Hello,
I know someone will inevitably post a thread that already contains useful info, but I've done some serious searching as it is, yet the internet is a large place and I have specific questions.
Onward. I have a 2007 KLR that runs hot, it is a newly acquired bike and sat for some time before I bought it. In getting it road ready I bled the cooling system from the drain bolt below the water pump and replaced the coolant. I then had to go to work and did not burp the system.
Here we are now and I did burp the system by removing the rad cap and running the bike up to where the temp gauge reads 3/4, which as of right now seems to be its normal idling temp. While I was running the bike I was watching the rad let out some bubbles, especially when the throttle was open, not a lot of bubbles. After about 30 seconds of this, the coolant would spill up and over the radiator from where it was sitting at just full. I would turn the bike off and watch the coolant bob up and down and finally settle. I would then repeat the process and see some bubbles, throttle, coolant overflow, turn bike off, bobbing coolant.
The bike sits at 3/4 temp and it gets there really fast, has first gen thermo bob FYI. MY question: Is the overflow of the coolant concerning and are small occasional bubbles when throttling indicative of a) a lot of air bubbles because I wasn't thorough with my coolant change procedure or b) indicative of a failing gasket, head, water pump seals, etc? There are no other signs of milky oil, white smoke or drinking coolant.
Wes. Thanks.
I know someone will inevitably post a thread that already contains useful info, but I've done some serious searching as it is, yet the internet is a large place and I have specific questions.
Onward. I have a 2007 KLR that runs hot, it is a newly acquired bike and sat for some time before I bought it. In getting it road ready I bled the cooling system from the drain bolt below the water pump and replaced the coolant. I then had to go to work and did not burp the system.
Here we are now and I did burp the system by removing the rad cap and running the bike up to where the temp gauge reads 3/4, which as of right now seems to be its normal idling temp. While I was running the bike I was watching the rad let out some bubbles, especially when the throttle was open, not a lot of bubbles. After about 30 seconds of this, the coolant would spill up and over the radiator from where it was sitting at just full. I would turn the bike off and watch the coolant bob up and down and finally settle. I would then repeat the process and see some bubbles, throttle, coolant overflow, turn bike off, bobbing coolant.
The bike sits at 3/4 temp and it gets there really fast, has first gen thermo bob FYI. MY question: Is the overflow of the coolant concerning and are small occasional bubbles when throttling indicative of a) a lot of air bubbles because I wasn't thorough with my coolant change procedure or b) indicative of a failing gasket, head, water pump seals, etc? There are no other signs of milky oil, white smoke or drinking coolant.
Wes. Thanks.