Grand Cherokee 4WD V8-5.7L VIN 2 (2007)
Water Pump: Description and Operation
Water Pump Bypass
WATER PUMP BYPASS
The 4.7L engine uses an internal water/coolant bypass system. The design uses galleries in the timing chain cover to circulate coolant during engine
warm-up preventing the coolant from flowing through the radiator. The thermostat uses a stub shaft located at the rear of the thermostat to control flow
through the bypass gallery.
