Bruce, 3 things - coolant leak, bad rad cap, or bad thermostat. I've seen many miatas come with overheating problems and all sorts of theories. It's best to start with the obvious before going to the exotic ideas.
Seeing more original radiators start with small cracks in the middle or leaks around the end tanks; not enough to leave a trail on the ground. It turns out there is a small coolant leak and coolant gets low, overheating, cap blows, vicious cycle...I'm always surprised how many people don't know to fill the radiator itself, they fill the overflow tank. Rad cap can do a similar, gets weak and blows off coolant, eventually low coolant...then overheating... When it's cool enough to take the cap off, you can see the water flow in the radiator, pump is working. Ross On Apr 10, 2011, at 8:43 PM, Bruce Labitt wrote: > Both! > > Timing belt was done at 60K. I didn't do it myself. I'll try to search my > records if the water pump was done too. (I hope it was...) > > When I put the car away in the fall I noticed some gurgling at shutdown. No > overheating then. I did replace the radiator cap then, hoping that would > address the issue. > > Arghh, sounding more like a water pump. FWIW, car was immediately shutdown > after the first geyser! Still idles well... > > -Bruce > > On 4/10/2011 8:32 PM, bill zimmerman wrote: _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
