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Old 11-22-2009, 02:33 PM   #11 (permalink)
IamDave0887
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the only other red block i've seen with my eyes was painted the same red color and it's in an 82 K-5 blazer.

I think that's how it got it's nickname "the red block" because it was the only one ever painted red like that from the factory.

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Old 11-22-2009, 04:56 PM   #12 (permalink)
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i got a 82 burben that has the red engine im told it was the orgional

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Old 11-22-2009, 05:02 PM   #13 (permalink)
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Quote:
Originally Posted by detroitdiesel View Post
Where exactly is this date code letter? Is it in the intake valley?? I looked on the drivers side of the intake valley where the IP would be, but don't see any letter.
Also, the heads do have the "14028901" casting number.
Yes, that's the code for the 1982 head. I doubt anybody would ever swap those heads onto an engine, but I guesss anything is possible. Seeing how they have the only-year odd-ball threads, and also water-port problems, I don't see why somebody would use them if they had a choice.

GM had a repair kit for those heads because they caused head gaskets to leak. There's an extra water port in each head that needs to be blocked off.
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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 11-22-2009, 05:08 PM   #14 (permalink)
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Quote:
Originally Posted by jdemaris View Post
Yes, that's the code for the 1982 head. I doubt anybody would ever swap those heads onto an engine, but I guesss anything is possible. Seeing how they have the only-year odd-ball threads, and also water-port problems, I don't see why somebody would use them if they had a choice.

GM had a repair kit for those heads because they caused head gaskets to leak. There's an extra water port in each head that needs to be blocked off.

Ok, but is that the right "T" code on the picture i posted the one you were talking about?
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Old 11-22-2009, 05:29 PM   #15 (permalink)
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Originally Posted by detroitdiesel View Post
Ok, but is that the right "T" code on the picture i posted the one you were talking about?
No . . the year date code gets stamped onto the runner of the intake manifold, near the driver's side valve cover. T for 1982, U for 1983, F for 1984, D for 1985, H for 1986, etc.

Some blocks have an extra code stamped right onto the block that goes like this: First letter is the month made . . . A is January, B is February, C is March, etc.
Next two numbers tell the day of the month it was produced. Then the last number is the year. So, if you had a B228, it would be "February 22, 1988."
I'm not sure what year GM started doing that. I've got three 1982 6.2 diesels laying under my work bench. I'll take a look later. Also got a fourth one sitting in my 1982 K10 truck.
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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 11-22-2009, 07:16 PM   #16 (permalink)
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Quote:
Originally Posted by jdemaris View Post
No . . the year date code gets stamped onto the runner of the intake manifold, near the driver's side valve cover. T for 1982, U for 1983, F for 1984, D for 1985, H for 1986, etc.

Some blocks have an extra code stamped right onto the block that goes like this: First letter is the month made . . . A is January, B is February, C is March, etc.
Next two numbers tell the day of the month it was produced. Then the last number is the year. So, if you had a B228, it would be "February 22, 1988."
I'm not sure what year GM started doing that. I've got three 1982 6.2 diesels laying under my work bench. I'll take a look later. Also got a fourth one sitting in my 1982 K10 truck.

These are the only numbers/letters i can find on the driver side of the intake. There is no one letter
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Old 11-22-2009, 09:01 PM   #17 (permalink)
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How about someone tell us what they remember about the red to black color change ??Not disagreeing ,just want to know! How about the engines with EGR & small valves My new 1982 was a 10 Series with EGR. Small valves.No head or gasket problems ever. Installed an ATS turbo early on. 25 MPG hiway cruising. 19 local in local daily driving trips. Installed a fan clutch & fan blade from a 1ton. Heat gauge was very stable from then on towing.
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Old 11-23-2009, 09:33 AM   #18 (permalink)
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Originally Posted by 4doorTAHOE6.5TD View Post
How about someone tell us what they remember about the red to black color change ??Not disagreeing ,just want to know! How about the engines with EGR & small valves My new 1982 was a 10 Series with EGR. Small valves.No head or gasket problems ever. Installed an ATS turbo early on. 25 MPG hiway cruising. 19 local in local daily driving trips. Installed a fan clutch & fan blade from a 1ton. Heat gauge was very stable from then on towing.
I've seen several black engines in 1982s, and that's when they were brand new. I have no idea if the actual color means anything, except that most model year 82s had red engines. Some model year 1982 trucks were built in 1981 and some were built in 1982. And, I'm sure date of engine production varies a lot also.

As to the extra head passage and factory recall and update on 6.2s? Like any problem, it gets addressed when many failures occur. It does not mean that every single 6.2 out there had to develop the problem. And, some 1982s built late had the problem fixed before it left the showroom floor.
GM had a recall, going by VIN number. All it entailer was a small $1 plug driven into each head to block an extra water passage.

I also assume the vehicles in cold climates developed more problems then those in warm climates. That certainly was the case with the 5.7 diesels in the late 70s. I was working on them when they were new here in New York.

Also, you say your engine had small valves? How small? 1982 model year engines only had two heads. One with 46 mm intakes and 42 mm exhausts, and the other with 50 mm intakes and 42 mm exhaust. By 1984, 6.2s came with 46 mm intakes and 38 or 39 mm exhausts.

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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 11-23-2009, 08:52 PM   #19 (permalink)
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its an 82 block built in 81... a red block.. good snag
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Old 11-23-2009, 09:32 PM   #20 (permalink)
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its an 82 block built in 81... a red block.. good snag
Sweet, i was torn on whether i should rebuild that block or my other one, but now i know which one i am building up. Think i need one or two new pistons though.

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-1997 GMC Yukon 2 door 6.5L diesel, under construction
-1999 VW MK4 TDI 2-door with lots of fuel.
-2004.5 lly D-MAX. 5" exhause, full EGR delete, hypertech programmer for now.

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