I'm sure this has been discussed several times before; however, I couldn't find a close enough duplicate. Rebuilt engine (around 1990 but not started until recently), radiator flushed by radiator shop but not roded, warm to the touch throughout after running, thermostat checked and operating as advertised (185*), pressure cap new from Moss, 4 psi. After about 200 miles and a 50 mile road trip engine overheated while idling (to the extent it blew coolant through cap). Allowed it to cool, replaced lost coolant and started the 50 mile return home. The engine continued to run hot, around 190* - 200* when moving but overheated again when caught in town traffic. Allowed to cool again, replaced coolant and made it home. Pulled into garage with temp indicating around 200*. When shut off engine temperature went to peg and blew coolant. The next day, started engine, allowed temp to reach about 190*, shut off engine and same thing happened.
Now, after all that, my question is: Where should I go to determine the cause and obtain a solution? I would prefer to not have to remove the radiator since I just got the car on the road and have only about 250 miles on it. But, of course, if I have to I'll do it. Everything was normal for the first 200 miles.
Now, after all that, my question is: Where should I go to determine the cause and obtain a solution? I would prefer to not have to remove the radiator since I just got the car on the road and have only about 250 miles on it. But, of course, if I have to I'll do it. Everything was normal for the first 200 miles.