Help, Overheated Turbo on Powerstroke 7.3

Discussion in 'PSI Superchargers Tech Questions' started by TAD240, Oct 14, 2008.

  1. TAD240

    TAD240 Member

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    I am looking at a 2002, F350, 7.3 Powerstroke, A/T dually crewcab, 86,000 miles. I have noticed that several of the trucks I have looked at have had some gold discoloration from heat on the cold or aluminum side of the turbo. What worries me about this truck is that it has more gold discoloration than any one I have seen. The finned aluminum cover plate on the cold side of the turbo that faces toward the passenger side of the truck and the hot/exhaust side of the turbo, is completely gold (I haven't seen any other truck with coloration here). The drivers side of the turbo where the air intake is has very little coloration on it (normal for other trucks I have looked at) and there is also very little coloration on the 2 output portions of the turbo that go into the manifold (normal for other trucks I have looked at). If you have one of these trucks, is your turbo discolored this way on the finned aluminum cover? Any opinions or ideas would be helpful. I am after certain specs on the truck I want that are hard to find and this one meets what I want but I don't want to have to put a turbo on it in six months. Thanks for your help and thanks for the website!!
     
    #1
    TAD240, Oct 14, 2008
  2. john348

    john348 Top Alcohol

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    does the shaft spin free
    that is more important than the color of it
     
    #2
    john348, Oct 15, 2008
  3. Mike Canter

    Mike Canter Top Dragster
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    It is hard to judge without actually seeing the turbo's. Turbo's get hot and there is no getting around it. I just put a new one on my motorhome diesel and it looked real pretty but after two thousand miles it was all heat discolored because I make 30 lbs of boost and it is doing it all the time going through the mountains pulling 23,000 lbs of motorhome. If the truck that had never been loaded or has never pulled anything then the turbo's would not show much heat because they are not being used. If you tow a large trailer then the turbo's are going to look discolored from heat. The fact that one side looks different from another side is probably due to the difference in airflow over the turbo. The self monitoring system (ECU) is pretty good on those trucks and if something was wrong you would have a check engine light. A funny thing about diesels is that they have higher EGTs from being too rich vice too lean. The ultimate diesel EGT and as high as you can go with full boost and full load is 1300*. If you make it too rich you will get black smoke and the EGT will go up which is bad for a diesel motor. If you make them too lean then you just don't get full power.

    If you are not sure of the condition of the truck then take into your local Ford dealer and have it checked first. I bet you they will tell you with no check engine light then there is no problem.

    Something important is those trucks run the EO4D automatic transmission and the fluid needs to be changed at least every 50,000 miles. If towing then maybe every 30,000 miles.
     
    #3
    Mike Canter, Oct 15, 2008
  4. JMR

    JMR Member

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    Try powerstroke.org.........excellant site!:)
     
    #4
    JMR, Oct 15, 2008
  5. Mike Canter

    Mike Canter Top Dragster
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    Here is another point. I believe those dual turbos are sequential in operation so one is always used more than the other. Again if you are towing then they will both heat up and discolor. If you don't push it hard then it will run more on one so they will be different colors.
     
    #5
    Mike Canter, Oct 15, 2008

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