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  #1  
Old 01-07-2015, 01:00 PM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 91
Default coolant leak

I have a slight coolant leak that I can not find where it is leaking, does
know of a coolant pressure tester that will work with the Rotax coolant
system?
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  #2  
Old 01-07-2015, 01:35 PM
f1rocket's Avatar
f1rocket f1rocket is offline
 
Join Date: Jan 2005
Location: Martinsville, IN
Posts: 2,256
Default

I don't know about a tester, but I had a tough time getting my hoses tight enough to not leak, especially from the water pump and into and out of the radiator.
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  #3  
Old 01-07-2015, 05:22 PM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 91
Default coolant leak

The only place that I see coolant is in the bottom of the cowling
and the hanger floor under the back of the bottom cowl.
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  #4  
Old 01-07-2015, 07:33 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,095
Default

I'm digging back here, but as I recall there is a weep hole on the bottom of the water pump that monitors the water pump seal. Might want to check and see if it's wet.

Rich
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  #5  
Old 01-07-2015, 08:06 PM
Mich48041 Mich48041 is offline
 
Join Date: Apr 2008
Location: Riley TWP MI
Posts: 2,512
Default

"O" rings can leak if not seated properly between the intake manifold and engine case.
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  #6  
Old 01-07-2015, 08:44 PM
VRBaker VRBaker is offline
 
Join Date: Aug 2014
Location: Carson City, Nv
Posts: 11
Default

My Rotax 912 ULS will loose a little coolant from various places while sitting in a hangar where temperatures are dropping below freezing. A chat with Lockwood indicates this is not unusual.
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  #7  
Old 01-08-2015, 05:35 AM
edward7048 edward7048 is offline
 
Join Date: May 2010
Location: Kokomo, In.
Posts: 91
Default coolant leak

Thank for the info. I will check each of the above items.
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  #8  
Old 01-08-2015, 09:15 AM
Loki Loki is offline
 
Join Date: Oct 2014
Location: Marysvale, UT
Posts: 53
Default

The water pump has a ceramic seall and a weep hole on the bottom of the pump. During times of cold temps the different contraction rates between different metals and seals can cause a very small leak. This is usually limited to a tablespoon or so of coolant. This can be quite normal and can be on and off. So long as you don't have a large puddle on the ground I wouldn't worry.
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  #9  
Old 01-08-2015, 10:08 AM
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flyboy1963 flyboy1963 is offline
 
Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,293
Default too funny!

...I started reading this, and chuckled....." there's no coolant in a Lycoming.....'cept fer that AIR flowing everywhere...."

...and then went back to wiping OIL from my lower cowling!

( as they say, no free lunch)
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  #10  
Old 01-08-2015, 10:13 AM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,095
Default

That's OK, Perry with the money we save on gas we can afford more maintenance than Lycoming owners!

Rich
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