How are Thai Long Tail Boats Cooled?

Discussion in 'Propulsion' started by HeyK20, Jun 22, 2021.

  1. HeyK20
    Joined: Jun 2021
    Posts: 1
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    Location: United States

    HeyK20 New Member

    I've been fascinated with how these boats are set up and I was not able to find this information anywhere. I saw that a lot of these long tail boats have automotive engines on them. I was wondering how they are cooled. I've looked around and some say that they have a water to water heat exchanger on them, but after watching a handful of videos, that I didn't seem to be the cause (most of the time). It almost looked like the water went in one end of the block and out the other without anything in between (except water pump). It didn't even look like they had a thermostat. Wouldn't running this cold of water through a block cause some issues, especially on diesel engines? Am I missing something, or do they just not care about longevity/efficiency?
  2. DogCavalry
    Joined: Sep 2019
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    Location: Vancouver bc

    DogCavalry Soy Soylent Green: I can't believe it's not people

    Maybe they don't care. I can get a half dozen chev v6 vortec engines for the labour of pulling them from the wrecks they are in. If they only last a year, it's still cheap.
  3. BlueBell
    Joined: May 2017
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    Location: Victoria BC Canada

    BlueBell . . . _ _ _ . . . _ _ _

    How it is plumbed is perhaps different on every rig.
    Thermostat, no thermostat, they are racing engines, makes little difference.
    Unless there are flow issues due to lack of back-pressure.
    They may even take the water pump off and use forced water from making-way.
    There are long-tail guys on here that would know...

  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    First, they are not racing engines. Second, thermostats make a huge difference. They don't only regulate the temperature, but maintain back pressure and direct flow to prevent air pockets in the cooling jacket.
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