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Posted

Hello i was wondering if someone could help me out iv recently got a Kawasaki klf 220 it needed big end bearing changing so i rebuilt the engine and the bike has compression starts first time every time but after i have been riding for about 10 minutes oil starts to leak from the head just below the exhaust so i replaced the gasket still done it so i took it to a shop he done the same and it is still doing it any information would be great thank you

Posted

Welcome to Quadcrazy.  
The top of the head has two valve adjustment caps. Have you checked them? They have small rubber rings underneath them they get flattened out and go bad. I would check them clean them off good put some silicone on them leave the gasket in place and bolt them back down.

When you rebuilt the engine im assuming you changed the valve stem seals ? 

Lastly is the valve cover itself. Have you checked it for any warps or dents where the gasket is not sealing the gap? This can be done by pulling the valve cover off and placing it on a flat surface and slide a piece of paper around the edges  to see if it slips under the cover at any point. 
 

Posted (edited)

the vale adjustment caps have 2 new o rings in them the oil inst coming from there . and yeah i changed the valve seals they is no oil on the valves and the bike inst burning oil .

I have not checked for warps  i know they is no dents or scratches is they anyway i can do this without replacing gaskets everytime

also is they anything i can do with a compression tester to see anything 

 

Edited by EoNe Frost Vortex
Posted

You could technically pull the spark plug wire off and crank the engine and spray the head down with windex to see if your getting bubbles or any substantial pressure out of any place but I don't think thats going to show much because its prob a low pressure leak. 
The crank case has a breather hose, have you checked that it's properly venting and not kinked or clogged? 
The only other way i have ever traced an oil leak that I could not see was using graphite or talcum powder. I literally squeezed the tube in the area of the smoke.   The powder sticks to the oil showing a trail.   

Now, aside from and before you do all this you can simply pull the valve cover off, apply a coat of high heat silicone on both sides of the gasket and re install and see if the problem stops.   If so its a warped valve cover
Let it dry 12 hours ! 

 

Posted (edited)

so if i get like some sort of clamp to clamp the head down manually see if that works ? 

also the compression on the quad its self is crazy good so it cant be rings or anything 

5 minutes ago, Frank Angerano said:

You could technically pull the spark plug wire off and crank the engine and spray the head down with windex to see if your getting bubbles or any substantial pressure out of any place but I don't think thats going to show much because its prob a low pressure leak. 
The crank case has a breather hose, have you checked that it's properly venting and not kinked or clogged? 
The only other way i have ever traced an oil leak that I could not see was using graphite or talcum powder. I literally squeezed the tube in the area of the smoke.   The powder sticks to the oil showing a trail.   

Now, aside from and before you do all this you can simply pull the valve cover off, apply a coat of high heat silicone on both sides of the gasket and re install and see if the problem stops.   If so its a warped valve cover. 
Let it dry 12 hours ! 

 

 

Edited by EoNe Frost Vortex
Posted

Pull the valve cover off and wipe everything down so there is no oil, apply high heat silicone on both sides of the gasket.  Put it all back together and tighten the bolts down in a crisscross pattern and let it dry good.  No clamps or anything.  
 

If rings are bad you would be blowing bluish smoke.  Same for valve seals.  

Posted

I replaced all of the top end gaskets on a quad a while back and after about 5 rides it had blown the head gasket and was leaking oil around the valve covers.  The rubber in the orings was just weak and so they crushed when installing and it was leaking.  Ended up replacing most of the gaskets again with OEM and it had no issues.

Posted

Nothing to really recommend other then verifying that

1. The seals aren't defective.

2. They are the proper seals for that engine. 
3. You installed then properly. 
Ive made simple mistakes like not  seating the seals correctly. 

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