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post #1 of 4 (permalink) Old 04-23-2019, 11:40 AM Thread Starter
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Last night, someone possibly took a bolt of the bottom of my VN750, and kicked over my EN500. Sad part is im supposed to be trading the 750 tomorrow, and now its leaking.
The leak is coming from the hole next to the coolant drain as seen in step 4 of https://www.vn750.com/forum/31-engin...l#/topics/6116
Any ideas as to why it is leaking, or how to remedy this? Ive been noodling this bike back to health fpr weeks, and only just finished the tuxedo stator mod. The guy im trading with has been very patient, and id hate to post pone it once again.
Thanks in advance fellas

Last edited by Richard Lawrence; 04-23-2019 at 11:48 AM. Reason: Mistakenly thought there was a bolt
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post #2 of 4 (permalink) Old 04-23-2019, 03:11 PM
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Can you tell what fluid it is? I'm not super familiar with all the holes and bolts, but there's a weep hole somewhere that goes from the spark plug hole down to the bottom of the casting. If the bike was washed, then moved, maybe some extra water just found its way to the drain?

1992 US-nonCA * tuxedo mod * r/r relocated

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post #3 of 4 (permalink) Old 04-23-2019, 05:17 PM Thread Starter
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Its oil for sure
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post #4 of 4 (permalink) Old 04-24-2019, 05:06 PM
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There is a weep hole next to the coolant drain plug, which is designed to let you know when the water pump mechanical seal is failing. I have never had a Vulcan 750 engine apart, so there may be oil on one side of that seal. If the bolt has been removed, the cooling system would be empty. However, draining the coolant would not cause an oil leak. If oil is coming out of that hole, it already had an oil leak. I would first make sure that is where the oil is coming from, check to see if there is coolant inn the system, and assuming there is not, make sure the bolt is in place and refill it with coolant, check the oil level, and try starting it. Then watch that hole and see if anything comes out. Since you said you did the tuxedo mod, if you did it without first removing the stator cover, there will be a considerable amount of metal shavings in the oil. Those could have damaged the water pump seal.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
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