Thermostat- r + r
- Make
- Fiat
- Model
- Croma Factory Service Manual
- Year
- 2005–2010
- Section
- Engine cooling › Thermostat- r + r
THERMOSTAT- R + R
Removing
- Position the vehicle on a lift.
- Make sure that the ignition key is in the OFF position, then disconnect the battery terminal (-).
| Description | Connector | |
|---|---|---|
| Battery | See A001 BATTERY |
1. Remove the soundproof cover secured to the engine by three pins.
1. Undo the coolant drain plug on the coolant pump and drain the coolant.
Collect the coolant in a suitable container.
1. Disconnect the electrical connection from the engine coolant temperature sensor.
| Description | Connector | |
|---|---|---|
| 1 | Engine coolant temperature sensor/sender unit | See K036 ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT |
2. Loosen the collar and disconnect the upper coolant input sleeve to the radiator, thermostat side.
3. Undo the bolts (3a) and remove the thermostat cover (3b).
4. Remove thermostat (4a) and sealing ring (4b).
Refitting
1. Clean the sealing surfaces, then fit the thermostat (1a) with a new sealing ring (1b).
Spread the sealing ring with silicone grease (white).
2. Place the thermostat cover (2a) in its housing and secure it by tightening the bolts (2b) to the recommended torque.
| Component | Fastening | dia | Value (daNm) | Validity |
|---|---|---|---|---|
| Thermostat unit cover | Bolt | M6 x 1 | (thermostat unit side) 0.8 | 2.2 |
3. Connect the upper coolant input sleeve to the radiator, thermostat side, and tighten the band.
4. Connect the electrical connection to the engine coolant temperature sensor.
1. Tighten the coolant drain plug on the coolant pump to the specified torque.
Apply silicone paste to the plug before fitting.
| Component | Fastening | dia | Value (daNm) | Validity |
|---|---|---|---|---|
| Drain plug on water pump | M20 x 1.5 | (water pump side) 2.0 | 2.2 |
- Refit the soundproofing cover in its seat and secure to the engine with the three pins.
- Connect the negative battery terminal.
Op. 0010T20 ENGINE COOLANT - CHANGE
- Remove the vehicle from the lift.
Removing
- Position the vehicle on a lift.
Op. 1016A10 SOUND-PROOFING COVER - R.R
Op. 5530B52 BATTERY SUPPORT/DRIP TRAY - R.R
Op. 7055B54 UNDER ENGINE PROTECTION/GUARD - R.R.
Op. 1048B25 INTERMEDIATE RIGID PIPE BETWEEN HEAT EXCHANGER AND THROTTLE BODY - R R
Op. 1048B26 HOSE FROM INTERMEDIATE PIPE TO PIPE ON THROTTLE CASING - R.R.
1. Undo the radiator coolant drain plug.
Collect the coolant in a suitable container.
1. Loosen the band and disconnect the radiator upper coolant inlet hose, thermostat side.
2. Undo the nut fixing the engine coolant return pipe from the engine oil heat exchanger.
3. Loosen the band and disconnect the coolant delivery pipe to the climate control system heater, thermostat side.
4. Loosen the band and disconnect the coolant supply pipe to the engine oil heat exchanger, thermostat side.
5. Disconnect the electrical connection from the engine coolant temperature sensor.
| Description | Connector | |
|---|---|---|
| 5 | Engine coolant temperature sensor/sender unit | See K036 ENGINE COOLANT TEMPERATURE SENSOR/SENDER UNIT |
1. Disconnect the rapid connector for the vacuum intake pipe from the vacuum pump.
2. Loosen the band and disconnect the engine oil vapour recovery pipe from the engine oil filler.
3. Loosen the band and disconnect the flexible pipe from the rigid coolant return pipe to the engine coolant reservoir.
1. Undo the bolts (1a) and remove the thermostat (1b) complete with O-ring (1c).
Refitting
1. Place the thermostat (1a) in its housing with the O-ring (1b) and secure it by tightening the bolts (1c) to the recommended torque.
| Component | Fastening | dia | Value (daNm) | Validity |
|---|---|---|---|---|
| Thermostat | Bolt | M8 | (cylinder head side) 2.5 | 1.9 JTD 16v 2.4 JTD 20v |
| Component | Fastening | dia | Value (daNm) | Validity |
|---|---|---|---|---|
| Thermostat | Bolt | M8 | (cylinder head side) 2.3 - 2.8 | 1.9 JTD 8v |
- Connect the flexible pipe to the rigid coolant return pipe to the engine coolant reservoir and tighten the band.
- Connect the engine oil vapour recovery pipe to the engine oil filler and tighten the band.
- Connect the rapid connector for the vacuum intake pipe to the vacuum pump.
- Connect the electrical connection to the engine coolant temperature sensor.
- Connect the coolant supply pipe to the engine oil heat exchanger, thermostat side, and tighten the band.
- Connect the coolant delivery pipe to the climate control system heater, thermostat side, and tighten the band.
- Tighten the nut fixing the engine coolant return pipe from the engine oil heat exchanger.
- Connect the radiator upper coolant inlet hose, thermostat side, and tighten the band.
- Tighten the coolant drain plug to the radiator.
Op. 1048B26 HOSE FROM INTERMEDIATE PIPE TO PIPE ON THROTTLE CASING - R.R.
Op. 1048B25 INTERMEDIATE RIGID PIPE BETWEEN HEAT EXCHANGER AND THROTTLE BODY - R R
Op. 5530B52 BATTERY SUPPORT/DRIP TRAY - R.R
Op. 0010T20 ENGINE COOLANT - CHANGE
Op. 7055B54 UNDER ENGINE PROTECTION/GUARD - R.R.
Op. 1016A10 SOUND-PROOFING COVER - R.R
- Remove the vehicle from the lift.
Removing
Op. 0010T20 ENGINE COOLANT - CHANGE
1. Loosen the nut fixing the wiring mounting bracket to the thermostat.
2. Disconnect the electrical connection for the thermostat temperature regulator.
3. Loosen the band and disconnect the water supply hose to the radiator from the thermostat.
4. Undo the bolts and remove the thermostat complete with O-ring from the support.
Refitting
- Place the thermostat in its housing complete with a new O-ring and secure it to the support using the bolts.
- Connect the radiator water supply hose to the thermostat and tighten the band.
- Connect the electrical connection for the thermostat temperature regulator.
- Tighten the nut fixing the wiring mounting bracket to the thermostat.
Parts & tools for this job For 2005 Fiat Croma
- FLUIDCoolantSearch: Fiat coolant antifreeze
- PARTThermostatSearch: Fiat Croma 2005 thermostat
- TOOLCooling system pressure testerSearch: cooling system pressure tester
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