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Thread: 2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

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    2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

    I’m at my wit's end.

    My radiator continues to burp.

    I’ve replaced the (OEM) thermostat, hoses, radiator, and overflow reservoir.

    The overflow fills during the course of driving and does not empty once the engine cools.

    I don’t have overheating.

    I did a pressure test, and it holds without issues.

    Any ideas?


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    Re: 2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

    It sounds like an air pocket friend.

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    Re: 2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

    How long can it burp?

    I use a burping funnel and let it run for quite a long time with the heater on, then off.


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    System Operator IGOTASUBARU's Avatar

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    Re: 2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

    Drain the system about half way, then add it back slowly.

    You have to have an air pocket, and once you get one, it's hard to get rid of.

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  9. Top Of Page | #5
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    Re: 2003 EZ30D - No Combustion Gas In Coolant But Reservoir Not Draining When Cold

    I bought a vacuum coolant filler.

    I’m going to give that a go.

    I’ll keep you posted.


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