I need possible answers asap to this problem please! I was riding about 30 miles when the coolant reservoir tank literally bursted sending boiling tan colored coolant on my legs. My bike overheated. As stupidas I am, I never had my temp sensor replaced so I had absolutely no way of telling my
temp. My coolant is dripping a light yellowish tan that is extremely oily and thick. I've beem riding my bike regularly for the past 2 years, I've never ran into a problem like this. I've checked oil in te engine case and it's untouched, no discoloration. However, it is lower than usual. Oil is obviously getting into my coolant. My question is from where at? My bike has 50k miles running on the original thermostat and pump.

 

Cylinder head gasket has blown dumping oil into the coolant passages

Don't run get it fixed

Hopefully it is no more than a gasket and not a crack or something

 

Oil cooler seals most likely. The oil pressure will push oil into the coolant and overload the cooling system.

 

Is there a way I can do a diagnosis to pinpoint what exactly the problem is? I was also suspecting that it might be the oil cooler seal. I doubt the blown head gasket since bubbles do not come up when I rev the bike with the cap off. The oil leak is gradual.

 

Pull them out, take a look at them, then replace them anyway. Really cheap to do...

 

When you say pull them out, you mean pull the oil cooler seals correct? Also I also suspect that it may be the water pump seal. How do I know if my pump seals are bad?

 

Right. Just the seals. Testing that kind of stuff is difficult. The only way is to pull them out and give them a visual. But since you went to the trouble to take them out and shouldn't reuse them anyway, just replace. Same with the pump... Checking it is the same as replacing it.

 

Ok, so after taking a look at my service manual, there seems to be 2 types of O-rings. The standard O-ring, and then there is a big oval shape O-ring. Which is more likely to be the cause of the leak? Because I have access to the normal O-rings at my house. I cannot find the part #'s for the bigger gasket because the online sites seem to lack a picture reference to the part. All I see are part #'s and I'm lost.

The link to the gasket/o ring set: http://www.hondapartshouse.com/honda...Y14MV9MNOILL2A

I am looking for the o-ring in section 4-6 (Oil cooler removal/installation) It is in step #6. What is that O-ring called? Like what's the OEM Part # ?

 

The normal o rings that separate the coolant and oil.


Honda Motorcycle Parts & ATV Accessories OEM Dirt Sport Bike Scooter Cruiser Touring Parts Off Road Motorcycles ATVs Starter Motors Honda Parts Direct

 

Ok thanks. I will first drain my oil today and double check that I don't
Have any coolant in the crank case. Any precautions or pointers before I start removing the oil cooler assembly?