Oil Leak (newb needs help) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 05-10-2007, 09:59 PM Thread Starter
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Oil Leak (newb needs help)

So i'm brand new to riding and my 750 and general automotive work. But i'm a geek so i can be pretty patient and diligent at taking apart and putting together new things.

So i picked up an '86 Vulcan 750 tuesday. Thought i had given it a thorough going over before i signed the check, but i wake up wednesday morning to find a moderate puddle underneath the bike. Check the level and it's low, but just at the min, i'm too giddy to do anything but ride for a little bit and say i'll read up about it wednesday night / thursday.

So hear i am, thursday night and the resevoir is dry, and i'm seeing that oil leaks can be just about anything on this bike. . . from a broken seal inside, to a loose bolt outside to . . . well, whatever.

A little tinkering and it looks like it's coming from (or near) a smaller bolt a small distance (inch or a little more?) from the side stand on the left.

I've called a shop that's pretty close by to see what they could tell me, but thought i'd ask around in here as well.
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post #2 of 12 (permalink) Old 05-10-2007, 10:59 PM
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The plug on the side is a oil drain, there is a screen behind it. Good to check and see if there is anything floting in the motor.
What reserve are you talking about, there is no oil reserve on the bike.

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post #3 of 12 (permalink) Old 05-10-2007, 11:54 PM Thread Starter
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I'm most likely using the wrong terms, but i meant that i saw nothing through the window / oil level gauge.

And no, nothing floating in the motor (i'm guessing that'd be looking down, from the filler cap?).

I'll try fiddling around the drain plug tomorrow morning if i have the chance.
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post #4 of 12 (permalink) Old 05-11-2007, 02:19 PM
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Quote:
Originally Posted by svarog View Post
I'm most likely using the wrong terms, but i meant that i saw nothing through the window / oil level gauge.

And no, nothing floating in the motor (i'm guessing that'd be looking down, from the filler cap?).

I'll try fiddling around the drain plug tomorrow morning if i have the chance.
you will not be able to tell debris floating and stuff just from looking down the filler cap.
when you look at oil window if you see all black (don't see anything) thats oil level a bit above the window. you can confirm by tilting the bike to the right abit and watching the level appear. when it is empty you will see metal.

oil change and in your case checking the oil screen is not hard to do and not expencive. if it was resently changed i wouldn't even swap filter, just drain the oil, and reach in there for the screen and look for debris, some people find insects and stuff. can't really post any pics of drain bolt as my bike is not with me no longer.

as far as the problem the bolt might have been overtighten and stripped, or just not seating properly.

if you (or anyone else ) need oil screen i think i still should have one...

Ride Safe

Anton.
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post #5 of 12 (permalink) Old 05-11-2007, 04:10 PM
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It also could be an O-ring missing. There's supposed to be one around the drain plug surface. Hope you just have a loose oil drain plug or oring missing!
Welcome to the forum by the way!

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post #6 of 12 (permalink) Old 05-11-2007, 11:09 PM
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Sounds like it's from the side oil drain plug and could be something real simple
Take a look at this (lower right of the parts diagram) and it will show you what should be behind that bolt. Chances are something's missing or the o-ring is bad and needs replacing.

When you remove the bolt (slowly as the other parts don't go gushing out with the oil) you will need to poke a finger in to pull the screen out.

http://www.ronayers.com/fiche/400_04...0&parent=10700

Drain bolt
O-RING
SPRING
WASHER-PLAIN
GROMMET,OIL SCREEN
SCREEN

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post #7 of 12 (permalink) Old 05-12-2007, 02:03 PM Thread Starter
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Quote:
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when you look at oil window if you see all black (don't see anything) thats oil level a bit above the window. you can confirm by tilting the bike to the right abit and watching the level appear. when it is empty you will see metal.
This is good to know . . . mostly because i was reading the gauge wrong. I saw solid black and thought i was seeing the gauge empty.

A slight tilt to the right showed that the level is a little past the top. So i'm dealing with an overfilled bike (?).

How bad is this? Rode it again today to see what happens, feels fine. Didn't notice any drippings on a ten minute or slightly longer stop. I'll likely do a full change if i find the time later this week, but i want to make sure that riding with too much oil isn't going to do anything bad (or too bad).

The dripping seems to becoming not from the drain plug specifically.

Thanks again for all the help. Really wish i had more of a natural inclincation for this stuff, as it's definite fun tinkering . . . just being really cautious and mostly clueless.
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post #8 of 12 (permalink) Old 05-12-2007, 02:03 PM
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Oh yeah, and when you put the drain plug back in, don't overtighten it! Seems like 12 ft/lbs or 17 ft/lbs is the limit. Many have stripped that plug head or the threads!

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post #9 of 12 (permalink) Old 05-12-2007, 02:26 PM
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Take a 17 mm socket and open the drain a little, letting some of the oil out. Just keep an eye on the level on the sight glass and tighten the drain plug when you see a little bubble at the top of the sight glass. If the bike was seriously over filled with oil, I've heard if it coming out somewhere, not sure where, but maybe this is related to your seeping. ?? It is better not to overfill, for sure.

Fergy
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Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
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post #10 of 12 (permalink) Old 05-12-2007, 02:38 PM
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Quote:
Originally Posted by fergy View Post
Take a 17 mm socket and open the drain a little, letting some of the oil out. Just keep an eye on the level on the sight glass and tighten the drain plug when you see a little bubble at the top of the sight glass. If the bike was seriously over filled with oil, I've heard if it coming out somewhere, not sure where, but maybe this is related to your seeping. ?? It is better not to overfill, for sure.
i believe when you have exsess of oil it gets to your airbox via the cranck case breather hose - not good.

svarog,
if you can see the level with slight tilt of the bike i would say you are OK, on the level, bit above but perfecly fine.
as far as the leak leak, try to wipe everything clean and take a look at it in the morning, you should have at least slight idea about the source. maybe take some pics and post them here

Ride Safe

Anton.
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