Engine oil pump, removed - check at bench
- Make
- Fiat
- Model
- 500 Factory Service Manual
- Year
- 2007–2024
- Section
- Engine lubrication › Engine oil pump, removed - check at bench
ENGINE OIL PUMP, REMOVED - CHECK AT BENCH
Removing
1. Undo the bolts (1a) and remove the intake (1b).
2. Remove the seal.
3. Undo the bolts (3a) and remove the oil pump cover (3b).
Use a percussion screwdriver to undo these bolts.
4. Remove the driven gear.
5. Remove the drive gear.
- Remove the crankshaft front oil seal
Refitting
1. Check that the radial clearance between the driven gear and the pump casing is within the recommended limits.
| Measurement | Value | Validity |
|---|---|---|
| Radial clearance between pump casing and driven gear (mm) | 0.080 ÷ 0.186 | 1.2 8V |
- Check that the height of the oil pressure relief valve spring is within the recommended values.
| Measurement | Value | Validity |
|---|---|---|
| Height of relief valve spring (valve opening) with test load of 8 - 8.8 daN (mm) | 55.0 | 1.2 8V |
| Measurement | Value | Validity |
|---|---|---|
| Height of engine oil pressure relief valve spring (valve completely open) with test load of 13.2 daN (mm) | 47.575 | 1.2 8V |
| Measurement | Value | Validity |
|---|---|---|
| Length of engine oil pressure limit valve spring (mm) | 77.396 | 1.2 8V |
- Fit the drive gear.
- Fit the driven gear.
- Fit the oil pump cover
Manually rotate the gears to check that they turn without sticking.
- Fit the engine oil intake complete with O-Ring and secure it using the bolts.
The crankshaft front oil should be fitted with the engine oil pump fitted on the crankcase.
Removing
1. Undo the cap (1a) and remove the oil pressure relief valve (1b).
2. Undo the bolts (2a) and remove the engine oil intake duct (2b) complete with gasket (2c).
1. Undo the bolts (1a) and remove the oil pump cover (1b).
2. Remove the drive gear.
3. Remove the driven gear.
1. Remove the crankshaft front oil seal.
Refitting
- Check that the radial clearance between the driven gear and the pump casing is within the recommended limits; if this is not the case, replace the oil pump assembly.
| Measurement | Value | Validity |
|---|---|---|
| Radial clearance between pump casing and driven gear (mm) | 0.1÷ 0.23 | 1.3 Mjet |
- Check that the axial clearance between the pump cover support plane and the top of the gears is within the recommended values; if this is not the case, replace the oil pump assembly.
| Measurement | Value | Validity |
|---|---|---|
| Endfloat between the pump casing support plane and the top of the gears (mm) | 0.025 ÷ 0.075 | 1.3 Mjet |
- Check that the height of the oil pressure relief valve spring is within the recommended values; if not, replace the spring.
| Measurement | Value | Validity |
|---|---|---|
| Height of engine oil pressure relief valve spring with test load of 5.44 - 6.02 daN (mm) | 36.0 | 1.3 Mjet |
1. Fit the crankshaft front oil seal (1a) using the tool (1b).
| Tool | Description | Function | Validity |
|---|---|---|---|
| 1.860.878.000 | Fitting tool | Fitting crankshaft front oil seal | 1.3 Mjet |
- Place the driven gear in position.
- Place the drive gear in position.
- Fit the oil pump cover in its housing and tighten the bolts.
Manually rotate the gears to check that they turn without sticking.
- Position the intake duct complete with gasket in its housing and secure it using the bolts.
- Place the oil pressure relief valve in position and tighten the cap.
Removing
1. Undo the bolts (1a) and remove the intake (1b).
2. Remove the seal.
3. Undo the bolts (3a) and remove the oil pump cover (3b).
4. Remove the driven gear.
5. Remove the drive gear.
6. Undo the cap (6a) and release the oil pressure relief valve (6b).
- Remove the crankshaft front oil seal
Refitting
1. Check that the radial clearance between the driven gear and the pump casing is within the recommended limits.
| Measurement | Value | Validity |
|---|---|---|
| Radial clearance between driven gear and pump casing (mm) | 0.100 ÷ 0.210 | 1.4 16v |
1. Check that the endfloat between the top of the gears and the oil pump cover support plane is within the recommended values.
| Measurement | Value | Validity |
|---|---|---|
| Endfloat between the pump casing support plane and the top of the gears (mm) | 0.025 ÷ 0.070 | 1.4 16v 1.9 Multijet |
- Check that the height of the pressure relief valve spring is within the recommended values.
| Measurement | Value | Validity |
|---|---|---|
| Height of engine oil pressure limit valve spring under load of 11.73 - 12.51 daN (mm) | 35.0 | 1.4 16v |
- Place the oil pressure relief valve in position and secure it using the cap.
- Place the drive gear and the driven gear in position.
- Place the oil pump cover in position and secure it by tightening the bolts to the recommended torque.
Manually rotate the gears to check that they do not stick.
- Position the intake duct complete with gasket in its housing and secure it using the bolts.
Parts & tools for this job For 2007 Fiat 500
- PARTEngine gasket setSearch: Fiat 500 2007 engine gasket set
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