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6.2L Diesel Engine Discuss the 6.2 GM diesel engine & associated components.

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Old 11-15-2011, 10:54 PM   #21 (permalink)
happypunch
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the plan is to keep the black engine (originally from an 85) and build it up in my spare time. that way when my current engine with 237000 miles decides to break, i will have a good built engine ready to go!

by the way jdemaris, when my brother was under the truck i had him read off all the numbers he could find on the tranny and he said 15 and md8 were the only things he could see. im assuming those are not the right numbers you wanted. where do i look for the correct #'s? and this tranny was originally behind a 350 if that matters.

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Old 11-16-2011, 07:37 AM   #22 (permalink)
jdemaris
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Quote:
Originally Posted by happypunch View Post
my brother was under the truck i had him read off all the numbers he could find on the tranny and he said 15 and md8 were the only things he could see. im assuming those are not the right numbers you wanted. where do i look for the correct #'s? and this tranny was originally behind a 350 if that matters.
No, you're looking in the wrong place. All 700R4s have a long code numbe stamped into the case in the rear - just about the tin oil pan. The number tells you the month and year the trans was built along with the version code. The big cast-in MD-8 is just the RPO code and tells you nothing specific.

Te ID tag is found on the passenger's side of the transmission housing, towards the rear, just above the oil pan. A sample code reads "8YDM021H," with the first digit representing the year. The first year, 1982, is identified by "9," with all following years identified by the last digit of the year. The final year of THM700-R4 production was 1993, which is identified by "3." All GM transmissions from 1982 to 1993 with the same pan shape and 16-bolt count are THM700-R4s, anything later becomes a 4L60-E transmission. Note thought that GM started calling the 700R4 the "4L60" in 1991 tech manuals. Gets confusing.

Torque converter also has ID codes as follows:
700R4 or 4L60 conveters
First digit: C = Early 700R4 w/27 spline # B15 series, D= '85-up 700R4 30 spline # B29 series, H=10 1/8" # B24 series B24's use different codes
Second digit: Gives stall range: G,H,K = 1200-1400 stall, E,F,L = 1611-1654 stall, B,C = 2000 stall
Third digit: Type of clutch: 1982-1995 most all codes interchanged, 1996 up A,G,H,L CARBON Filled Clutch, N & P Woven Graphite Clutch
Forth digit: cover type, C,D,F & G codes interchange, E code is a 6 Lug Diesel



Attached Images
File Type: jpg 700case2.jpg (21.9 KB, 184 views)
File Type: jpg TH700-R4_1.jpg (37.2 KB, 302 views)
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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
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Old 11-16-2011, 08:43 AM   #23 (permalink)
jdemaris
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Originally Posted by happypunch View Post

by the way jdemaris, when my brother was under the truck i had him read off all the numbers he could find on the tranny and he said 15 and md8 were the only things he could see.
Here are what some code numbers look like.

The 4L60 trans I pulled from the 1991 diesel Suburban. Stamped 1LFM157A
That means it was made the 157th day of 1991. Type LM for diesel.


The 1991 diesel torque converter is: 8653382 DG5F. D is 1985 or newer 700R4, G is 1397 RPM, 5 is ??, and F is three square lug or diesel late style.


My 1986 diesel Blazer 700R4 trans is marked: 6TRM171A
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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
1992 Dodge D200 4WD Cummins turbo-diesel, intercooled with 5 spd Gertrag
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Old 11-16-2011, 09:17 AM   #24 (permalink)
Diaric
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Quote:
Originally Posted by jdemaris View Post

The 1991 diesel torque converter is: 8653382 DG5F. D is 1985 or newer 700R4, G is 1397 RPM, 5 is ?? , and F is three square lug or diesel late style.


My 1986 diesel Blazer 700R4 trans is marked: 6TRM171A
The 5 should refer to the type of clutch assembly in the lock up, but I have no reference for a "5" either
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well to make your pump retarded, you could let it hang out with me for a day
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Diaric wins thread derailment......
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Yeah Diaric, I gotta say, I'm afraid I'm going to have to give you an official warning on that.
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Old 11-16-2011, 12:59 PM   #25 (permalink)
smackzed
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just out of curiosity, if "9" is for an '82 what # does an '89 have?
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Old 11-16-2011, 02:12 PM   #26 (permalink)
jdemaris
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just out of curiosity, if "9" is for an '82 what # does an '89 have?
The 1989 case has big casting marks that the 1982 case does not. 82 also have the small input shaft. A few codes are the same for both years, but then you can tell with other obvious differences. Here are the codes . . .

1982 transmissions all start with . . . 9MB, 9MC, 9MD, 9ME, 9MH, 9M2, 9M4, 9M5, 9M6, 9M7, 9TC, 9TE, 9TH, 9TJ, 9TK, 9TN, 9TP, 9TW, 9T5, 9T6, 9YA, 9YK, 9YL, 9Y3, 9Y4, 9Y6

1989 transmissions all start with . . .9F, 9MAM, 9MCM, 9MDM, 9MFM, 9MHM, 9MKM, 9MLM, 9MPM, 9MRM, 9MWM, 9MXM, 9MZM, 9PAM, 9PBM, 9PCM, 9RM, 9THM, 9TJM, 9TK, 9TLM, 9TNM, 9TUM, 9TXM, 9YDM, 97DM, 9YNM, 9YPM, 9YTM, 97XM, 9YZM

And just in case anyone cares . . a 1982 trans with a diesel is 9MH or 9TN for a C truck, 9M6 or 9TP for a K truck

1989 trans for a diesel is . . 9MHM for an R truck, 9PAM or 9PBM for a C truck, 9PCM for a K truck, and a 9TNM for certain R trucks and G vans
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1982 K10 PU 6.2 diesel,1983 (two) Blazers 6.2 diesel, TH400, 1983 K5 Blazer with 6.2 diesel, 4sp man. OD trans. and Chalet pop-up camper body.
1986 K5 Blazer 6.2 diesel, 700R4 trans.- with Halmark pop-up camper body.
1987 V20 4WD Suburban 6.2 diesel, 1988 K5 Blazer 6.2 diesel, 700R4. 1989 GMC 3/4 ton, 4WD Suburban, 6.2 diesel, TH400 trans.
1991 Suburban 4WD 6.2 diesel 700R4 trans.
1981 (two of them) Chevy Chevette with 1.8 diesel and 5 sp. trans.
1985 Isuzu P'UP 4WD pickup with 2.2 diesel
1991 (Two of them) Volkswagen Jetta 1.6 diesel
1985 Ford F250 4WD ex-cab, longbed, 6.9 diesel
1994 Ford F250 4WD ex-cab, longbed, 7.3 IDI turbodiesel.
1983 Mercedes 300D five-cylinder turbo-diesel
1992 Dodge D200 4WD Cummins turbo-diesel, intercooled with 5 spd Gertrag
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Old 11-20-2011, 02:23 PM   #27 (permalink)
happypunch
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finally got the exhaust manifolds on. those are a huge pain with the engine still in the truck! found that i cant use the 6.5 exhaust manifold on the driver's side without major modifications to the oil lines. much easier to use the 6.2 manifold there and shorten the crossover pipe by about 1.5". has anyone else run into this problem? my spare engine is a little different with the horizontal oil filter, maybe that would have worked differently???

started on what i expect will be the hardest part, which is modifying the a/c box with the evaporator and blower fan/motor. as a lot of you may already be aware, a 6.5 turbo will not fit if you have a/c. the evaporator points towards the engine and there just isnt enough room. I have yet to find a right up on how to make the a/c box from a 80's s10 work, so as i go i will try to take pictures and detail what i do (good and bad) so if i fail completely at least it will be a list of what NOT to do!

the s10 setup wont just swap in, of course that would be too easy. the whole assembly is smaller than that of the suburban, so all the holes in the firewall wouldnt come close to being covered and the slot for the heater core is completely different. so what im attempting is to take both a/c boxes (and when i say a/c box i mean the whole thing from blower to evaporator) cut them up and Frankenstein them back together using my amateur fiberglass skills to fill any gaps.

once that is done, i hope it will be all down hill from there. still have to add the electric fuel pump, extend transmission lines, hook up the oil supply to the turbo and get the exhaust built. then it will be able to be started!!! hook up the gauges and see how she does!
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Old 11-27-2011, 03:14 PM   #28 (permalink)
happypunch
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got the a/c box finished. of course it was dark by the time i got it installed, but here are some pictures ofthe work involved. it was actually a lot easier than i expected. we used a very precise saws-all for the cuts... so it was really rough. and cut the evaporator box from the blower and just kept trimming to fit. put it up against the firewall to check size and fit.

first cut:



after more trimming, this is the evap box from the s10:

you can see the s10 ac evaporator points towards the fender where the original pointed towards the engine. also it is about an inch shorter.

test fit. still needed a little trimming, but getting close!

this is how it looked after all the trimming was done. looks pretty good from this angle, but will need fiberglass to patch all the holes.

this shows all the work that still needs done with the fiberglass. it was kind of a pain to glass, especially since it was my first attempt. but will show the final result pictures in a couple days.
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Old 11-27-2011, 03:22 PM   #29 (permalink)
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Nice work, any chance you would make another, might need one myself
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Old 11-27-2011, 03:27 PM   #30 (permalink)
happypunch
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Nice work, any chance you would make another, might need one myself
wait til you see the final product before you go offering me a job!!!

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