I recently converted the 261 I got over to the short water pump with adapter and the wide groove harmonic balancer, so all pulleys are for the wide belt. Other than a couple small spots, I did not notice any significant coolant leakage after initial fire up and running of the engine. I went to my first show a couple weekends ago and on my drive home. I did encounter a traffic back up and got into stop and go traffic for about 10 to 15 minutes and the temperature gradually rose to just under the red line, I’m guessing that’s around 200°? As soon as I got out of that, it cooled right down. After parking the truck for the night, I did notice some coolant leakage. Upon running it at idle, I noticed the overflow tube would puke out a stream of water. When revving it up above idle, the stream would stop. no water in the oil or coming out of the exhaust. Might I have exhaust gas leaking into the coolant possibly .or could this setup just not be enough RPM related to water pump speed with this adapter plate to flow the water properly. Any suggestions on this issue would be greatly appreciated.
