Genuine 1987 Pontiac Fiero Oil Pump

1987 Pontiac Fiero Parts Questions & Experts Answers

• Q: How to remove and install the oil pump on 1987 Pontiac Fiero?

  A: In order to replace the oil pump for four cylinder, it is necessary to initially take off the oil pan After that, you should unscrew the two flange mounting bolts and the nut from the main bearing cap bolt and pump as well as the screen. Then you need to fit a pump and a screen; make sure the pump shaft is parallel with the driveshaft tang while sliding to the lower bushing; if this does not work out, adjust the 'drive slot' so that the pump can slide over them. Torque the pump bolts to the required level and replace the oil pan. First for the V6 engine, set down the oil pan and draw out the pump and the driveshaft extension out as well. Screw on the oil pump and the driveshaft extension into the distributor driveshaft gear, the pump to the rear bearing cap bolt, tighten to the torque recommended before putting the oil pan back with the bolts tightened to the recommended torque. Oil all engines and for all engines check the oil level and the oil pressure and look for any sign of leakage. During the disassembly process, the residual oil should be drained from the internal chamber of the pump and the driveshaft as well as the extension should be removed; also, the pump cover and the gears should also be removed; in addition, the pressure regulator valve retaining pin and a spring should also be removed, but care should be taken when handling the spring as it releases pressure. If the valve is stuck, soaked the pump housing in carburetor cleaning solvent, and clean all the parts of the pump. The pump parts should be checked for foreign material, cracks, scoring and wear; the idler gear and shaft should fit tightly in the housing of the pump; any of the above mentioned should warrant the replacement of the pump assembly. Make sure suction pipe and screen assembly are loose and free, examine the gears for signs of wear or damage and measure gear-clash and the depth, diameter and side clearance of gears and replace the pump, if it is out of the specifications. When reassembling the pump apply engine oil to all internal parts, place the gears of the pump with their indications towards the cover, and fill all the cavities with petroleum jelly for easy priming. Place the pump cover, pressure regulator valve and spring and tighten the cover bolts in accordance to the prescribed torque. Before reinstalling the oil pan must be clean, as well as an oil pressure sending unit must be removed to fit a pressure gauge. Switch on the engine and observe the oil pressure if the suction pipe is not well anchored the oil pressure should rise quickly if it fails to do so then dismantle the oil pump, fill the cavities with petroleum jelly and then put the pump back to avoid causing harm to the engine.