1084B18 ENGINE OIL PUMP, REMOVED - CHECK AT BENCH - Alfa - 156 - eLearn

3239082 - 1084b18 engine oil pump, removed - check at bench

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

	Name	Country
1	Counter-torque/Template	1.870.799.000

2. Undo the bolt (left-hand thread) (2a) and remove the oil pump drive chain assembly (2b). Remove the tool.

	Name	Country
-	Counter-torque/Template	1.870.799.000

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.

	Measurement		Value
-	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.

	Measurement		Value
-	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.

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

	Measurement		Value
-	Height released (mm)		49.5

Fit the engine oil pressure relief valve and tighten the plug to the specified torque.

	Fastening	Component	Ø	Value(daNm)
-	Nut	OIL 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 specified torque.

	Fastening	Component	Ø	Value(daNm)
-	Bolt	OIL/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 protective jaws. 1. Fit the tool.

	Name	Country
1	Counter-torque/Template	1.870.799.000

2. Fit the oil pump drive chain assembly (2a) and tighten the bolt (left-hand thread) (2c) to the specified torque.

	Fastening	Component	Ø	Value(daNm)
2c	Left hand thread bolt	OIL PUMP GEARS	M10	4.5 ÷ 5.5