Accessories - Engine Heater Retrofitting
Date: February 2005Order No.: P-I-20.00/30
Supersedes:
Group: 20
SUBJECT:
MODEL 211.026 Engine OM 648 (CDI)
Retrofit of the engine coolant preheater
Warning!
To help protect against the possibility of personal injury please note following.
Do not open the cooling system unless the coolant temperature is well below 90°C (194°F).
Open the cap slowly to allow the pressure to release. Hot fluid/steam from hot cooling system may cause severe burns.
Do not pour coolant into drink containers or containers used for other purposes.
Wear protective gloves, protective clothes, and eye protection.
Any waste coolant must be disposed of properly.
Note:
Special Tools W124 589 24 21 00 and W124 589 00 91 00 as shown are required and should already be in your Special Tool Inventory.
1. Remove lower engine covers and noise encapsulation (See WIS: AR94.30-P-5300T).
2. Drain coolant from radiator. Drain coolant from engine block by removing drain plug on the left side of engine block (See WIS: AR20.00-P-1142HB).
3. Unscrew the freeze plug (1 Figure 1, 2) located on the right rear side of the engine block using an appropriated 6-point socket.
Note:
Make sure that the freeze plug area is clean and the thread is not damaged.
Installation
Note:
General notes on coolant Preheater (WIS: AH20.00-P-1001-01A)
4. Ensure that the rubber 0-ring (2, Figure 1) is properly seating at the base of the coolant preheater (3, Figure 1, 3).
5. Screw coolant preheater (3, Figure 1, 3) into the engine block using 46 mm socket and torque to specification.
Note:
Tightening torque: 70 Nm
6. Plug in the insulated electric cord (4, Figure 4) onto the coolant preheater (3, Figure 1, 3).
7. Screw on and tighten the insulated electric cord cap into the coolant preheater (3, Figure 1, 3).
8. Route the insulated electric cord (4, Figure 4) from the coolant preheater (3, Figure 1, 3) up and along the engine oil dipstick to the top of the engine compartment. Route the cord next to the right wheelhousing area, as shown on Figure 4. Secure the cord with straps and rest the plug end (5, Figure 4) next to the hydraulic unit.
Note:
Tie the preheater cord away from the exhaust or other hot surfaces in the engine compartment. Make sure the connector (5, Figure 4) is easily reachable. Loop and secure the cord (4, Figure 4) as necessary next to the hydraulic unit. Please advise the customer of the location of the connector and explain that a proper three-prong electrical extension cord must be used when plugging the coolant preheater into an electrical outlet.
Further advise the customer not to attempt to start the engine when the coolant preheater is plugged into electrical outlet and to make sure that the coolant preheater electrical cord is kept away from any moving or high heated parts.
9. Close coolant drain plug.
Note:
Tightening torque: 30 Nm
10. Test coolant for sufficient antifreeze protection, refill and bleed cooling system.
11. Inspect cooling system for leaks (See WIS: AR20.00-P-1010HA)
12. Reinstall the lower engine covers and the noise encapsulation.
Estimated Labor Time
Note:
This installation, and any subsequent related installation and/or workmanship issues, cannot be claimed under warranty.
Parts Information
In Case of Warranty, use the table.