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Bigdog's avatar
Bigdog
Explorer
May 28, 2016

Used 3126b engine

Does anyone know of a good running 3126b 8yl rv diesel in the Pacific northwest area? The one in my rv has a dusted cylinder and so I need to replace it. CAT wants about $32-34k to replace it with what they called a running engine which sounds like a long block as they will use the external accesories from mine.
I was thinking of just selling it as is, but I can't morally do that, unlike the dealer I bought it from and the previous owner. If I sell it as is and disclose thre problem, then I'll go upside down.

19 Replies

  • Correct-- the Cat 3126 (an in-line 6 cylinder BTW) can be sleeved.

    Saw an independent company doing it at Mustang Caterpillar in Houston.

    But, if more than one cylinder bad, may not be cost effective.

    And the total price you were quoted is WAY, WAY high.
  • Yes 11178adn is correct. They do have kits to where those 3126 engines can be sleeved.
  • yes 3126/c7 blocks can be sleeved they bore the block and install a dry sleeve, a lot of labor involved. check with a freightliner dealer, they have a line of reman engines, I think it is there Alliance brand, that is usually cheaper than genuine CAT.
  • Hey Jon, how in the heck are you it's been awhile! Call Craig Stensgaard at Food Services of America, Kent, WA. 1-800 562-5317 he just might have one laying around! Tell Craig that Rooster said to call you. Craig and I were at the Bowling Alley where I meet you for coffee about 3 weeks ago. Craig is in charge of both FSA Shops Kent and Everett and some of his delivery trucks do have 3126 engines. Take Care, Rooster
  • Let google be your friend. There seems to be a lot of them on E-BAY. A lot of school buses used that engine.
    http://rvchassisparts.visonerv.com/cgi-bin/f/caterpillardieselmotors.pl?
  • You can't re-sleave this engine. Believe me if you could I would have had it done aiready.
  • First off sorry to hear of your trouble.That is a big labor job whichever way you go with it.I don't think that engine can be sleeved. It is a non sleeve engine.

    I would look at the truck wreckers in the state and see what they may have. they were a popular engine in the medium duty trucks.

    There is the rv wrecker that I have seen online vision Rv or something like that. Try to google it. They sell complete used engines from RV's with probably lower mileage.
  • What is wrong with re sleaving the cylinder. I'm not a diesel expert but heard that can be done.