Coolant leak

[Black 1000]

On one of my 03's i have a coolant leak at the pipe that enters the head. Itwas small so I tried to remove and clean,grease and reinstall but now its worse. Any tricks or anyone useing some kind of sealant?

 

[grader]

my 03 had the same leak, ended up changing the o-ring, had a kit with many different sizes and used the closest one. you could try some rtv blue silicone and give it a day to set, or hit the hardware store or auto parts place with the old one to match up. order a new one from dealer just in case your fix dont work. clean both contact surfaces as they may have corrosion and use vaseline or grease for reassembly.

 

[Black 1000]

That will be tomorrows job. Thank you

 

[RX1Jim]

Grader's suggestion is right on the money. I am finding these connection points can and will be a problem. The dam tubes Yamaha used are steel and corrode right at the connection point. Make sure the top of the head and the steel tube are clean, replace the o-ring with a close match from an auot parts store. I have found a lot of scale, deposits form right where the tube goes into the aluminum head. Clean the connection point in the head with a round wire brush (shotgun cleaning brush). I believe the buildup of this scale makes a leak path past the o-ring. Apply some RTV silicone, a small amount to the tube where the o-ring bottom out (where the tube has the bump out), slide on the o-ring and put a light coat of RTV on the o-ring. Reinstall, let it set overnitght and refill the system. I have worked on a few RX-1s with leaks at these connections. Dam steel tubing will corrode away even though a good antifreeze is being used. This will provide a really good seal.

 

[Black 1000]

Thank you thats exactly what i'm going to do