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Thread: 6.5L Turbo Diesel Blazer Project

  1. #21
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    Ft. Wayne, In.
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    535

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    Sorry for the late response to your pictures of the 2 doors (at Rendezvous).
    Looks like my butt in 2 of the photos! John and I were adjusting the timing.
    Good Times!
    Dave, N9LOV
    Member #242
    Dave's Diesels:
    Sold June, 07 '82 1/2 ton 4X4;340k miles
    '97 2 Dr Tahoe, Intercooled,
    Kennedy ECM, 4" Exhaust
    '02 GMC

  2. #22
    Join Date
    Feb 2000
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    Montana
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    Red face Heads are back!



    Got the heads back from the engine shop this morning. One of the heads needed a new exhaust valve. Valve job, bead blasted, crack checked, vacuum tested and pressure tested. Total out the door cost was $368. The deck surfaces didn't need to be machined, but I will use my flat steel block to dress them like I did the Duramax heads/blocks.

    Another engine shop quoted me a price gouging $1200 in 2017 to do the same work on these heads - this was on top of the $350 I had already paid for the used set of heads. Needless to say, they didn't get the work. So, another big snag has been resolved, and the project moves forward. Jim

  3. #23
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    Newberg Oregon
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    Sweeeeeeeeeeeeeeet
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  4. #24
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    Montana
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    Post The Good, the Bad and the Ugly...

    First, the bad and the ugly...



    The above is what put/kept the Blazer in the shop for the past decade... The result of towing heavy, pushing hard... and not paying attention... This Blazer has a boost/EGT gauge on the A-Pillar that I installed back about 2000 when I owned it the first time, but it wasn't enough to keep it safe... apparently. The Blazer was running a performance chip and a Turbomaster.



    This is what the engine looks like as of right now... Tuesday morning, September 14th. New buttons! Got the heads and valve trains parts all installed yesterday afternoon with daughter's help. Such a trooper, that girl. The Good!
    Last edited by More Power; 09-22-2021 at 09:35.

  5. #25
    Join Date
    Apr 2001
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    Newberg Oregon
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    Indeed.
    Having a young lady that loves or even wants to be involved in this type of stuff is a rarity...

    I have seen pistons that look like that one in the piccy before.
    I opened up a 6.2 from a mid/late 80's 1 ton GMC

    The guy was hauling a fairly large rubber tired back hoe around and pulling a lot of heavy grades.

    He would mash the skinny pedal and let the little engine that could do it's thing....never back off, no slack, just flog the ponies until it laid down and died.....It had 3 pistons that looked like that one, all the main webs were cracked and the heads were nearly melted (Figurative)
    Nothing was salvageable.....DOOR STOP....
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  6. #26
    Join Date
    Feb 2000
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    Montana
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    11,382

    Unhappy When cleaning the garage isn't a good idea...

    Have a request.... Back this spring during the time I cleaned out the garage in preparation for the summer projects we've been discussing here I disposed of a number of parts that I thought had been removed from Lil Red (the gas engine parts, transfer case, driveshafts, etc). I tossed the front driveshaft... Turns out it was the Blazer's... It had a 1330 front u-joint and a flange at the rear, with a slip joint near the front. The whole affair was about 3' long or thereabouts. Anyone have one laying around or know where one might be? Thx

  7. #27
    Join Date
    Apr 2004
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    Bar Nunn, WY
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    193

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    I believe the front drive shafts for the Tahoe/Yukon/Blazer/Suburban/K1500 PU were all the same part. If you look a Rock Auto the same part fits most every SUV/PU from that era. If true it would be easy to find one in a junk yard.

    Jay
    2023 Tahoe 3.0l diesel
    2013 Harley Switchback
    2021 Ram 2500 6.7l (sold)
    2018 Chevy Traverse (sold)
    2021 Silverado 3.0l LM2 (sold)
    2019 GMC Sierra 6.2l (sold)
    2019 Colorado ZR2(sold)
    2017 2500HD CC D/A (sold)
    2015 1500 CC High Country 6.2l (sold)
    2010 Chev 2500HD CC D/A (sold)
    2013 Chev 2500HD CC D/A (sold)
    2006 Chev 3500 CC D/A (sold)
    2005 Harley Ultra Classic (sold)

  8. #28
    Join Date
    Oct 2001
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    Granby, Missouri, USA
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    Quote Originally Posted by cabletech View Post
    I believe the front drive shafts for the Tahoe/Yukon/Blazer/Suburban/K1500 PU were all the same part. If you look a Rock Auto the same part fits most every SUV/PU from that era. If true it would be easy to find one in a junk yard.

    Jay
    FYI - my 1995 2 door Tahoe front driveshaft has a u-joint on both ends; sounds like Jim's has a u-joint on one end and a flange on the other, so they are not the same. Might depend on which transfer case was used as well, since some models were equipped with electric shift options?

    On edit - I looked it up, and it appears 1994 and older models use the u-joint/flange shaft that Jim describes, while 1995 and newer models use the double-ended u-joint version.

    Casey
    1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter

  9. #29
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    I have one from a 1995 1500. If you can use it, it's yours. I don't know what it would cost to ship it, but it's not so big or heavy to require freight.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  10. #30
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    Quote Originally Posted by arveetek View Post
    FYI - my 1995 2 door Tahoe front driveshaft has a u-joint on both ends; sounds like Jim's has a u-joint on one end and a flange on the other, so they are not the same. Might depend on which transfer case was used as well, since some models were equipped with electric shift options?

    On edit - I looked it up, and it appears 1994 and older models use the u-joint/flange shaft that Jim describes, while 1995 and newer models use the double-ended u-joint version.

    Casey
    I'll confirm that in the morning. Too dark and scary out there right now.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  11. #31
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    Should be able to put that shaft in a cardboard tube and it will travel quite well.....
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  12. #32
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    New Hampshire - Live Free or Die
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    Quote Originally Posted by DmaxMaverick View Post
    Too dark and scary out there right now.
    Yeah, what you guys need is a different governor...
    The Constitution needs to be re-read, not re-written!

    If you can't handle Dr. Seuss, how will you handle real life?

    Current oil burners: MB GLK250 BlueTEC, John Deere X758
    New ride: MB GLS450 - most stately
    Gone but not forgotten: '87 F350 7.3, '93 C2500 6.5, '95 K2500 6.5, '06 K2500HD 6.6, '90 MB 350SDL, Kubota 7510

  13. #33
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    Quote Originally Posted by JohnC View Post
    Yeah, what you guys need is a different governor...
    Tried. Didn't work. What YOU guys need is for CA to have a different governor. This disease of a state is infectious.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  14. #34
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    The front shaft I have is joints at both ends. No flange.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  15. #35
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    Knoxville,Tennessee
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    Quote Originally Posted by DmaxMaverick View Post
    Tried. Didn't work. What YOU guys need is for CA to have a different governor. This disease of a state is infectious.
    I saw Kamela strutting around on the news with Gavin yesterday, she probably had a hand in counting the votes
    "The Constitution is not an instrument for the government to restrain the people, it is an instrument for the people to restrain the government."
    -Patrick Henry


    A5150nut
    2006 K3500 D/A
    94 6.5 4x4 5spd Sold

  16. #36
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    Quote Originally Posted by a5150nut View Post
    I saw Kamela strutting around on the news with Gavin yesterday, she probably had a hand in counting the votes
    No doubt she had a good laugh over it.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  17. #37
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    I have a flange.....
    Easy to assemble

    Should be a Saginaw 3R joint (Internal snap ring type)
    This came off a 1994 2500 Burb....should be the same shaft...

    If this will help....it's yours...Just PM me an address and I will get it on the stage for ya.....
    Attached Images Attached Images
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  18. #38
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    Quote Originally Posted by Robyn View Post
    I have a flange.....
    Easy to assemble

    Should be a Saginaw 3R joint (Internal snap ring type)
    This came off a 1994 2500 Burb....should be the same shaft...

    If this will help....it's yours...Just PM me an address and I will get it on the stage for ya.....
    Looking up U-joint part numbers....
    For the 95, all the joints are the same. Front, rear, either end, all the same. Not so much for a 94 Suburban. There are a lot of options, to include, steel or aluminum shaft, and different diameter bearing cups. The shaft I have is 1.125" at both ends. It's an original AAM, complete with union sticker.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  19. #39
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    I'll take pic or two, measure the length, then post what I discover later this afternoon. I did crawl under it on Monday to see if it had a flange once I felt that sinking feeling about what I tossed...

    You guys are the best!

    PS ... sorry about the vote count...

  20. #40
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    Smile



    The above image shows the existing U-joint yoke on the front differential. Measurements are pretty close, but not exact.



    The above image shows the existing driveshaft flange on the transfer case.

    There is ~33-1/4" from the mounting surface of the flange to the bottom of the U-joint semicircle on the front diff U-joint yoke (= driveshaft length).

    Thanks everyone!

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