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Old 01-07-2018, 02:31 PM   #15
Gregski
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Join Date: Aug 2014
Location: Sacramento, CA
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Re: 71 350 running hot coolant backup up problem

all good thoughts, thank you

Quote:
Originally Posted by bautino95 View Post
Maybe the engine is bored out .060?
highly unlikely as it was bought as a crate replacement engine from Chevrolet, but you never know

Quote:
Originally Posted by bautino95 View Post
bad temp sender or gauge? is it an electric sender or mechanical? where is it it installed?
brand new digital Intellitronix gauges from Summit as well as brand new electronic temp sending unit, I know even new can be off, I will try to somehow test them or verify them with another gauge set, water temp sending unit installed in driver side cylinder head between the #1 and #3 cylinders

Quote:
Originally Posted by bautino95 View Post
You can drill a 1/16 hole in you T-stat. I took it a step farther and drilled two and my 400 never gets above 180* on a hot day.
I assume you are running a 180 thermostat, I am running a brand new 195 Duralast thermostat from AutoZone just for this reason it comes pre drilled with a hole in it and I really like it, works great in my other cars.
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