oil showing up in radiator - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 18 (permalink) Old 10-29-2011, 08:19 PM Thread Starter
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oil showing up in radiator

Ok the bike got hot really fast on my ride today. Got back and the radiator was low so I added water. Brown sludge came out of top as I over filled it. There is no water showing up in the oil at this time.

So could it be the water pump seal?
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post #2 of 18 (permalink) Old 10-29-2011, 08:24 PM
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It might not be oil. Might be old sealer or sediment in there. Probably needs a good flush and fill.

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Hmm....she was on the back when we left.... ??
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post #3 of 18 (permalink) Old 10-29-2011, 08:29 PM Thread Starter
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it smells just like oil. I put my finger in it and it smells and feels just like oil, it has that slick look to it too.
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post #4 of 18 (permalink) Old 10-29-2011, 08:31 PM
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flush it and investigate further

'86 VN750 13,700 mi -Stock
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post #5 of 18 (permalink) Old 10-29-2011, 08:57 PM
If only it had 6th gear..
 
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Quote:
Originally Posted by Ottergirl View Post
it smells just like oil. I put my finger in it and it smells and feels just like oil, it has that slick look to it too.
but your engine oil looks good though? Didn't the bike sit for a long time before you got it? I'm still not thinking its the water pump seal, although I haven't got any experience in that area of the bike but I would think your engine oil would show trouble too if it was. Some additives have a slick consistency to them. I'm sure others will help out. Hope it isn't serious for you tho.

Dave

Mods:
Jetted, shaved & coastered
Home made under-tank single filter
Converted ACCT's to manual (thanks wib714)
Dual vac lines on petcock (my cure for ticking)
LED tail/plate lights
Relocated helmet lock to license plate

Added stuff:
Customized hard bags w/ lights
Chrome levers
Hellcat windscreen
LED running lights
Home made 'Vita-Volt' meter
Foot rests on engine guard
Tunes

Hmm....she was on the back when we left.... ??
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post #6 of 18 (permalink) Old 10-29-2011, 09:24 PM
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X3,,, Drain, Flush, Refill w/water, investigate further, could just be crude floating around.Or, someone is playing a "Bad" joke on you. If the crankcase is "Making Oil" ( quanity increasing )then thats a different story.


Vulcan #1 1993 - 28K
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Last edited by OldHipWesTex; 10-29-2011 at 09:26 PM.
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post #7 of 18 (permalink) Old 10-29-2011, 11:42 PM
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Is your oil low, If not then it probabley is not oil.

Chad Falstad "Hawk"
Vroc #17649
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"
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post #8 of 18 (permalink) Old 10-30-2011, 12:02 AM
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Mine was awful the first time I flushed it. Brown and slimy... I had to flush it sooo many times to get the water to come out clear.

The radiator still has rust n stuff in it. Couldn't get it all out and as far as I can tell, the radiator can't be opened up and serviced like a car radiator... which SUCKS.
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post #9 of 18 (permalink) Old 10-30-2011, 12:51 AM Thread Starter
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Thanks guy. I will try flushing it and report back as to what happens.
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post #10 of 18 (permalink) Old 10-30-2011, 01:00 AM
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If it is oil, it could be the water pump mechanical seal, a head gasket, or even a crack in one of the cylinders or heads. But I would not jump to conclusions yet. If it is that bad, I would remove the radiator, and the thermostat (which could be bad if it overheated quickly), all the drain plugs, and give it a good flushing out. If it's REALLY bad, I would use a flushing chemical designed for aluminum engines. I normally don't recommend doing that, as it is hard on aluminum, but if your cooling system is plugged up somehow, it is to late to worry about that. Stick a hose in the inlet, and let it run for a while till it comes out clear. After a good cleaning, and after getting everything put back together, I do recommend flushing it good with distilled water to remove all the mineral water and flushing chemical, before filling it up with fresh coolant.

I am a motorcyclist, NOT a biker.


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