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MBE 4000 Cooling System Overview

ADDITIONAL INFORMATION

Specifications

This section contains the specifications for servicing the engine. ‪

The coolant specifications are listed in Table . Listed in Table are the cooling system capacity figures. The coolant mixing ratio is listed in Table . ‪

Type of Coolant ‪

Requirement ‪

Fully -Formulated Ethylene Glycol* ‪

TMC RP-329 Type "A" ‪

Water plus Corrosion Inhibitors ‪

Temperature must not fall below 32F (0C) ‪

Coolant Specifications

Description

Capacity in liters (Quarts)

Engine Coolant Capacity (all vehicles ‪

Engine capacity* ‪

30.0 (31.7) ‪

Century Class and Columbia Cooling System Capacity ‪

Total capacity ‪

57.4 (60.7) ‪

Antifreeze quantity at 50 percent ‪

28.7 (30.4) ‪

Antifreeze quantity at 55 percent ‪

31.6 (33.4) ‪

Sterling A-Line and L-Line Cooling System Capacity ‪

Total capacity ‪

53.8 (56.8) ‪

Antifreeze quantity at 50 percent ‪

26.9 (28.4) ‪

Antifreeze quantity at 55 percent ‪

29.6 (31.3) ‪

FL112 Cooling System Capacity ‪

Total capacity ‪

42.0 (44.4) ‪

Antifreeze quantity at 50 percent ‪

21.0 (22.2) ‪

Antifreeze quantity at 55 percent ‪

23.1 (24.4) ‪

Cooling System Capacity


Antifreeze Protection Down to F (C)

Water Percentage by Volume

Corrosion-Inhibiting Antifreeze Percentage by Volume

-34 (-37) ‪

50 ‪

50 ‪

-49 (-45) ‪

40 ‪

Maximum 60 ‪

Coolant Mixing Ratio

The torque values for the cooling system are listed in Table . The wear dimensions for the coolant pump assembly are listed in Table . Listed in Table is the critical dimension for the coolant pump assembly. ‪

Fastener ‪

Torque Value, mm (in.) ‪

Coolant Pump Inlet Pipe Mounting Bolts ‪

50 (37) ‪

Coolant Pump Mounting Bolts ‪

30 (22) ‪

Coolant Pump Pulley Mounting Bolts ‪

25 (18) ‪

Front Idler and Tensioner Support Mounting Bolts ‪

60 (44) ‪

Thermostat Housing Mounting Bolts ‪

25 (18) ‪

Cooling System Torque Values

Description ‪

Dimensions, mm (in.) ‪

Drive Shaft Diameter (at the hub) ‪

25.048 - 25.061 ‪

(0.9861 - 0.9867) ‪

Hub Inside Diameter ‪

24.995 - 25.008 ‪

(0.9841 - 0.9846) ‪

Bearing Outside Diameter ‪

54.981 - 54.994 ‪

(2.1646 - 2.1651) ‪

Bearing Housing Diameter ‪

54.930 - 54.960 ‪

(2.1626 - 2.1638) ‪

Drive Shaft Diameter (at the impeller) ‪

15.045 - 15.056 ‪

(0.5923 - 0.5928) ‪

Impeller Inside Diameter ‪

15.000 - 15.018 ‪

(0.5906 - 0.5913) ‪

Impeller Outside Diameter ‪

124 - 125 ‪

(4.88 - 4.92) ‪

Impeller - Maximum Out-of-Round ‪

0.15 (0.0059) ‪

Coolant Pump Assembly Wear Dimensions

Dimension ‪

Description ‪

mm (in.) ‪

A ‪

Gap between the Impeller and the Coolant Pump Housing ‪

0.6 - 1.0 ‪

(0.023 - 0.039) ‪

Critical Dimension for Coolant Pump Assembly

The thermostat test values are listed in Table . ‪

Description

Temperature

Distance mm (inch)

Main Valve Starts To Open ‪

177 to 185F (81 to 85C) ‪

Main Valve Fully Open ‪

203F (95C) ‪

Main Valve Minimum Lift ‪

8 mm (0.3 inch) ‪

Short Circuit Valve Fully Closed ‪

198F (92C) ‪

Short Circuit Valve Minimum Lift ‪

6 to 7.5 mm (0.24 to 0.295 inch) ‪

Thermostat Test Values

The sensor torque value is listed in Table . ‪

Description ‪

Torque, Nm (lbft) ‪

Coolant Temperature Sensor to the Engine Block ‪

30 (22) ‪

Torque Value