Laser FWD L4-1997cc 2.0L DOHC Turbo (1993)
Thermal Vacuum Valve: Description and Operation
Thermo Valve Location
Purpose
To provide control over EGR operation based on coolant temperature.
Location
Located on the thermostat housing,
Construction
The valve, is a thermo-wax type.
Operation
As the engine temperature rises above a preset point, a wax element in the module expands moving a mechanical valve in the module. This closes
off the vented port (closing the valve) providing vacuum to the EGR valve.
