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

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

) 1. Undo the bolts (1a) and remove the oil pump cover (1b).2. Remove the drive gear.3. Remove the driven gear.4. Undo plug (4a) and remove oil pressure relief valve (4b).5. Remove the crankshaft front oil seal.

Reassembling ( Dismantling

) Check that the radial clearance between pump casing and driven gear is within the recommended limits; If not, replace the oil pump assembly

	Measurement		Value
-	Radial clearance between pump casing and driven gear (mm)		0.080 - 0.186

Check that the clearance between the oil pump cover support plane and the upper side of the gears is within the recommended limits; If not, replace the oil pump assembly

	Measurement		Value
-	Clearance between pump cover support surface and top of gears (mm)		0.025 - 0.070

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)		35
	at test load (daN)	11.73 - 12.51

Fit the oil pressure relief valve in its seat and tighten the cap.Refit the driven gear.Refit the drive gear.Place the engine oil pump cover back in its housing and secure using the bolts.

Manually rotate the gears to check that they turn without sticking.