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912UL is not sucking back coolant liquid

  • Przemysław Wiśniewski
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1 week 2 days ago #17190 by Przemysław Wiśniewski
Przemysław Wiśniewski created the topic: 912UL is not sucking back coolant liquid
I found that since a few flights my 912UL is not sucking back coolant from overflow bottle.
Effect is that I have more and more liquid in overflow and less in expansion tank.

I can't see any leak in overflow line and also other lines, I have standard big overflow bottle..

What can be?

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1 week 1 day ago #17192 by Rob Seaton
Rob Seaton replied the topic: 912UL is not sucking back coolant liquid
check the hose is not plugged.
Also it should be a good quality hose as the coolant is hot and under suction, surgical tubing or similar weak hose will collapse in these conditions.

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1 week 3 hours ago #17215 by Przemysław Wiśniewski
Przemysław Wiśniewski replied the topic: 912UL is not sucking back coolant liquid
Ok. I will replace it. Since 100hrs I had no problem. It started after I instlled carburetor heaters.

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