Here in Central Valley CA predicted 107 deg today with 100 deg every day through July 14 (then 109 deg on July 15). Will get lots of Engine Coolant System Testing done using Ron Davis Radiators next couple weeks in what I would call extreme Ambient Temperatures
Got Engine Coolant temperatures up to 220 deg F yesterday in 100 deg ambient racing around (No Traffic) and in traffic (idling in traffic and 100 mph on Test Road) and at higher rpms without paying attention to what I call (conservation of Engine Coolant Temperatures). Engine Coolant Temperatures quickly dropped over 15 deg once I collected myself and this with AC Full On (fan speed 10). The Engine Coolant Temperatures actually dropped a bit just idling in traffic after I was done fooling around
You may think 220 deg F is HOT but in a Stock Radiator Fan System, the Radiator Fans would not even come on yet (My Radiator Fans were ON with Haibeck Chip and 180 deg Thermostat)
If you are NOT looking at Digital Engine Coolant Temperatures using the HVAC System, the Temperature Gauge needle is a tad under half or at half at Engine Coolant Temperatures around 200 deg F and a tad over half at Engine Coolant Temperatures around 220 deg F. Each Engine Coolant Temperature Gauge will be just a tad different.
HVAC Display Digital Engine Coolant Temperatures in Deg C.......
Push/hold up and down buttons each side of Fan Speed Center Button until you get 00.
Then push Fan Speed Control Button UP to right of Fan Speed Center Button until you get to 16.
Then Push Center Fan Speed Button to Read Engine Coolant Temperatures in Deg C.
Approximate C to F
85 C is 185 F
93 C is 200 F
100 C is 212 F
104 C is 220 F
110 C is 230 F
120 C HOT.....do not operate at 250 deg F (TURN AC OFF).
Also...no one has mentioned except HIB (who uses water coolant and a water wetter only) that if you do not use antifreeze mixture your coolant System could boil over at 212 deg F (a bit higher Engine Coolant Temperatures with a good radiator cap which maintains 15 psi Coolant Pressures). NOT GOOD
In regard to Loosing Coolant vice Heating Coolant to HOT temperatures. It has been said that as long as you do not loose the Coolant and the Water Pump is NOT Airlocked (
like concern for low oil level in oil pan but as long as you have oil pressure) you will NOT destroy the LT5 Engine
