380SL (107.045) V8-3.8L (116.960) (1982)
7.
Install block heater into engine block using a new rubber O-ring supplied in kit (B, Figure 2) on vehicles produced since October 1980, or
using a new aluminum seal ring (A, Figure 2) on vehicles produced prior to October 1980. Torque to 70 N-m (52 lb. ft.) using a 46 mm
(113/16") wrench or socket.
NOTE:
When using the rubber O-ring, coat the block heater threads with M-B engine sealer, part no. 001 989 47 20, prior to installation.
8.
Reinstall engine block drain plug using a new seal ring. Close radiator drain.
9.
Reinstall engine support arm.
NOTE:
A slight realignment of the motor mount heat shield may be necessary on some vehicles.
10.
Reinstall oil filter mounting base and filter using a new gasket.
11.
Attach power cable to block heater and route along suitable supports on the right side so that it ends in front of the radiator. Tie the cable with
plastic straps to the supports as required.
CAUTION! Be sure power cable is away from exhaust manifold, otherwise cable may be damaged.
12.
After checking coolant for sufficient antifreeze protection, refill cooling system and pressure test for leaks.
13.
Reconnect battery cable, run engine with defroster on, check for coolant leaks. Check for proper heater operation and coolant level.
Parts Information
Part Name
Part Number
Block heater kit
901 203 00 95
Time Allowance
Applicable to
20-0950 51
Block heater, subsequent installation
2.5 hours
380 SE
20-0950 52
Block heater, subsequent installation
2.5 hours
380 SEL
20-0950 53
Block heater, subsequent installation
2.5 hours
380 SEC
20-0950 54
Block heater, subsequent installation
2.5 hours
500 SEL
20-0950 55
Block heater, subsequent installation
2.5 hours
500 SEC
20-0950 11
Block heater, subsequent installation
2.5 hours
380 SL
Models 123 (Except 123.123) and 126.120 Engine Type 617.95
Subject
SUBSEQUENT INSTALLATION OF
No.
153
ENGINE BLOCK HEATER MODELS 123 (EXCEPT 123.123) AND 126.120 ENGINE TYPE 617.95 (TURBODIESEL)
Date
November, 1984
File Ref.
20
Group
FIGURE 1
1.
Disconnect battery ground cable.
2.
Remove air filter housing, disconnect mounting bracket and move rearward.
3.
Drain coolant from radiator and engine block into container for reuse.