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Proper PSI on 8v92 expansion tank cap

Discussion in 'Technical Discussion' started by Pio Casadey, Jun 15, 2017.

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  1. Pio Casadey

    Pio Casadey New Member

    Joined:
    May 14, 2017
    Messages:
    9
    Location:
    Port Otange florida
    What is the proper PSI that should be used on the expansion coolant tank cap on the Detroit 8v92
  2. Capt J

    Capt J Senior Member

    Joined:
    Jul 11, 2005
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    9,404
    Location:
    Fort Lauderdale
    13 psi
  3. rcrapps

    rcrapps Senior Member

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    Sep 8, 2004
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    Location:
    Jax FL
    I was thinking 7 to 9. You running a closed system? Give me a serial number and I'll get what the factory specs.

    Where is Port Otange FL?
    Maybe Port Orange, South Daytona?
  4. RT46

    RT46 Senior Member

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    Feb 22, 2011
    Messages:
    939
    Location:
    Long Island, NY
    8 psi is the number that pops in my head
  5. Just Cruisin

    Just Cruisin New Member

    Joined:
    May 15, 2016
    Messages:
    17
    Location:
    Detroit, MI
    I have 8v92's TA-DD - 1994. I just had to replace the old cracked caps and found the caps and tank are actually a caterpillar part. The caps only are 3362022. My system indicated 7 psi. New caps are vented but the boat ran at 168 degrees with no issue.
  6. Pio Casadey

    Pio Casadey New Member

    Joined:
    May 14, 2017
    Messages:
    9
    Location:
    Port Otange florida
    OK checked the caps on both engines they are 7psi. Both are kind of rough and they are not DD. Can I use any type of cap? say from napa etc or do I need to get from DD.
  7. rcrapps

    rcrapps Senior Member

    Joined:
    Sep 8, 2004
    Messages:
    4,536
    Location:
    Jax FL
    Yes
    The better part guy (person) at the counter can find the correct cap. There will be two different caps. Go for the closed system. If not already, upgrade your system to a recovery system. Your bilges would welcome it.

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