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how long does a 6.2l last(miles)

Discussion in 'The Garage' started by DesertDueler, Aug 20, 2004.

  1. DesertDueler

    DesertDueler 1/2 ton status

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    I am going to look at one that has 200K on it, how long do they usually last?

    Dan
     
  2. Poohbair

    Poohbair 1/2 ton status

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    Like any other engine, depends on the maintenece. I have seen several well maintened 6.2's in the 300K range for mileage... and I have seen a few that never saw 100K.
     
  3. DesertDueler

    DesertDueler 1/2 ton status

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    Yea, I was worried that 200k was it for the 6.2s, but you are making me feel better. I got 201K miles out of the original 350 in my 87, so hopefully if I get this, 300K is possible.

    Dan
     
  4. Poohbair

    Poohbair 1/2 ton status

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    One of the big things that I learned about 6.2's (and I think 6.5's) is that they also use a "stretch to fit" head bolt. So if you ever take the heads off, get new bolts. They are a one time use only application and this caused alot of problems w/ people replacing head gaskets and then reusing the head bolts, to only have more head gasket problems because the bolts would not stay torqued. This is what I heard from a friend who works at a diesel performance shop...
     
  5. DesertDueler

    DesertDueler 1/2 ton status

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    Thanks for the info

    Dan
     
  6. Drey

    Drey 3/4 ton status

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    The one in my GMC has 250 or 350 thousand im not sure because the tach doesnt say. Either way it is knocking like a son of a bitch, im just gonna run it till it blows up. The 6.2 i have in my Scottsdale(old C10 with blown 700R4) has 174000 that truck runs like its brand new with the exception of the blown tranny. Like they said above it all depends how they are treated.
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Mine has 223,000 on it. Runs beautiful, 35 psi oil pressure at idle (65-70 psi on the freeway) and no noises it shouldn't have.

    Have a good look at the harmonic balancer on any you look at. If the rubber is starting to squeeze out it's time it got replaced...that's a big cause of broken cranks. Mine is gonna get replaced very soon (I should have done it months ago.../forums/images/graemlins/blush.gif)

    Religious oil changes help a lot too.

    Other than that it shouldn't be a big deal to get 300K out of a 6.2 IMO.

    rene
     
  8. DesertDueler

    DesertDueler 1/2 ton status

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    Well the one I looked at was turboed, and it didnt sound happy. It have injector noise, and some other noise, like maybe a bottom end. It also was blowing smoke out of the breather at idle(rings?). I passed on it.

    Dan
     

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