Genuine 1996 Pontiac Grand Prix Oil Pump

1996 Pontiac Grand Prix Parts Questions & Experts Answers

• Q: How to remove and inspect an oil pump, and How to installation and check backlash in 2.3L four cylinder (Quad-4) engine on 1996 Pontiac Grand Prix?

  A: To remove the oil pump, first take off the oil pan, then support the oil pump while removing the mounting bolts, and lower the pump from the engine. For inspection, clean all parts thoroughly and remove the cover, visually checking for wear, cracks, and other damage, particularly on the oil pump drive gear and driven gear; replace the pump if it is defective, if the engine has high mileage, or if the engine is being rebuilt. For installation, position the pump on the engine and install the mounting bolts, tightening them to the specified torque. Check the oil pump drive gear backlash whenever the oil pump, crankshaft, or engine block is replaced by mounting a dial indicator on the engine with the indicator stem touching the oil pump driven gear; compare the backlash to the specified values and replace the oil pump if the clearance is not correct. Finally, install the oil pan (and baffle, if removed), add oil, and run the engine, checking for oil pressure and leaks.