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Deere 4045 Engine Exhaust Slip Fit Leaking

Discussion in 'General Industry Questions' started by Birken Vogt, Nov 4, 2021.

  1. Birken Vogt

    Birken Vogt Charter Member

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    Got this 4045HF270 in the shop with an adapter off the turbo outlet that fits inside the female part of this upturned elbow. It leaks a lot of exhaust out the joint. I think there might be some kind of a piston ring type deal in here. I am wondering what parts go bad on these and how to likely repair. I can't take it apart just yet because we still need it running for other problems but would like to know what to expect in here. What parts go bad in a setup like this. The v-band clamps seem to be holding fine. This fitting is more like what you would see on a long exhaust manifold, but a lot bigger.
     

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  2. heymccall

    heymccall Senior Member

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    Double check model number.
    I dont see HF270 in my sources.
     
  3. Birken Vogt

    Birken Vogt Charter Member

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    Right you are

    4045TF270
     
  4. Tones

    Tones Senior Member

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    HF275.
     
  5. mg2361

    mg2361 Senior Member

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    No seal ring. It is a "rolled" end to the tube that fits into the elbow. A flange with no gasket at the turbo. Probably a rotted out tube. Serial number?

    Edit: I just saw your other post. PE4045T623558 When looking up parts by serial number the option code for that exhaust is 6401.

    Exhaust Elbow.png
     
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  6. nowing75

    nowing75 Senior Member

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    just had that problem on our trencher same motor. I ended up replacing the short pipe and the elbow
     
  7. MarshallPowerGen

    MarshallPowerGen Senior Member

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    Had decent luck with cleaning parts and if not too rotten using some of the copper coat gasket paste to seal leaky exhaust sections.
     
  8. heymccall

    heymccall Senior Member

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    Cat recommens the 2P2333 high temperature sealer on exhaust connections that are essentially slip fit, like the 3116 3 piece exhaust manifold.
     
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  9. JLarson

    JLarson Senior Member

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    Even on new ones sometimes the casting job is so **** poor you have to goop em anyway lol
     
  10. treemuncher

    treemuncher Senior Member

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    I use JD's Power Assist app on my phone & tablet. Enter the engine serial number and the factory build options are at your finger tips with all of the part numbers you need. Makes life easier, for sure.
     
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  11. Birken Vogt

    Birken Vogt Charter Member

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    I got the parts in and the new item #2 is a looser fit in the item #3 than the original leaker was.

    I have JD starting a "case" now but we will see if they even care.

    What kind of goop do you recommend? I once used some white ceramic paste that came in a toothpaste tube and hardened into ceramic.
     
  12. JLarson

    JLarson Senior Member

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    Permatex has 80335, a 2000 degree goop, loctite has MR2000 too. Loctite is what cat sells as their sealer usually.