Question about Polaris ATV

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There is a clear tube behind the pull sart housing and above the water pump that leaks coolant when my 1997 polaris 400 exlorer 2 stroke gets to operating temp. What does this mean

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  • david_barbos Jul 22, 2009

    This tube is coming from the right side of the engine and attaches to the actual housing of the water pump not the rad and is not attached to anything and seems to vent to the atmosphere. I filled the overflow tank to the level it is suppose to be at but coolant is being lost through this tube.

  • david_barbos Jul 22, 2009

    there is a clear tube behind the pull sart housing and above the water pump that leaks coolant after reving the engine when my 1997 polaris 400 exlorer 2 stroke gets to operating temp. What does this mean

    - This tube is coming from the right side of the engine and attaches to the actual housing of the water pump not the rad and is not attached to anything and seems to vent to the atmosphere. I filled the overflow tank to the level it is suppose to be at but coolant is being lost through this tube.

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  • Master
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There is most likely corrosion on the aluminum or steel connector pipe for the hose, you must drain the coolant and remove the pull start housing to gain access to the clamps for the hose, unscrew and remove the hose and clean the pipe or pipes connections with a wire brush and sand paper strip to remove any corrosion on the aluminum or steel tubing, also make sure the inside of the rubber tubing is clean I would just replace the hose while I was in there. Replace hose, tighten clamps, and add coolant to proper level. Start and check for leaks.

Posted on Jul 22, 2009

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  • Master
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That is the overflow line on the coolant tank. Perhaps your overflow tank was filled with coolant above the full line. Some times the radiator may release some of the coolant into the overflow tank when the engine gets hot. But, if the over flow tank is to full it will be released out of the tank through the overflow hose. Also remember that liquids expand when hot, so if you have it filled too full, then you should expect some to release when the engine warms up until the right amount is int there.

Another reason may be because the engine over heats and the coolant gets deposited into the overflow tank in large quantity thus expelling it through the overflow hose. Most likely I would think that you overfilled it and the engine is not overheating but then again I don't know what you have been doing with this vehicle and whether it is operating perfectly. Let me know what how this turns out.


Benjamin

Posted on Jul 22, 2009

  • Benjamin Patri
    Benjamin Patri Jul 22, 2009

    Its still an overflow tube, as long as it isn't drastically loosing fluid so that your reservoir is running out, you should be fine though as long as its just a little here and there and not a quart of fluid running out. I would check the oil mixture that you are putting in, incase that the engine is running a little warmer than usual if there is an excessive amount running out. If it was coming out somewhere else, that it shouldn't be, then I'd say you have a problem, but as long as the reservoir keeps a good amount and the engine is running at normal temperature, you are fine

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