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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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3.2.4.3.3 Coolant Operating Temperatures
This engine has been validated for continuous duty including continuous operation at
WOT with the coolant temperature under thermostat control (see thermostat start to
open and full open temperatures). Limited operation above thermostat full open
temperature is allowed as shown in the table below.
3.2.4.3.4 Flow Rates
Flow to the radiator and heater vary with pump speed, thermostat valve position, and
pressure drop across the heat exchangers.
OPERATION MAX ALLOWABLE TEMP
Extended Idle (Up To 30 Minutes) In Ambient up to >38 C 262.4 F
City Traffic Operation In Ambient
- Up To 109.4 F 237.2 F
- Up To 118.4 F 255.2 F
Grades
- Trucks At GCW, 7.2% Grade, 100 F, Ambient 250 F
- Passenger Cars At GVW, 7.2% Grade, 100 F , Ambient 250 F
High Speed Operation
- Passenger Cars At GVW, 167 kph, Up To 48 C Ambient 237 F
Soaks Following Grade Operation 262 F
Figure: 3.2.4.3.4 - I - Water Pump Flow Rates
RPM L35 Condition
All Applications
Coolant Flow
GPM
2000 32.5 Road Load
2800 46.1 Road Load
3600 59.9 Road Load
1600 26.1 7.2% Grade
2400 37.7 7.2% Grade
2000 32.6 WOT
3000 49.5 WOT
4000 66.6 WOT
4200 70.1 WOT
4400 73.6 WOT
4600 76.5 WOT
750 12.1 Idling
1300 21.2 Parked
2200 36.0 Parked