they either scrap the truck,or go with a gas engine instead..I know I'm tempted too...
 
"I think by the time a 6.2 finally expires,or grenades at low mileage,most owners opt not to replace them with another one,they either scrap the truck,or go with a gas engine instead..I know I'm tempted too..."

I noticed the last couple comments you made, the above one and the one about the 6.2 being marginally better than the Olds 350 gas conversions.

The 3- 6.2's I've had have all gone at least 100k with two close to 200. The one with 100k I still have because the truck rotted away around it but it runs wonderfully so it's in my garage as a spare. On the Olds issue. My uncle had one and that motor was definitely a bad motor and the 6.2 is leaps and bounds above it. Curious why your statements are basically saying the 6.2 is junk. They are as good as any gas motor I've had.__________________
 
I'm wondering the same thing. I've had folks (erroneously) insist that my engine IS a 350 Olds, but I've not heard anyone familiar with the engines saying they are of comparable quality. The 350 Olds has, in my opinion, achieved a legendary status in the crummy engine department. So far, I have never heard a good 350 Olds diesel story.

But, so far, I don't think I've met a 6.2/6.5 owner who was dissatisfied with his engine unless he

a) didn't like the power output (mostly 6.2)
b) ran without a functional harmonic balancer and broke a crank (either engine)
c) overheated the heads towing too large a trailer (mostly a 6.5TD issue)
d) just didn't like diesels in general
or some combination.

Is there some other concern with this engine that I should be aware of?
 
diesel4me said:
I dont know about no parts availability for the 6.2--maybe not from GM much any more,but aftermarket you can buy pretty much anything for one...and there are still a lot of the take outs from the military trucks ,though a lot have been sold as scrap at auctions by now probably.
Click to expand...

I'm not talking about parts availability from GM. You can still get 6.2 parts from a GM dealer. I am talking about a Detroit Diesel Distributor. Nothing to do with GM. They will not sell you 6.2 parts, because it's not their engine. They don't have any parts for it. They will sell you parts for an 8.2 (Fuel Pincher). It is a Detroit engine. When I worked for Detroit, they were still selling parts for 6-71's.(Detroit sold off their two stroke line since, but many can still get you parts for them).

Just because Detroit made the engines, that doesn't make them a Detroit engine. John Deere cast the early Series 60 blocks and timing cover haves. They have JDFW (John Deere Foundry Works) cast right into them. Just like a John Deere engine (although John Deere pretty much ripped Detroit Series 60's off in their newer engines....). That does not make a Series 60 a John Deere engine. John Deere also cast some GM blocks.

Martin
 
True story. The 6.2 is not a Detroit Diesel engine. No matter how bad some guys believe that it is.

Yes GM owned Detroit diesel at the time at engine was created. And GM poached the idea of that engine from the DD branch.
 
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