3315367 - 1084B18 engine oil pump, removed - check at bench (Automatic transmission)

Position the engine oil pump in a vice fitted with projective jaws.1. Fit the tool.

NameCountry
1Counter-torque/Template1.870.799.000
2. Undo the (left) bolt (2a) and remove the oil pump drive chain assembly (2b).Remove the tool.

NameCountry
-Counter-torque/Template1.870.799.000
1. Undo the bolts (1a) and remove the oil pump cover (1b).2. Remove the driven gear.3. Remove the drive gear.4. Undo the plug (4a) and remove the oil pressure relief valve (4b).Remove the crankshaft front oil seal.
Check the wear of the oil pump drive chain and, if necessary, replace it.Check that the radial clearance between driven gear and pump casing is within the recommended limits; if this is not the case, replace the engine oil pump.

MeasurementValue
-Radial clearance between gears and pump casing (mm)0.110 - 0.180
Check that the axial clearance between the upper side of the gears and the oil pump cover support plane is within the recommended limits; if this is not the case, replace the engine oil pump.

MeasurementValue
-End float between upper side of gears and pump cover support surface (mm)0.016 - 0.086
Check that the height of the spring for the engine oil pressure relief valve is within the recommended limits; if this is not the case, replace the spring.

MeasurementValue
-Engine oil pressure limiting valve spring height (mm)11.96 - 12.76

MeasurementValue
-Height released (mm)49.5
Fit the engine oil pressure relief valve and tighten the nut.

FasteningComponentØValue(daNm)
-NutOIL PRESSURE LIMITING VALVE-1.6 ÷ 2.0
Fit the drive gear.Fit the driven gear.Fit the oil pump cover and tighten the bolts to the recommended torque.

FasteningComponentØValue(daNm)
-BoltOIL/COOLANT PUMP DRIVESHAFT SEAL-0.8 ÷ 1.2
Manually rotate the gears to check that they turn without sticking.
Position the engine oil pump in a vice fitted with projective jaws.1. Fit the tool.

NameCountry
1Counter-torque/Template1.870.799.000
2. Fit the oil pump drive chain assembly (2a) and tighten the (left) bolt (2c) to the recommended torque.

FasteningComponentØValue(daNm)
2cLeft hand thread boltOIL PUMP GEARSM104.5 ÷ 5.5