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volvo Workshop Repair Guides


V70 GL L5-2.4L VIN 55 B5254S (1998)

Engine, Cooling and Exhaust > Cooling System > Thermostat, Engine Cooling > Component Information > Specifications > Page 2352

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Thermostat: Testing and Inspection

NOTE:  

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Drain off about two liters of coolant. Remove expansion tank cap. 

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Open nipple on left underside of radiator, use hose to collect coolant. Close nipple.

Thermostat Replacement 

1. Removal/installation thermostat:

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Remove thermostat housing cover hose and remove thermostat and gasket (Torx 40).

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Clean thermostat housing gasket surfaces.

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Install new thermostat seal.

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Install thermostat in housing, install and tighten cover and hose.

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Fill with coolant and run engine warm until the thermostat opens. Top up if necessary.

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Check for leaks.

Thermostat Check 

2. Check opening function:

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Thermostat can be tested in hot water.

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Maximum opening should occur within two minutes in water at opening temperature.

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Marking: 87 

Starts to open at: 87°C (189°F)  
Fully open at: 102°C (216°F) 

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Marking: 90

Starts to open at: 90°C (194°F) 
Fully open at: 105°C (221°F) 

Engine, Cooling and Exhaust > Cooling System > Thermostat, Engine Cooling > Component Information > Specifications > Page 2352

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