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  1. #1
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    Jun 2008
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    40

    white sludge / film underside valve covers

    We run on smaller lakes and it is hard to build and maintain good oil temps above 180 to 200 consistantly. With that being said the oil in my pan always looks good after running but ther is always this white film under the valve covers. People have told me its just codensation but its driving me nuts
    Had the motor gone thru this winter , same thing? I have a crossover and no oil cooler, water temps up here range from 50 to 65 degrees any thoughts?

  2. #2
    Platinum Member Platinum Member Smitty's Avatar
    My Boats:
    2000 Baja 36 Outlaw
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    Apr 2001
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    Hawthorn Woods IL
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    3,958
    The motor is just not getting hot enough. Do you have a T-stat?? If not try one or maybe a restrictor in place of the T-stat.

    You also might check to make sure you have at least one pcv valve or fitting that is under a vacuum load while the engine is running. It will help pull the moisture out of the block. Regular breathers just relieve pressure.

    Smitty
    Want your ECU tuned right?? Call Mark at Precision www.pmefi.com

  3. #3
    Registered BY U BOY's Avatar
    My Boats:
    91 Scarab 21' Excel/1999 Proline 200 sport
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    Aug 2005
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    HOUSTON ,TX
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    oil cooler with T-stat

  4. #4
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    Jun 2008
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    Smitty no thermostat just breather lines from valve covers to a breather tank, so you have seen this before?

  5. #5
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    Jun 2008
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    I dont see what an oil cooler even with a thermostat would do since I have a hard time building even 200 degrees?

  6. #6
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    My Boats:
    1994 Baja 236 500HP
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    Oct 2005
    Location
    Millstadt, IL and LOTO 3mm
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    1,766
    Quote Originally Posted by Smoothsix View Post
    We run on smaller lakes and it is hard to build and maintain good oil temps above 180 to 200 consistantly. With that being said the oil in my pan always looks good after running but ther is always this white film under the valve covers. People have told me its just codensation but its driving me nuts
    Had the motor gone thru this winter , same thing? I have a crossover and no oil cooler, water temps up here range from 50 to 65 degrees any thoughts?
    Do you have a aftermarket cam?

  7. #7
    Registered Biggus's Avatar
    My Boats:
    02 Cigarette Mystique T/S
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    Apr 2001
    Location
    Naples, Maine
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    5,955
    I had the same problem in my Cigarette. The oil thermostat cured it. The thermostat by-passes the oil cooler until oil temps reach 215 degrees.

    We used the Keith Eickert unit from Hardin Marine.

    Kurt

  8. #8
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    Jun 2008
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    40
    The motor is a 598ci with no oil cooler

  9. #9
    Platinum Member Platinum Member Rookie's Avatar
    My Boats:
    30 Scarab Panther
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    Jan 2003
    Location
    Grand Rapids, MI
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    2,936
    Quote Originally Posted by Smoothsix View Post
    The motor is a 598ci with no oil cooler
    No oil cooler!!
    No matter how pretty she is, there is a guy who is sick of her S#!t


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