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overheating - almost

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G

gcan

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I just finished replacing the temperature sensor, heater valve, thermostat 180 degree, and flushing the heater core. I haven't driven her yet but within 10 minutes of running, still fine tuning the rebuilt carbs, the temp is just shy of H and a small amount of water comes out the overflow tube. When I refilled the cooling system I used 3/4 of a gallon of anti freeze and also added almost a full bottle of Water Wetter.

I just checked and the old thermostat was a 160 and it stayed just over N while driving.

I"m afraid it is getting to hot to quick - any thoughts, ideas, or suggestions?

Thank you in advance
Greg
 
Go Back to the old thermostat?

That will let you see if the old snesor was reading correctly.
 
...and if you have an I/R thermometer, take before and after measurements of the block directly adjacent to the sensor input bung. There "should" be some correlation between readings, if only to show one t-stat is working differently than the other.

R.
 
Where is the 'sensor input bung'? Would aiming the i/r thermometer at the thermostat housing itself tell us the temp the thermostat was working at?
Paul
 
The temp gauge sending unit is the sensor input bung. I'd say go back to the 160-degree t'stat to quantify the sending unit first. About that 3/4 gallon of antifreeze... 50/50 mix, yes?
 
Yep 50 50 here as well. Seemed enough for Florida.
 
Doc - I will try the old T-stat but am not clear n your 50/50 question

I drained water out of the B then added 3/4 of a gallon of antifreeze. Not sure what percentage that is if that is what you are asking

Greg
 
Yes. A 50% solution is about optimum for your climate. More water or more glycol will actually be less efficient at dissipating heat. Some "antifreeze" is now sold pre-mixed, but costs as much as straight ethylene glycol. Buy it "straight" and make your own 50/50 mix, then add it to the radiator. I have had mixed results with "Water Wetter" and the other additives. Best thing is to be sure the system is in good condition. If you've an issue with overheating, have the rad cleaned/reconditioned by a shop. Should "back-flush" the block using a garden hose from the bottom rad hose. Remove the t-stat (replace housing) and "push" water thru the block 'til it runs clear (no oxide evident) from the top hose.
 
a small bottle of redline water wetter will help cooling ability too, without much affecting the "freeze temps", but if you overheating - there's got to be an underlying cause to it. One that no bandaid will permenantly fix.
 
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