Model 190D (W 201) Engine Type 601.921
Subject SUBSEQUENT INSTALLATION OF No. 156ENGINE BLOCK HEATER MODEL 190D (W 201) ENGINE TYPE 601.921
Date November, 1984
File Ref.
Group 20
FIGURE 1 - RADIATOR DRAIN HOSE (FRONT ENCAPSULATION PANEL REMOVED FOR CLARITY):
1. Disconnect battery negative cable.
2. Slide a hose (12 mm I.D., 1500 mm long) through the hole (on right side, next to drain valve) in the encapsulation panel (Figure 1), attach to the radiator drain outlet and drain coolant into container for reuse.
FIGURE 2 - ARROW - DRAIN VALVE:
NOTE: The drain valve is accessible through the towing eye flap at the right, below the bumper (Figure 2, arrow).
3. Raise the vehicle on lift and remove the rear encapsulation panel, below the engine compartment.
FIGURE 3 - 6 CORE PLUG:
4. Remove the rear core plug (6, Figure 3) from the right side of the engine (behind exhaust manifold) with a 22 mm sixpoint socket.
5. Install block heater into engine block with new O-ring supplied in kit. Torque to 70 N-m (52 lb. ft.) using a 46 mm (1-13/16") socket.
FIGURE 4 A CABLE BRACKET B ENGINE BLOCK HEATER:
6. Attach power cable to block heater. Route cable away from exhaust manifold through insulated cable bracket (b, Figure 4).
NOTE: Attach insulated cable clamp (8 mm (5/16") bolt hole or Part No. 916016 006202) to the bottom rear engine support bolts.
FIGURE 5 - ROUTING OF POWER CABLE:
7. Continue routing the cable along the air cooling duct (1) of alternator, the bracket below auxiliary water pump (2) and A/T off cooler line (3) at radiator, with plastic straps (Figure 5).
W.I. #156 Grp.20
8. Close radiator drain, check coolant for sufficient anti-freeze protection, refill cooling system and pressure test for leaks.
9. Connect battery negative cable.
10. Reinstall encapsulation panel below engine compartment.
11. Run engine with defroster on. Check for leaks, proper heater operation and coolant level.
Parts Information
Part Name Part Number
Block heater kit 901 203 00 95
Insulated cable clamp 916016 006202
Time Allowance Applicable to
20-0950 42 Block heater, subsequent installation 1.2 hours 190 D - 2.2
W.I. #156 Grp.20