Premier L4-150 2.5L (1988)
Additionally, 1991-1/4 and 1992 models are equipped with Chrysler Powertrain Control Modules (SBEC II) while 1988 through early-1991 models
contain a Renix Electronic Control Unit (ECU). For model year identification, refer to the chart.
A. Install Bypass Valve (For 3.0L 6-Cylinder Engine)
1.
With the ignition off, disconnect the negative battery cable.
NOTE:
To ensure customer satisfaction, remember to record all radio settings before disconnecting the battery and to reset the electronic memory
when you have completed the service procedure.
2.
Slowly remove the coolant bottle pressure cap to relieve system pressure.
NOTE:
For 1988 MY vehicles, inspect the coolant bottle pressure cap. Replace the cap if it is not a high dome black cap (Figure 1) with stainless steel
insert inside the cap (PN 4546111).
3.
Drain approximately one half gallon of coolant from the radiator. The drain is located on the lower right rear (engine side) of the radiator.
4.
Disconnect the aerator hose from the coolant pressure bottle.
5.
Remove the hose clamps from the two heater core nipples.
6.
Remove the hoses from the heater core nipples.
NOTE:
Be careful not to break the heater core nipples. To ease removal, slit the hose and peel it away from the nipple. Do not cut the nylon nipple.