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  1. #1
    Saab Nut
    Join Date
    02 Aug 2010
    Posts
    336
    Thumbs Up:   9

    Cooling system - Saab 9-5

    4-cylinder engine

    Cooling System Diagram

    Name:  01 Saab 9-5 cooling system.gif
Views: 15692
Size:  11.2 KB

    1. Radiator
    2. Coolant reservoir
    3. Coolant pump
    4. Engine
    5. Thermostat housing
    6. Heat exchanger, cabin
    7. Throttle body
    8. Turbocharger
    9. Oil cooler (aut. only)
    10. Engine temperature sensor
    11. Shut-off valve
    12. Radiator fan


    Brief description
    Name:  03 Saab 9-5 cooling system.gif
Views: 17175
Size:  15.2 KB
    The cooling system is of the pressurized type with cross-flow radiator and expansion tank.

    The water pump is on the right-hand side of the engine and driven by the crankshaft pulley via a multigroove belt. The thermostat is placed in a housing on the left-hand side of the engine.

    The expansion tank is mounted in the engine bay on the left-hand side. It is connected to the coolant pump and the upper right-hand part of the radiator. The purpose of the latter connection is to vent the cooling system. The fluid in the expansion tank does form part of the circulation fluid.

    The car is fitted with an electric radiator fan mounted behind the radiator. The fan has either one or two motors, each with two speeds: low and high. Cars without A/C have one fan motor while cars with A/C have two fan motors.

    Coolant flow

    Name:  05 Saab 9-5 cooling system.gif
Views: 14026
Size:  15.0 KB

    Thermostat closed

    From the coolant pump - via a passage into the engine block up through the cylinder head through the thermostat housing's lower outlet through the hose to the heat exchanger through the return hose from the heat exchanger back to the pump.

    With the thermostat normally open (1)

    From the coolant pump via a passage into the engine block - up through the cylinder head through the thermostat housing's upper outlet (past the thermostat) through the radiator back to the pump.

    A small quantity of coolant passes through the thermostat's lower outlet to the heat exchanger and back to the coolant pump.

    With the thermostat fully open (2)

    The thermostat closes the lower passage through the thermostat housing thus forcing the full flow of coolant through the radiator.

    Radiator fans download: Radiator fans - Saab 9-5 4-cylinder.pdf

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  2. #2
    Saab Nut
    Join Date
    02 Aug 2010
    Posts
    336
    Thumbs Up:   9
    V6 engine

    Cooling System Diagram

    Name:  02 Saab 9-5 cooling system.gif
Views: 14295
Size:  10.0 KB

    1. Coolant pump
    2. Engine
    3. Thermostat
    4. Radiator
    5. Heat exchanger, cabin
    6. Expansion tank
    7. Electric pump
    8. Oil cooler
    9. Throttle body
    10. Shut-off valve
    11. Turbo
    12. Radiator fan

    Brief description

    Name:  04 Saab 9-5 cooling system.gif
Views: 16018
Size:  18.2 KB
    The cooling system is of the pressurized type with cross-flow radiator and expansion tank.

    The coolant pump and thermostat are located on the right-hand side of the engine. The coolant pump is driven by the crankshaft pulley via multigroove belt.

    The expansion tank is mounted in the engine bay on the left-hand side. It is connected to the coolant pump, throttle valve and upper left-hand part of the radiator. Its connection to the throttle valve is for preheating while the purpose of the last-mentioned connection is to vent the cooling system. The fluid in the expansion tank does not form part of the circulation of fluid.

    The car is fitted with an electric radiator fan mounted behind the radiator. The fan has two motors, each with two speeds: low and high.

    Coolant flow

    Name:  06 Saab 9-5 cooling system.gif
Views: 14166
Size:  15.8 KB

    Thermostat closed

    From the coolant pump - via a passage into the engine block - up through the cylinder heads - through the thermostat housing's lower outlet - through the hose to the heat exchanger - through the return hose from the heat exchanger - back to the pump.

    From the coolant pump - via a passage into the engine block - up through the cylinder heads - via the bypass passage - back to the pump.

    Important
    Do not mix up the coolant hoses. Connections: A - Expansion tank, B - Cut-off valve, C - Heat exchanger.

    Name:  07 Saab 9-5 cooling system.gif
Views: 13397
Size:  15.8 KB

    With the thermostat normally open

    From the coolant pump - via a passage into the engine block - up through the cylinder heads - through the thermostat housing's upper outlet (past the thermostat) - through the radiator - back to the pump.

    A small quantity of coolant passes through the thermostat's lower outlet to the heat exchanger and back to the coolant pump.

    With the thermostat fully open

    The thermostat closes the lower passage through the thermostat housing thus forcing the full flow of coolant through the radiator.

    Radiator fans download: Radiator fans - Saab 9-5 V6.pdf

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  3. #3
    Saab Fan
    Join Date
    11 Feb 2013
    Location
    south Dakota
    Posts
    7
    Saab(s)
    99 9-5
    Thumbs Up:   0

    Re: Cooling system - Saab 9-5

    Thanks for this!


    Sent from my SCH-I535 using Tapatalk 2

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  4. #4
    Saab Fan
    Join Date
    23 Nov 2014
    Location
    North dakota
    Posts
    8
    Saab(s)
    2005 9-5 aero
    Thumbs Up:   0
    Need part number or guidance for coolant hose that goes from block to heat exchanger, any help? 2005 9-5 2.3 HOT aero

    0 Not allowed!

 

 

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