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ENGINE APPLICATION MANUAL GM Powertrain
Gasoline 4.3L V6 90 Degree Revised: 08/15/2000
File: c:\data\manuales\v6-truck\am43v6#3.doc
Contact:Luis Nespolo - (248) 857-1558 Printed: 8/15/00
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3.2.4.2 Coolant Properties
GMPT engines are liquid cooled and designed to operate with a mix of ethylene glycol and
water. GMPT recommends a daily audit of glycol to water concentration and a yearly audit of
water quality at the vehicle assembly fill station.
3.2.4.3 Coolant Radiator (Recommended Minimum Values)
Mixture Ratio 52 % Ethylene Glycol and 48 % Water By Volume
Ethylene Glycol Specifications Any Meeting GM 6277 M Specification
Water Specifications Maximum Contaminants Or Range
- Total Solids 350 PPM
- Total Hardness 150 PPM
- pH 6.9-9.0
- Calcium And Magnesium 100 PPM (COMBINED)
- Chlorides 50 PPM
- Sulfates 100 PPM
- Bicarbonates 150 PPM
3.2.4.3.1 Heater Performance
Three coolant temperature performance exist in support of heater performance for the
purpose of providing adequate cab heat. These temperatures shall be selected through
the thermostat setting.
3.2.4.3.1.1 Fast Warm-Up
The engine can provide a minimum of 170°F coolant to the heater in 10 minutes after
the engine started to run from cold conditions.
3.2.4.3.1.2 Uniform Comfort.
The engine can provide 190°F +/-5°F coolant to the heater at 20 minutes after the
engine started to run from cold conditions.
3.2.4.3.1.3 Degradation of Comfort
The engine can provide 190°F +/-5°F coolant to the heater during the 20 minutes
idle, after the engine started to run from cold conditions.
A thermostat temperature of 190°F is assumed. A higher thermostat temperature is
acceptable.
Cooling Radiator L35 UNITS
Radiator Heat Evacuation To Coolant 4460 BTU/Min
Total Average Heat Coefficient- 34 BTU/Hr-sq. ft-F
GM Recommend Better Than
Radiator Efficiency - 60%
GM Recommend Better Than
Radiator Type Crossflow
Radiator Capacity (minimum) 11.8 Liters
GM Recommend Better Than
Minimum Radiator Frontal Area TBD by Customer Sq. Meter
Radiator Total Area TBD by Customer Sq. Meter
Radiator Coolant Flow GPM
@ Rated Power
Radiator Coolant Peak Pressure 103 kPa
Thermostat Open 170 F
Thermostat Fully Open 190 F
Radiator Coolant Inlet Location & Size Top/ 46.2 mm
Radiator Coolant Outlet Location & Size Bottom/ 60.0 mm
Fan Engine Driven
1:25 Ratio to Crank