In Reply to: 61 Yr. Old Thermostat posted by Fred (Grand Lake) on February 24, 2010 at 21:02:39:
The most common reason for an N to “over heat” is over filling the radiator. Only add enough fluid to cover the core. (check out tip # 23, below as well as tips 25 & 35) It is not actually over heating; it is just spewing out the excess water.
If the radiator is not overfilled, check for low coolant, a loose fan belt (1/2" flex at the mid-point), debris in the radiator fins or a stuck thermostat. A bad water pump will usually squeak or leak.
I'd say your t-stat is fine. I've got one that is 60 years old & still worked fine when I replaced the top hose.
Finally, when is the last time you had the radiator off or flushed it out? 61 years of tap water can put a lot of rust in a block & radiator!
Posting not permitted in the forum archives.<1267063720">