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1980 42 Turbos on DD'S

Discussion in 'Post Yacht' started by SKOOB, Jul 19, 2014.

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  1. SKOOB, Jul 19, 2014
    #1
    SKOOB

    SKOOB New Member

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    Fellow post owner's I'm in the process of changing turbos on my 671's and my problem is the turbos are rusted to the exhaust housing. I've been soaking them in pb blaster tapping on them but can't break them loose, have not tried heating them yet but if anyone has any suggestions it would be greatly appreciated. THANKS
  2. Capt J, Jul 19, 2014
    #2
    Capt J

    Capt J Senior Member

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    Since you exhausted your other options, heat will be your friend. Either that or remove the exhaust housing and turbo's as 1 piece and having a machine shop heat them and get them apart on a work bench. If they're that rusted you will more than likely need new exhaust housings anyways.
  3. P46-Curaçao, Jul 19, 2014
    #3
    P46-Curaçao

    P46-Curaçao Senior Member

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    Had same problem recently, and heat was my friend indeed, but be careful with it inside the engine room, check your automatic fire extinguisher(s) location and have a hand extinguisher near you, or even better, have a helping hand nearby!
  4. Capt Ralph, Jul 19, 2014
    #4
    Capt Ralph

    Capt Ralph Senior Member

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    Nut cutting chisel. Cut or pop the nuts or bolt heads anyway you can.
    The blue-tipped wrench should be your very last resort.
  5. SKOOB, Jul 19, 2014
    #5
    SKOOB

    SKOOB New Member

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    Wasn't to crazy about open flame down below so ended up pulling exhaust with turbo, was more work but its out dropped it on garage floor a few times and it came apart will do other one tomorrow
  6. Capt J, Jul 19, 2014
    #6
    Capt J

    Capt J Senior Member

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    Easy enough. I would inspect both manifolds really good while you have them out and clean and paint them well. There is a compound/sealer you should put between the slip together/push together fittings on the exhaust. Fuchs 762 high temp joint compound. It's expensive but worth it. Also use it on any threaded bolts that go into the exhaust such as a bolt plug for attaching a boost gauge or EGT gauge.
  7. K1W1, Jul 19, 2014
    #7
    K1W1

    K1W1 Senior Member

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    Hi,

    You don't need expensive snake oil , Copper slip will work as well as anything
  8. Capt J, Jul 19, 2014
    #8
    Capt J

    Capt J Senior Member

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    It's not snake oil. It's a high temp joint compound which is Sold and recommended by D'Angelo's marine exhaust, the MTU/DD dealer, the Cat dealer and many others and used by just about everyone in the U.S. on exhaust.
  9. Capt J, Jul 19, 2014
    #9
    Capt J

    Capt J Senior Member

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    Perhaps you should try some!