Oil Pan Leak? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 05-16-2016, 10:59 AM Thread Starter
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Oil Pan Leak?

Hello,

So I acquired a new-to-me 1995 Vulcan 750 over the weekend, and while I did a somewhat good overview of it when I bought it, I'm not a wrencher (I'm willing to learn!). I took it out for a short drive yesterday afternoon, and when I checked on it this morning, there was a very small leak of what appears to be oil?. It's a small leak; one drop on the floor of the garage, one drop hanging by what I believe to be the oil pan, from sitting overnight in the garage on the center stand. Any ideas what is causing this and how to fix it? Picture attached - it's from the right side of the bike.
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post #2 of 9 (permalink) Old 05-16-2016, 11:19 AM
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Looks like it might be really dirty coolant (dirt from side of bike)? Was the bike on its center stand overnight? (just odd to see liquid hanging off the right side). I have a small coolant leak out of the head gasket of my rear right corner of my rear cylinder. If my bike were upright I think it would drip right there... The thing is, I think it will only drip a couple drops after each time riding it, so it's sort of hard to pinpoint.
After your next ride I'd clean off the area really well and tape a paper towel along where you think the liquid might be coming from before you walk away. You should be able to trace it back to the source after a couple times.

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post #3 of 9 (permalink) Old 05-16-2016, 11:25 AM Thread Starter
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Thanks, Thorn. Yeah, it was on its center stand overnight. Is that okay for the bike, or should I just use the side stand?

My plan is to pick up some simple green or similar today and clean up the entire underside (it's pretty dirty) and see where it's coming from.

Do you think it's coming from higher up on the bike then? that drop that's hanging is just kinda there along what looks like a screw hole in the oil pan (not sure if it is or not). Could it be coming from there? The liquid is orangish in color against my finger - the coolant in the coolant reservoir is green.
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post #4 of 9 (permalink) Old 05-16-2016, 12:22 PM
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The color is pretty peculiar, but it doesn't look 'oily' to me. Might just be the picture.

I'm partially basing my guess that the leak is higher up because it looks like the whole underside is not just dirty, but a wet sort of grimy, like the whole area is perpetually wet and the dirt gets embedded over time. A leak doesn't spread up, so it must be coming from higher up ... or the previous owner just drove through some puddles. some cleaning will go a long way towards solving the mystery.

I don't think it really makes a difference what stand is in use.

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post #5 of 9 (permalink) Old 05-16-2016, 12:28 PM Thread Starter
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Thanks again, Thorn. I'll clean it up after I ride it tonight and update with any new info.
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post #6 of 9 (permalink) Old 05-16-2016, 01:58 PM
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There is a 'drain' on the right side of the bike that allows oil or coolant (depending on what seal fails) to drain out of the engine.. bad news is, if thats where its comming from, its probably the water pump seal(s).

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post #7 of 9 (permalink) Old 05-16-2016, 04:48 PM Thread Starter
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Ding Ding Ding! michiganteddybear wins! That indeed looks to be the water pump weep hole. Once I got the correct terminology down, a search on the forums indicates it might be the mechanical seal - the liquid doesn't have the consistency of oil, and the color could be due to road dirt. I'll start looking up the replacement procedure for that - it appears to be easier that if it was oil! That would apparently require removing the engine completely.

Thanks again!
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post #8 of 9 (permalink) Old 05-18-2016, 08:47 AM
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If you drain and flush the cooling system with distilled water, and put in new coolant, it might stop leaking all by itself. I used to use Maxima Coolanol, but have started using Ford Motorcraft coolant. It is silicate free, and according to many mechanics is the best coolant money can buy. It is a yellowish color, and needs to be mixed 50/50 with distilled water.

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post #9 of 9 (permalink) Old 05-18-2016, 10:59 PM Thread Starter
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Thanks for the tip, Jerry! I'll check that out!
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