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Oil leak

  #1  
Old 02-24-2018, 10:14 AM
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Default Oil leak

greeting everybody.

I have spent plenty of time researching online on for some ideas or trying to see if anybody has had the same issue. I have found a couple things online, but still having localized the issue. I am turning to you guys for help. I have a 2004 cbr600 f4i with 16k miles on it. It is currently leaking oil from the left side on bike. more specifically, behind and above the water pump. oil works it way down to the oil pan and onto the exhaust, however due to limited space I am having a hard time identifying where it is coming from. So far, I have completely cleaned the entire engine, I have ran the bike to see if I can find the leak, but still no luck. there is oil residue on the water pump and it's surround areas
it is kind if hard to tell, but the oil is coming from near that black plastic sensor on the top right
just another shot.
I see oil build up around the water pump and it surround areas. I also took apart the entire intake system to get to the CCT, everything is good there. Since I took intake manifold off, I noticed that the oil leak is starting from the top, but I have no idea where. I will post some picture. I am turning to you guys from so help and guidance.
 
  #2  
Old 02-24-2018, 10:49 AM
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Hard to tell by those pictures. The speed sensor is sealed by an o ring. If you have doubts about it. Replace the seal. Any auto parts store should be able to match one up for you.

How does the valve cover and cylinder head gasket look?
 
  #3  
Old 02-24-2018, 10:53 AM
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The valve cover and head gasket is clean. I just noticed on the CCT, is there to suppose to be a bolt threaded in the center? If not, would that cause a leak?
 
  #4  
Old 02-24-2018, 11:08 AM
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There should be a bolt plug with a seal. It's put in after its installed and the holding tool is pulled out.
 
  #5  
Old 02-24-2018, 11:20 AM
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Originally Posted by 74demon View Post

How does the valve cover and cylinder head gasket look?
+1^^

Just cos it's making an appearance from behind the water pump, doesn't mean that's the source.

Oil will run down, due to gravity, but it will also get blown about as you ride.

Valve cover seals are a very common source of oil seepage.
 
  #6  
Old 02-24-2018, 12:21 PM
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well great, the bolt to the CCT is completely missing. Hawkwind2016, yes in understand that, I cleaned that area completely and it is clean, ever after running for several mins. is there anything else near the CCT that is can a leak oil. I will re take in The intake off and see if I can get a better picture and check back in here.
 
  #7  
Old 02-24-2018, 02:12 PM
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fortunately for me, the local motorsport start had the bolt and washer needed for the CCT. However, I am concerned about it. do I need to apply any kind of thread locker or maybe some kind of sealant on the washer?
 
  #8  
Old 02-24-2018, 02:36 PM
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No. The washer is a sealing type, or should be.
No thread lock either. Just make sure it's tightened to spec.
 
  #9  
Old 02-24-2018, 03:58 PM
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well eveything is back together. time for a test ride!
 
  #10  
Old 02-24-2018, 06:24 PM
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Good luck. Hopefully your leak was that simple of a fix.

What part of the county are you in? I'm south by the 74.
 

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