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TSB 07-04-94 Service Manual Revision

  Cooling System     7 - 34

Fig. 53 Generator Mounting Bracket Bolts - Diesel

    (9) Position the generator to gain access to thermostat housing and housing bolts.
    (10) Remove thermostat housing mounting bolts.
    (11) Remove the thermostat housing, thermostat, inner and outer seals and lift bracket (Fig. 52).
    (12) Clean the mating surfaces of the thermostat housing and the cylinder head.

     (1) Install the outer seal (Figs. 52 or 54) into the machined shoulder on the thermostat housing.
     (2) Install the thermostat into the machined shoulder next to the outer seal. Note direction of thermostat in figures 52 and 54.
     (3) Position the inner thermostat seal with the shoulder towards the thermostat housing (Fig. 54).
(4) install thermostat, lift bracket, seals and housing

Fig. 54 Thermostat Seals - 5.9L Diesel - Typical

to the engine as an assembly. Install and tighten mounting bolts to to 24 Nm (18 ft. lbs.) torque.
    (5) Position generator to thermostat housing. Install and tighten mounting bolt to 24 N-m torque. Tighten pivot bolt to 43 N-m (32 ft.lbs.) torque.
     (6) Install the check valve hose and hose clamp at thermostat housing (Fig. 52).
     (7) Install accessory drive belt. Refer to Belt Removal / Installation in the Engine Accessory Drive Belt section of this group.
    (8) Connect negative battery cables to both batteries.
    (9)Fill cooling system and check for leaks. Refer to Refilling Cooling System in this group.


General Information
 The cooling system is designed around the coolant. Coolant flows through, the engine water jacket absorbing heat produced during engine operation. The coolant carries the heat to radiator and heater core. Here it is transferred to the ambient air passing through the radiator and heater core fins. The coolant also removes heat from the automatic transmission fluid in vehicles equipped with an automatic transmission.

Coolant Performance

    The required ethylene-glycol (antifreeze) and water mixture depends upon climate and vehicle operating conditions. The coolant performance of various mixtures follows:
    Pure Water - Water can absorb more heat than a mixture of water and ethylene-glycol. This is for purpose of heat transfer only. Water also freezes at a higher temperature and allows corrosion.

Page 7-33

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Thanks to Bob Bergevin and Barry Drodge for supplying this TSB information

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This page was edited on: May 3, 2004