Chevrolet 89060444 Pump Asm,Oil

If you don't already have it out of the way, take off the oil pan and position a large drain pan underneath the engine. Remove the bolts of the pump on its position with the rear main bearing cap and then lower the pump and extension shaft down off the engine. Before installation of the pump, the extension shaft of the pump should be rotated and oil poured into the pick-up while the pump is primed with engine oil. Bolt the pump, extension shaft and retainer to the main bearing cap and position the dowel pin end of the pump so that it fits the dowel pins at the bottom and top of the oil pump so that the top end of the extension shaft fits into the lower end of the oil pump drive and slips well into place. Bolt on the pump mounting bolt and torque the same, and then bolt on the oil pan and fill up the oil.

Take an adequate drain pan beneath the engine; unbolt the pump cover from the force balancer assembly and drop the pump; this action also takes out the gears from the balancer housing. To install, eject petroleum jelly on the outer part of the gear through the cavities to prime it, then fix the oil pump at the force balancer assembly, with the top end of the drive shaft to be slotted into the lower end of the oil pump. Finally the pump mounting bolts are tightened to the required torque then the oil pan is fitted and oil added.

The oil pump drive gear and driven gear should be checked for wear and damage.

Remove the oil pan.

The first step is to unbolt the oil pan.

Note any identification marks on the rotors and withdraw them from the pump body, marking them if necessary for correct reinstallation.

Install the oil pump cover and screws, tightening them by hand until snug, then gradually and evenly to the specified torque.

Ensure that the oil pump screen is parallel with the oil pan rails for proper fitting into the oil pan.

If needed, extract the pick-up screen and pipe assembly from the pump body.

Install the oil filter and check the oil level with the dipstick.

Ensure the filter by-pass valve is flat and free of nicks, cracks, warping, or scratches.

Clean these components with solvent, dry them thoroughly, and inspect for any obvious damage, including checking the bolt holes for damaged threads and the splined surfaces on the crankshaft sprocket for any apparent damage.

If the pump is found defective in any of the checks, replace it with a new one and do not reuse the original or attempt to rebuild it.

After lifting out the cover and oil pump gears as an assembly, clean the parts with solvent and dry them with compressed air if available.

Inspect the ends of the oil pump driveshaft and the plastic collar that retains it; if there are signs of wear or if the collar is cracked or missing, replace the shaft with a new one.

Lower the pump from the engine.