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Oil leaking from exhaust manifold

2andblue

Member
Member
I am on the opposite coast but to help narrow the issue

Maybe dumb question, not under an extended warranty?

Well known failure point is the exhaust cam sensor o-ring just above the exhaust manifold.

Is this an intermittent leak, e.g. smokes a bit after startup and then goes away with a little sniff throughout the day?

What year and how long has this been leaking. Is the leak worse than described above? Anything hitting the ground?

If it is the above it’s not a bad job, can help list the steps interested. Also the suggested O-Ring replacement for both the intake and exhaust cam sensors is a special size MOB (member) identified and can be found at Murphs kits.
 

harv1355800

Member
Member
2011. I had the valves adjusted a while back at 16K don't think that would cause the leak? The leak in worse dripping after shutdown off lower fairing onto the ground. I am trying to decide if I want to take on the work to replace the cam sensor o rings. I retired from working on aircraft engine in the military and just want to ride. Where can I get the Murphs kit?
 

2andblue

Member
Member
Did the leaking start immediate after the valve adjustment? If so I would be wondering about the head cover gasket...

Here is link to Murphs Kits for the C-14 and specifically here is the over sized O-Ring, you get 2 for both sensors. The exhaust sensor though pools oil behind it, the intake sensor is vertically oriented.
 

kzz1king

Member
Member
Did the leaking start immediate after the valve adjustment? If so I would be wondering about the head cover gasket...

Here is link to Murphs Kits for the C-14 and specifically here is the over sized O-Ring, you get 2 for both sensors. The exhaust sensor though pools oil behind it, the intake sensor is vertically oriented.
I think you meant valve cover gasket and with the amount of oil he is seeing that would be my guess too.
 

Konehead34

Member
Member
Its an easy repair, itll seem a little difficult becuz of the radiator but u dont have to remove the radiator to do the job....

Like the others suggest if ur leaking alot its probably the valve cover gasket. U dont mention what ur current mileage is, only that awhile back at 16k....
 

2andblue

Member
Member
I think you meant valve cover gasket and with the amount of oil he is seeing that would be my guess too.
Yes I did - the official Kawasaki part is called a head cover - but yes the ‘valve cover’ gasket is my thoughts given the amount of oil leaking.

Harv - does the leak worsen when put on the side stand vs the center stand?

Left and right edges of the ‘valve cover’ require some gasket sealer to prevent leakage, if out of the left side there is a spot oil pools there and would not be surprised if that’s where it’s leaking.

Also the fact you are not complaining about smoke makes me believe leak is on one of the edges...
 

Freddy

Street Cruiser
Forum Subscriber
If the oil leak is from the cover it can be easily rectified by fitting a half inch copper or fibre washer under the head of as many of the bolts that you can get to - one at a time. As the bolts have a shoulder which bottoms out on the head when tight, this gives about 0.5mm extra crush on the gasket thus preventing further leakage. The rubber gasket loses its elasticity over time with heat, allowing oil to seep out. Cover removal is not necessary, nor is sealant.
 
Last edited:

Tim R

Moderator
Staff member
Member
When I had my valves checked last time, the shop recommended the valve cover gasket be replaced. Yeah, It's rubber but they experienced a reduction in valve cover leaks. Also Freddy gives solid advice.
 
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