Coolant Shut-Off Valve -N82-, Removing And Installing: Installing

Install In Reverse Order Of Removal. Note The Following: 

The coolant flow direction is marked on the Coolant Shut-Off Valve -N82-.

-- Be sure the coolant hoses are connected correctly to the Coolant Shut-Off Valve -N82-.

-- Interchanged coolant hoses can result in failure of the passenger compartment heater due to the incorrect flow direction of the coolant.

-- Coolant hoses that are bent cannot allow enough coolant to flow causing the passenger compartment heating to fail.

-- Check the coolant level and bleed the coolant system. Refer to COOLANT [For engine(s) CGRA] .

Function 

• The Coolant Shut-Off Valve -N82- is activated via the A/C system controls only at certain settings (for example, when "OFF" is selected or when maximum cooling is required). The engine RPM must be below 5000 and the coolant temperature must be below 95 °C (203 °F).
• Shutting off the coolant circuit to the A/C heat exchanger accelerates the engine warming up when the coolant is cold.
• The Coolant Shut-Off Valve -N82- is open without activation. To be able to check the electrical function of the valve, activation occurs at certain intervals (for example, brief activation lasting approximately 1 second at every twentieth engine start).

Incorporation Into The Coolant Circuit 

Fig 1: Coolant Shut-Off Valve -N82- Components

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

1. Coolant Shut-Off Valve -N82-

   -- Coolant Shut-Off Valve -N82- function. Refer to COOLANT SHUT-OFF VALVE -N82-, REMOVING AND INSTALLING .

   -- Removing and installing. Refer to COOLANT SHUT-OFF VALVE -N82-, REMOVING AND INSTALLING .

2. Return - From the Second Rear Heater Core to the Engine
3. Supply - From the Front Heater Core to the Rear 2nd Heater Core
4. Return - from the Front Heater Core to the Engine
5. Supply - From the Engine to the Coolant Shut-Off Valve -N82-