cummins m11 turbo

Discussion in 'Trucks [ Eighteen Wheelers ]' started by earthmover, Dec 30, 2012.

  1. Dec 30, 2012 #1
    earthmover

    earthmover Medium Load Member

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    Jan 27, 2009
    castalia , north carolina
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    ok guys had the air filter pipe off doing a water pump change and looked at the turbo...the shaft has a little bite of play in it so I think I need to be looking in to 1 before something goes wrong...whats the best place to get 1???? I have seen reman. for 400.00 and new up to 1500.00the turbo is a holeset h55 I think is whats on it.. but will make sure..280hp m11+ cel. 1997 ......the truck has 598000 on it and I am sure its the factory unit, as everything else I have changed has been..
     
    earthmover, Dec 30, 2012
    earthmover, Dec 30, 2012
    #1
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  3. Dec 30, 2012 #2
    Heavyd

    Heavyd Road Train Member

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    Some shaft play is normal. Look for any signs of the fins hitting the housing. If not, it is probably ok. You should have someone check it before you fork over any money for a new turbo you might not need. You are allowed a few thousands end play, but side play clearance between the blades and housings can range from 0.006 to 0.025". The turbine center itself while spinning.
     
    Heavyd, Dec 30, 2012
    Heavyd, Dec 30, 2012
    #2
  4. Dec 30, 2012 #3
    allan5oh

    allan5oh Road Train Member

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    Jan 6, 2010
    Winnipeg, mb
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    Shaft play side to side is normal, but very little in and out is allowed. It cannot hit the housing. I wouldn't be surprised if that turbo could make it to 1.2 milliom miles without a problem. If in doubt take it to a shop that specializes in turbos.
     
    allan5oh, Dec 30, 2012
    allan5oh, Dec 30, 2012
    #3
  5. Dec 31, 2012 #4
    earthmover

    earthmover Medium Load Member

    563
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    Jan 27, 2009
    castalia , north carolina
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    thanks for the info .. I will get it checked out since its only a small amount of movement ...
     
    earthmover, Dec 31, 2012
    earthmover, Dec 31, 2012
    #4
  7. Dec 31, 2012 #5
    Heavyd

    Heavyd Road Train Member

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    The shaft is meant to "float" in the bushings. It isn't meant to be a tight fit. I'm sure your's is just fine. HNY!
     
    Heavyd, Dec 31, 2012
    Heavyd, Dec 31, 2012
    #5
  8. Jan 2, 2013 #6
    truckmechanic

    truckmechanic Medium Load Member

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    Jan 14, 2012
    Hi Desert Ca
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    M11 turbos seem to last a lot of miles only reason I replaced alot of them was for damaged fins on the inlet seems to be from over speeding the turbine or back pressure on the exhaust outlet side since those trucks had blowers on the exhaust aide to pressurize material trailers
     
    truckmechanic, Jan 2, 2013
    truckmechanic, Jan 2, 2013
    #6
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