wynne67
Parking Attendant
Posts: 15
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posted May 31, 2011 10:29 AM
Expansion tank bubbling?
Hi all, I noticed recently that after a trip and when I stop and turn the engine off that the expansion tank bubbles up. It only happens when I turn the engine off, it's not overheating and the coolant level doesn't seem to go down so it can't be losing any. Any ideas?
  
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Drp
Parking Attendant
Posts: 24
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posted June 01, 2011 05:07 PM
quote:
Hi all, I noticed recently that after a trip and when I stop and turn the engine off that the expansion tank bubbles up. It only happens when I turn the engine off, it's not overheating and the coolant level doesn't seem to go down so it can't be losing any. Any ideas?
.
Hi there
Does your fan work!!
When the engine is turned off, it will get hotter because the water isn't circulating , but the fan should still cut in , even with the ignition switched off.
Check to see if your fan works !!!
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wynne67
Parking Attendant
Posts: 15
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posted June 01, 2011 10:57 PM
Hi, I took the expansion tank cap off and ran the engine, and when the engine got hot it overflowed and the fan cut in, so the fan works. However I noticed the radiator cap was bent so I'm going to replace that to see if that is whats cUsing the fault. Could it be that?
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entropy
Moderator
Posts: 8671
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posted June 04, 2011 01:05 AM
 Edited By: entropy on 4 Jun 2011 09:07
a non sealing cap could certainly do it.
cross yr fingers.
if the new cap doesn't fix it, bubbling into the overflow = leaky HG
level in overflow should go up when hot, return to "full" level when cold.
been there, done that 
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This moderator uses moderation in moderation
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herbg26
Expert Class
Posts: 141
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posted June 04, 2011 12:34 PM
+1 on what entropy said.
Herb
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Kawasaki lover
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