300CD (123.153) L5-3.0L DSL Turbo (617.952) (1982)
Heater Control Valve: Service and Repair
Removing and Installing Monovalve
Removal
1. Drain radiator coolant.
2. Disconnect battery.
Monovalve Installed
3. Loosen both clamps on water hoses on monovalve and pull off hoses.
4. Pull electric 2 pin plug from mono valve (11).
5. Remove both fastening bolts and lift mono valve from holder.
Installation
NOTE: Prior to installation of mono valve, check grommets between mono valve and holder for damage and renew if needed.
1. Insert mono valve in holder and install both bolts.
2. Install 2 pin plug to mono valve (11).
3. Install hoses on mono valve (11) and fasten hose clamps.
4. Connect battery.
5. Refill radiator with coolant and check cooling system for leaks.
6. Function test automatic climate control. SEE Manual (Visual) Function Tests. See: Heating and Air Conditioning/Testing and
Inspection/Component Tests and General Diagnostics/Automatic Air Conditioning (Auto A/C)/Manual and Visual Function Test of Automatic
Climate Control