seen water pump impeller rotted away do this.
original on my 89 with 350k on it.as load increased so did temp.it was subtle but i knew something was failing.and the fan made its normal roar.
radiator was nearly new and i keep it clean.that waterpump didnt owe me anything so i shotgunned it.the volume of coolant returning to the fitting from the heater cores under the cap doubled!and when i tore it down it was so far gone it was hard to believe it kept its cool at all!
original on my 89 with 350k on it.as load increased so did temp.it was subtle but i knew something was failing.and the fan made its normal roar.
radiator was nearly new and i keep it clean.that waterpump didnt owe me anything so i shotgunned it.the volume of coolant returning to the fitting from the heater cores under the cap doubled!and when i tore it down it was so far gone it was hard to believe it kept its cool at all!