Coolant Leak - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 5 (permalink) Old 05-24-2007, 11:01 PM Thread Starter
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Coolant Leak

96 VN750 with 22+K miles
Got to work this morning and realized I had a coolant leak. I traced it to the right side bottom of the engine, there seems to be a hole where the coolant is dripping from.
Is this a weep hole or what?
After looking in “Clymer” (page 351 – 352, figure 18), the best I can make out it looks like there is a hole out the bottom just behind the mechanical seal (A). Would damage to this seal or just time allow coolant to get past this seal?
I guess what I really want to know is does anyone know if coolant from this area means I need to replace the mechanical seal or do I need to keep looking?

Thanks all,
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post #2 of 5 (permalink) Old 05-25-2007, 11:18 AM
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There is a coolant drain screw on the right bottom of the engine, with a 10mm head on it. If that is close to where the drip is coming from, maybe it's gasket or washer is flattened and or the screw is loose, or worse, missing? I wouldn't think if it was missing you'd have any coolant left??

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post #3 of 5 (permalink) Old 05-25-2007, 01:07 PM
 
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Hey BVP. I had the same issue. Yes, I believe that this is due to the mechanical seal. I had a pretty stout leak coming from that hole one evening. So, I undid the coolant drain bolt that's right next to the hole and tightened it back up. The leak was gone. I saw it as a potential problem with the mechanical seal and I am planning on replacing it at the end of the season.

I am new to motorcycle engines but not wrenching. If you find the problem to be caused by something else I would love to hear about your experience. This is just my problem solving with this issue.
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post #4 of 5 (permalink) Old 05-25-2007, 08:12 PM Thread Starter
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Didn't ride today because of the leak yesterday. Left the bike up on the center stand to help ID where the leak was coming from. Well, no good, no leakage signs anywhere under the bike this morning. So I thought maybe I did not have any coolant left in the bike (this sent a chill up my spine). Took off the cap and the system is full. I now do not have a clue, is it just the first signs of a problem, a one time occurance or may be gremlins. I plain on riding the next couple of day with a water bottle handy just in case and watching it closely. I hate mistery leaks!

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post #5 of 5 (permalink) Old 05-25-2007, 08:30 PM
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Quote:
Originally Posted by BVP View Post
I hate mistery leaks!

BVP
Even worse, my problem, mystery consumption.

Jon

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