Engine oil pump, removed - check at bench
- Make
- Fiat
- Model
- Doblò Factory Service Manual
- Year
- 2000–2010
- Section
- Engine lubrication › Engine oil pump, removed - check at bench
Engine oil pump, removed - check at bench
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.
6. Undo the cap (6a) and release the oil pressure relief valve (6b).
1. Remove the crankshaft front oil seal using a suitable drift placed in the splining.
1. Check that the radial clearance between the driven gear and the pump casing is within the recommended limits.
| Measurement | Value | ||
|---|---|---|---|
| 1 | Radial clearance between driven gear and pump casing (mm) | 0.080 - 0.186 |
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 | ||
|---|---|---|---|
| 1 | Endfloat between top of gears and cover support plane (mm) | 0.025 - 0.056 |
Check that the height of the oil pressure relief valve spring is within the recommended values.
| Measurement | Value | ||
|---|---|---|---|
| Oil pressure relief valve spring height (mm) | 34.1 | ||
| Under test load (daN) | 4.45 - 4.94 | ||
Fit the oil pressure relief valve and secure it using the clip.
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 intake duct complete with gasket and secure it using the bolts.
The crankshaft front oil seal should be fitted with the engine oil pump fitted on the crankcase.
Removing
1. Undo the bolts fixing the engine oil intake.
2. Remove the engine oil intake.
Refitting
Secure the oil pump appropriately.
1. Measure the clearance between the pump casing (1a) and the gears (1b) and make sure it is within the recommended values.
| Measurement | Value | ||
|---|---|---|---|
| Radial clearance between pump casing and gears (mm) | 0.110 - 0.180 |
1. Check the endfloat between cover support plane (1a) and the surface of the gears (1b).
| Measurement | Value | ||
|---|---|---|---|
| Endfloat between pump support plane and gears (mm) | 0.040 - 0.106 |
Calculate the clearance between the internal diameter of the driven gear and the pump casing housing pin.
| Measurement | Value | ||
|---|---|---|---|
| Clearance between driven gears internal diameter and pump casing housing bearing (mm) | 0.015 - 0.048 |
Calculate the clearance between the diameter of the drive gear shaft and the pump casing housing.
| Measurement | Value | ||
|---|---|---|---|
| Clearance between drive gear shaft diameter and pump casing housing (mm) | 0.016 - 0.048 |
Calculate the clearance between the drive gear and the driven gear.
| Measurement | Value | ||
|---|---|---|---|
| Clearance between drive gear and driven gear (mm) | 0.30 |
Use suitable equipment to check the specifications of the relief valve spring.
| Measurement | Value | ||
|---|---|---|---|
| Relief valve spring height (mm) | 22.5 | ||
| Under a load of (daN) | 6.51 - 6.82 | ||
| Measurement | Value | ||
|---|---|---|---|
| Relief valve spring height (mm) | 21 | ||
| Under a load of (daN) | 6.92 - 7.21 | ||
If even only one of the checks carried out of the pump casing, the gears or the valve gives results that are outside of the tolerance, then the oil pump assembly must be replaced.
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 | ||
|---|---|---|---|
| Radial clearance between driven gear and pump casing (mm) | 0.1 ÷ 0.23 |
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 | ||
|---|---|---|---|
| Endfloat between the pump casing support plane and the top of the gears (mm) | 0.05 ÷ 0.075 |
Check that the height of the oil pressure relief valve spring is within the recommended values; if not, replace the spring.
| Measurement | Value | ||
|---|---|---|---|
| Height of engine oil pressure relief valve spring (mm) | 36.0 | ||
| Test load (daN) | 5.44 ÷ 6.2 | ||
1. Fit the crankshaft front oil seal (1a) using the tool (1b).
| Description | Code | |
|---|---|---|
| 1b | Fitting tool | 1.860.878.000 |
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.
1. Undo the bolts (1a) with a screwdriver and remove the oil pump cover (1b).
2. Remove the drive gear.
3. Remove the driven gear.
4. Undo the cap (4a) and remove the oil pressure relief valve (4b).
Remove the crankshaft front oil seal.
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 | ||
|---|---|---|---|
| Radial clearance between pump casing and gears (mm) | 0.080 - 0.186 |
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 | ||
|---|---|---|---|
| Radial clearance between pump casing and gear (mm) | 0.025 - 0.056 |
Check that the height of the oil pressure relief valve spring is within the recommended values; if not, replace the spring.
| Measurement | Value | ||
|---|---|---|---|
| Height (mm) | 36 | ||
| under a load of (daN) | 6.27 - 7.06 | ||
Fit the engine oil pressure relief valve and tighten the cap.
Fit the driven gear.
Fit the drive gear.
Fit the oil pump cover and tighten the bolts.
Manually rotate the gears to check that they turn without sticking.
Removing
1. Undo the bolts (1a) with a screwdriver and remove the oil pump cover (1b).
2. Remove the drive gear.
3. Remove the driven gear.
4. Undo the cap (4a) and remove the oil pressure relief valve (4b).
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 | ||
|---|---|---|---|
| Radial clearance between driven gear and pump casing (mm) | 0.080 - 0.186 |
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 | ||
|---|---|---|---|
| Endfloat between the pump cover support plane and the top of the gears (mm) | 0.025 - 0.070 |
Check that the height of the oil pressure relief valve spring is within the recommended values; if not, replace the spring.
| Measurement | Value | ||
|---|---|---|---|
| Height (mm) | 35 | ||
| under test load (daN) | 11.73 - 12.51 | ||
Fit the engine oil pressure relief valve and tighten the cap.
Fit the driven gear.
Fit the drive gear.
Fit the oil pump cover and tighten the bolts.
Manually rotate the gears to check that they turn without sticking.
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 driven gear and pump casing (mm) | 0.080 ÷ 0.186 | 1.2 8v 1.4 8v 1.9 Multijet |
- Check that the height of the oil pressure relief valve spring is within the recommended values.
| Measurement | Value | Validity |
|---|---|---|
| Height of engine oil pressure relief valve spring (valve opening) with test load of 8 - 8.8 daN (mm) | 55.0 | 1.2 8v 1.4 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 1.4 8v |
| Measurement | Value | Validity |
|---|---|---|
| Length of engine oil pressure relief valve spring (mm) | 77.396 | 1.2 8v 1.4 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.
Parts & tools for this job For 2000 Fiat Doblò
- PARTEngine gasket setSearch: Fiat Doblò 2000 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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