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Coolant leak.

2.8K views 14 replies 6 participants last post by  henkvdb  
#1 ·
Image


  • 2003 1800s, 118k miles
  • Found a small coolant puddle under the bike today.
  • August 1: 392 miles, my last ride. No signs of trouble. (End of season for me, hip replacement.)
  • September 18: My son took it out for maybe 80 miles. No signs of trouble.
  • September 26: Worked briefly on bike, looking into replacing bolts on side-cover to stop rattle. No signs of trouble. If there was a puddle back then we would have clearly noticed it.
  • Today, November 1: Small puddle under bike. Took picture above. Must have leaked during the five weeks since September 26, even though bike has not been used since September 18.

Temperatures in the garage probably went down to maybe 40-50 degrees last week, so could shrinking of the engine have allowed a small existing leak to start dripping? I have had coolant leaks before, too many, three water pumps replaced. Last replacement 30k miles ago, but I never had any leaks ABOVE the water pump.

Thoughts?
 
#6 ·
New photo. Crossover tube leaking? Note the discoloration on the fin on the right side.
Agreed?

Image



I looked around on Google for a bit and found the following video. Not that I would consider doing this myself, but just to get some idea on what would be involved getting this repaired. This is not a VTX, but it looks similar enough in the eyes of this a-technical moron (me) to understand what needs to be done.


Thoughts?
 
#10 ·
New photo. Crossover tube leaking? Note the discoloration on the fin on the right side.
Agreed?

View attachment 210832


I looked around on Google for a bit and found the following video. Not that I would consider doing this myself, but just to get some idea on what would be involved getting this repaired. This is not a VTX, but it looks similar enough in the eyes of this a-technical moron (me) to understand what needs to be done.


Thoughts?
You could do this. Get the angled picks or some bent stiff wire, and a few spare O-rings

There's no coolant tracking above this point, like where there rad cap sits?
 
#9 ·
Thank you Hans!
Before I saw this video my thinking was that in order to fix this, one cylinder would have to be removed.
But this 'left to right' shifting stuff absolutely makes it much easier. Those Honda guys know what they're doing!

Thanks for your help. I now know what the problem is and what needs to be done to fix it.
Depending on how my body/hip feels next April I may even try to do the repair myself.

Damnit, I am starting to look forward to riding again........ It's going to be a long winter.

:unsure: :):)
 
#8 ·
 
#13 ·
View attachment 210815
  • 2003 1800s, 118k miles
  • Found a small coolant puddle under the bike today.
  • August 1: 392 miles, my last ride. No signs of trouble. (End of season for me, hip replacement.)
  • September 18: My son took it out for maybe 80 miles. No signs of trouble.
  • September 26: Worked briefly on bike, looking into replacing bolts on side-cover to stop rattle. No signs of trouble. If there was a puddle back then we would have clearly noticed it.
  • Today, November 1: Small puddle under bike. Took picture above. Must have leaked during the five weeks since September 26, even though bike has not been used since September 18.
Temperatures in the garage probably went down to maybe 40-50 degrees last week, so could shrinking of the engine have allowed a small existing leak to start dripping? I have had coolant leaks before, too many, three water pumps replaced. Last replacement 30k miles ago, but I never had any leaks ABOVE the water pump. Thoughts?