Oil Pump: Inspection

WARNING: This page is about a different car, the 1995 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.

Place straightedge across mounting surface of oil pump cover. Measure warpage between oil pump cover and straightedge. Replace oil pump or cover if warpage exceeds specification. Refer to the OIL PUMP SPECIFICATIONS table.
Measure gear thickness and gear pocket depth in pump body. Check gear side clearance by measuring from tip of gear to pump housing. Measure gear diameter and gear pocket diameter in front cover. Replace components if measurements are not within specification. See OIL PUMP SPECIFICATIONS table.
Check relief valve tension and relief valve-to-bore clearance. Replace components if measurements are not within specification. See OIL PUMP SPECIFICATIONS table.

OIL PUMP SPECIFICATIONS

Application

In. (mm)

Driver Shaft-To-Housing Clearance

.0015-.0030 (.038-.076)

Idler Shaft-To-Gear Clearance

.0005-.0017 (.013-.043)

Oil Pump Cover Warpage

.0016 (.041)

Oil Pump Gear Backlash

.008-.012 (.20-.30)

Oil Pump Gear Height ⁽¹⁾

.0005-.0055 (.013-.140)

Oil Pump Gear Radial Clearance

.002-.005 (.05-.13)

Relief Valve-To-Bore Clearance

.0017-.0029 (.043-.074)

Relief Valve Spring Tension ⁽²⁾

15.2-17.1 @ 1.20 (6.9-7.8 @ 28.2)

⁽¹⁾	Measure amount gear is recessed in housing

⁽²⁾	Lbs. @ In. (Kg @ mm).