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Re: 71 350 running hot coolant backup up problem - Test #3
Quote:
Originally Posted by Gregski
so here are the results of the third test drive, this one is for all of you who suggested swapping to a 180* thermostat
180 Thermostat, running 50/50 water coolant mix, still 12 degrees initial timing
as you can see we were averaging in the high 190s, here I caught it at 199* F degrees this only proves now we are masking the problem instead of fixing it, how do I know that?, well my '74 truck is running a 180* thermostat and it operates at you guessed it 180* degrees year round
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Confirm the actual temp with a temp gun or mechanical gauge instead of spending all of this money on guesses. Your new fangle gauge and sender may be off.
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