merc 270 cdi injector seals

Discussion in 'Engine' started by chrisbrad66, Nov 1, 2011.

  1. chrisbrad66

    chrisbrad66 Hardcore MB Enthusiast

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    Hi all, i've got a merc 270 cdi engine in a jeep, number 5 injector seal is weeping, i have removed the injector twice, fitted new washers and stretch bolts but it still refuses to seal fully, i have even recut the seat using the special reamer you can buy but to no avail, has anyone had a similar problem with one that refuses to seal? Help needed please!!!!
     
  2. carat 3.6

    carat 3.6 Hardcore MB Enthusiast

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    Did you use the correct shape tip on the reamer?
     
  3. OP
    OP
    chrisbrad66

    chrisbrad66 Hardcore MB Enthusiast

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    i used the one that came with the tool, its not removable, i bought it from hutsons in widnes, its the only one they do for the 270 cdi engine i was led to believe, i have used the same tool before on sprinter engines and never had a problem
     
  4. murray motors

    murray motors Active Member

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    yes had this before had to change the injector i only use mb cooper washers make sure every thing is spot lessy clean put a slight bit of fire cement over the cooper washer (exhaust paste) this will seal a bit better and keep the heat away from the washer
     
  5. Ian B Walker

    Ian B Walker MB Club Veteran

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    Always run a tap down the stretch bolt hole. Doing this ensures that there is no debris in the thread or at the bottom of the hole. Then Torque it up to 7nm then 90 degrees and a further 90 degrees.
     
  6. OP
    OP
    chrisbrad66

    chrisbrad66 Hardcore MB Enthusiast

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    Thanks to all for the advice, the washer finally sealed after the third attempt and a third seat recut, i keep checking it everyday and all appears well! Fingers crossed
     
  7. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Cut the injector flat too.
     

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