Question 1

How to disconnect the cable from the negative battery terminal and remove the oil pan in V8 engine on Pontiac Firebird?

Accepted Answer

Disconnect the cable from the negative battery terminal. On carbureted and TBI models, remove the air cleaner assembly, while on TPI models, remove the air intake duct. Remove the distributor cap to prevent damage when the engine is raised. Unbolt and remove the top half of the fan shroud, then raise the vehicle and support it on jack-stands. Drain the engine oil and disconnect the exhaust crossover pipe at the exhaust manifold flanges, lowering the exhaust pipes and suspending them from the frame with wire. If equipped with an automatic transmission, remove the converter shroud; if equipped with a manual transmission, remove the flywheel cover. Remove the starter, then turn the bolt at the center of the vibration damper to rotate the crankshaft until the timing mark is facing down at the 6 o'clock position, moving the forward crankshaft throw to the top for clearance at the front of the oil pan. Remove the throughbolt at each engine mount, then raise the engine slightly to allow the oil pan to clear the crossmember, preferably using an engine hoist with lifting chains. Alternatively, place a floor jack and a block of wood under the oil pan, ensuring the wood block spreads the load to prevent damage. Raise the engine slowly until wood blocks can be placed between the frame front crossmember and the engine block, checking clearances around the engine, especially at the distributor and cooling fan. Lower the engine onto the wood blocks, ensuring it is firmly supported, and if a hoist is used, keep the lifting chains secured. Remove the oil pan bolts, noting the different sizes and their locations, then remove the oil pan. Before reinstalling, ensure the sealing surfaces on the pan, block, and front cover are clean, removing any old gasket material if the original oil pan is being reused. Always use new gaskets and seals when installing the pan, lifting it into position and installing all bolts finger tight, tightening the end bolts first and then the remaining bolts from the center out to the ends. Lower the engine onto the mounts and install the throughbolts, then follow the removal steps in reverse order, filling the crankcase with the correct grade and quantity of oil, starting the engine, and checking for leaks.

Question 2

How to remove and install an Oil Pan in four cylinder engine on Pontiac Fiero?

Accepted Answer

To remove the engine, first disconnect the cable from the negative battery terminal and raise the vehicle securely on jackstands. Drain the engine oil, then remove the front engine mount nuts, which are secured with large nuts and washers. Next, take off the catalytic converter splash shield and the strut rod. Remove the alternator along with its bracket bolts and the remaining engine support bracket bolt, followed by the air conditioning compressor bracket bolts. Then, take out the starter and the flywheel dust cover. Using a hoist, raise the engine and support bracket/front mount assembly slightly off the cradle, and remove the forward bolts of the engine front support bracket. The mount and support bracket can be removed as an assembly by pushing them upward until the mount studs clear the cradle. After that, remove the oil pan retaining bolts and the oil pan itself. For installation, clean the mating surfaces of the oil pan and cylinder block, apply a 1/8-inch wide bead of RTV sealant to the oil pan flange, and install the oil pan, tightening the retaining bolts to the specified torque. Install the engine front support bracket and tighten the mounting bolts, then lower the engine until the front support bracket rests on the cradle, ensuring the engine mount studs protrude through the holes. Tighten the engine mount nuts, install the flywheel dust cover and the starter, followed by the air conditioning compressor bracket and the alternator. Reattach the catalytic converter splash shield, lower the vehicle, add engine oil, and finally install the negative battery cable. Start the engine and check for leaks.

Question 3

How to remove and reinstall the oil pan in 2.3L four cylinder (Quad-4) engine on Pontiac Grand Prix?

Accepted Answer

The procedure below presumes the engine is in situ in the car; if the engine has been Hankered, Remove bolts and disengage the oil sump from the block. Start with the removal of the negative battery terminal and then draining the oil and if the Theftlock audio system lockout is relevant it must be switched off. Disconnect the lower bellhousing cover, and take out the lower splash shield. For all models with manual transaxle, first remove exhaust manifold brace, second remove the radiator outlet pipe bolt to the oil pan. Subsequent to that, for manual transaxle equipped models, use the 7 mm socket to unscrew the transaxle-to-oil pan nut and stud, then carefully push the spacer out above the oil pan and transaxle, followed by unscrewing the oil pan-to-transaxle bolt, in addition to the oil pan mounting bolts. In a gradual manner it is recommended to pull pan from the block with out prying on the block and pan seal or gasket area but attention should be made to the crankshaft which may have to be turned for clearance. If it is necessary to remove the crankshaft or to work with other parts of lower ends P-Plate and oil pan baffle need to be removed They are fasten on four bolts. For installation clean seizure areas, with lacquer thinner or acetone, the bolt holes in the block should be free from debris. Closely examine the condition of the gasket, and replace it if it has been damaged using silicone sealant as noted above for minor surface irregularities which may be present but avoid overuse of the sealant because it will cause the alignment to be off and the later may cause oil leakages. If the oil pan baffle was removed, reinstall it, put the gasket in place, put the pan in contact with the block, and tighten the bolts enough that you can use your fingers. As far as it concerns the bolts, these have to be tightened in three steps to the torque indicated, starting from the middle of the pan and moving clockwise in circles, and it must be said that the bolts have different torque values. Last but not least complete the remaining step beginning from step 7 again and refill the engine with oil before starting the engine and in the final; scan the oil pan for oil leaks only after the engine has begun to run.

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