LeSharo coolant circuit description

The 85 and 86 2.2 vehicles use a big bunch of special hoses which change sizes at various rubber outlets cast in as part of the hose assembly, thus the direction of flow is determined by the pre-cast hoses.  

The cooled coolant from the lower radiator outlet flows first to the transmission oil cooler and the oil filter cooler/adapter down from the battery location then flows to the engine block at the water pump inlet. 
The water pump distributes the coolant inside the block, picking up heat.  
The heated coolant builds heat until the thermostat in the thermostat housing opens at approximately 195 F to return to the radiator for cooling.
Hot coolant also leaves the block at a fitting on the right side of the cylinder head near the firewall and is routed to: 

1) The cab heater on the firewall, the flow of which returns through a Y fitting ---one branch going to the lower hose from the radiator and the water pump. 
The other branch goes to the coolant reservoir on the firewall to dissipate air bubbles 

2) To the hose and metal line going to the MotorAid Heater and the coach auto heater located below the clothes closet.   
This coolant is returned through tube and hose to the large hose from the cooled water radiator outlet going to the water pump.

The Y fitting installed in the hose returning from the cab heater allows the coolant to enter the water reservoir, which acts as a collector for any air in the coolant.  
There is also a hose attached from the reservoir to the nipple on the water pump that collects aerated coolant at that point.  
The reservoir line through the Y fitting allows the reservoir to maintain system capacity of approximately 10 quarts plus the coolant in the lines and heat exchangers in the MotorAid and coach heater. 

During the filling of the reservoir, open the bleed valve on the heater body near the drivers side hood hinge to allow trapped air to escape.  

After filling, start the engine and with the valve open, observe the flow from the valve. 
When it stops bubbling, close the valve. Do not over tighten this valve. 

It is necessary to have front wheels of the vehicle on ramps to insure that trapped air from the coach auto heater and the Motor Aid heater can fill and bleed properly.

Another important note:

The plastic top or cap on the plastic water reservoir (AKA expansion tank) is the pressure cap.  
It will release radiator pressure at spec; 17.5 psi.  
If coolant passes through the cap, as during an overheat that exceeds the opening pressure of the valve,---- it MUST be changed. as it will not reset.
 
Long winded but I think I covered everything. Larry Schoppe   (AKA LS)