351 windsor heat exchanger sizing

Discussion in 'Gas Engines' started by Zappi, Oct 16, 2009.

  1. Zappi
    Joined: Oct 2008
    Posts: 103
    Likes: 2, Points: 0, Legacy Rep: 31
    Location: Puget Sound

    Zappi Senior Member

    My buddy has a 28' Trawler type cruiser with a 351 Windsor v drive powering it. He recently bought the boat and it has a fairly new heat exchanger on it. She overheats on anything more than an idle. Every piece of the coolant system has been replaced or cleaned but no change in temp.
    My thought is the heat exchanger must be too small.
    Is there a predetermined size that should be used for this motor?????
    Thank you!
  2. gonzo
    Joined: Aug 2002
    Posts: 16,652
    Likes: 1,615, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    The coolant water comes out of the exhaust. Are the manifolds and risers clean or corroded and clogged? They can prevent the raw water from circulating and overheat the engine. I assume the water intake is clean and the raw water pump was overhauled too
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