Can coolant get into oil OTHER than head gasket?? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 05-11-2007, 07:24 AM Thread Starter
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Can coolant get into oil OTHER than head gasket??

I have not done compression test yet, this weekend.

Oil does appear to be cloudy, will check that more carefully also.

However, to use an entire overflow bottle of coolant in less than 80 miles, I would think it would be visible burning off as steam out the pipes, or at least steam clean the plugs from the action.

Plugs look fine.

Is there a way for coolant to get into the oil other than past a head gasket?

Any seal(s) in/around the water pump area?

Haven't gotten into this area of a Vulcan 750 so I have no experience.

I want to fix it, just want to be sure I AM Fixing the right thing.

Thanks in advance as always.

Jon

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post #2 of 8 (permalink) Old 05-11-2007, 07:32 AM
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Wasn't there a post recently about the mechanical seal on the coolant pump? Not sure if there'd be leakage past there, but I know there's a write-up in the Service Manual on how to check it.

No hairlines cracks in the overflow bottle, either?

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post #3 of 8 (permalink) Old 05-11-2007, 07:32 AM
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A cracked head maybe. I'd prob still suspect the head gasket. Honestly, at this point, you may be looking at replacing the head gasket anyway and having the heads cleaned and checked for cracks. Good luck.....

'92 Vn750

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post #4 of 8 (permalink) Old 05-11-2007, 09:14 AM
 
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The water pump is inside the crankcase, it has an internal seal and shares the right side cover gasket both of which would let coolant into the crankcase. If you are loosing that much coolant into your oil the level should be over full and milky. Another way for it to get into the oil is the lower cylynder gaskets. If your oil is good, I would look real close at the coolant reservoir and it's hose to the thermostat housing.
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post #5 of 8 (permalink) Old 05-11-2007, 10:18 AM Thread Starter
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Quote:
Originally Posted by wwmkwood View Post
The water pump is inside the crankcase, it has an internal seal and shares the right side cover gasket both of which would let coolant into the crankcase. If you are loosing that much coolant into your oil the level should be over full and milky. Another way for it to get into the oil is the lower cylynder gaskets. If your oil is good, I would look real close at the coolant reservoir and it's hose to the thermostat housing.
Oil is cloudy/milky and overfilled.

Is there a way to test for the lower cylinder gaskets? Would compression test do it?

There definitely is no external leaking (coolant reservoir for example), all dry and tight.

Jon

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post #6 of 8 (permalink) Old 05-11-2007, 10:42 AM
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I'm not sure a compression test will show bad gaskets. I think a compression test would be more for Valves.. Someone correct me on this....

'92 Vn750


Last edited by cmanningjr; 05-11-2007 at 10:43 AM. Reason: Can't spell....
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post #7 of 8 (permalink) Old 05-11-2007, 08:20 PM
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As stated above the water pump is in the crankcase on the right side. The right side cover gasket seals this from the oil. Also the shaft that turns the water pump runs off the oil pump which is on the left side of the motor and there is a seal in the crankcase around the drive rod if this was leaking you could also get coolant in the oil. A compression test would not necessarily show a small head gasket leak. If you were getting coolant in the combustion chamber it would probably show itself as running poorly, small wafts of whiteish smoke but close inspection of the plugs would also show its presence. I would probably lean more toward a gasket or seal leak. If the bike has been running ok and has'nt been overheated chances of bad headgasket are probably slim.
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post #8 of 8 (permalink) Old 05-11-2007, 09:55 PM Thread Starter
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Quote:
Originally Posted by slim View Post
As stated above the water pump is in the crankcase on the right side. The right side cover gasket seals this from the oil. Also the shaft that turns the water pump runs off the oil pump which is on the left side of the motor and there is a seal in the crankcase around the drive rod if this was leaking you could also get coolant in the oil. A compression test would not necessarily show a small head gasket leak. If you were getting coolant in the combustion chamber it would probably show itself as running poorly, small wafts of whiteish smoke but close inspection of the plugs would also show its presence. I would probably lean more toward a gasket or seal leak. If the bike has been running ok and has'nt been overheated chances of bad headgasket are probably slim.
I used an entire coolant bottle full in 80 miles of driving. I don't think that would be a small leak, I don't know, just my supposition.

I am at least the third owner and it was abused in its prior life. Pretty good coolant stain on life side of engine when I got it. Pretty confident it had been overheated in the past.

I will try the compression test tomorrow and see what develops from there.

Jon

93VN750, under re-construction
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Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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