GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Engine

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OIL LEVEL CHECK



See Figures 1 through 5

Every time you stop for fuel, check the engine oil making sure the engine has fully warmed and the vehicle is parked on a level surface. Because it takes some time for the oil to drain back to the oil pan, you should wait a few minutes before checking your oil. If you are doing this at a fuel stop, first fill the fuel tank, then open the hood and check the oil, but don't get so carried away as to forget to pay for the fuel. Most station attendants won't believe that you forgot.

  1. Make sure the car is parked on level ground.
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  3. When checking the oil level, it is best for the engine to be at normal operating temperature, although checking the oil immediately after stopping will lead to a false reading. Wait a few minutes after turning OFF the engine to allow the oil to drain back into the crankcase.
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  5. Open the hood and locate the dipstick which will be in a guide tube mounted in the upper engine block. Pull the dipstick from its tube, wipe it clean (using a clean, lint free rag) and then reinsert it.
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Fig. Fig. 1: Open the hood and locate the dipstick



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Fig. Fig. 2: Wipe the dipstick with a clean, lint free rag, then reinsert it in the tube

  1. Pull the dipstick out again and, holding it horizontally, read the oil level. The oil should be between the FULL and ADD marks on the dipstick. The the oil is below the ADD mark, add oil of the proper viscosity through the capped opening in the top of the valve cover. See the oil and fuel recommendations listed earlier in this section for the proper viscosity and rating of oil to use.
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Fig. Fig. 3: The oil should be within the crosshatched area of the dipstick



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Fig. Fig. 4: If the oil level is low, remove the fill cap...



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Fig. Fig. 5: ... then add the correct amount of oil through the opening in the valve cover

  1. Insert the dipstick and check the oil level again after adding any oil. Approximately one quart of oil will raise the level from the ADD mark to the FULL mark. Be sure not to overfill the crankcase and waste the oil. Excess oil will generally be consumed at an accelerated rate.
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WARNING
DO NOT overfill the crankcase. It may result in oil-fouled spark plugs, oil leaks cause by oil seal failure or engine damage due to oil foaming.

  1. Close the hood.
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OIL AND FILTER CHANGE



See Figures 6 through 12

5600 km) under normal conditions; more frequently under severe conditions such as when the average trip is less than 4 miles (6 km), the engine is operated for extended periods at idle or low-speed, when towing a trailer or operating is dusty areas.

In addition, we recommend that the filter be replaced EVERY time the oil is changed.

Please be considerate of the environment. Dispose of waste oil properly by taking it to a service station, municipal facility or recycling center.

  1. Run the engine until it reaches normal operating temperature. The turn the engine OFF .
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  3. Raise and safely support the front of the vehicle using jackstands.
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  5. Slide a drainPan of at least 5 quarts capacity under the oil pan. Wipe the drainPlug and surrounding area clean using an old rag.
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Fig. Fig. 6: Loosen the drainPlug using a proper sized wrench

  1. Loosen the drainPlug using a ratchet, short extension and socket, or a box-wrench. Turn the plug out by hand, using a rag to shield your fingers from the hot oil. By keeping an inward pressure on the plug as you unscrew it, oil won't escape past the threads and you can remove it without being burned by hot oil.
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  3. Quickly withdraw the plug and move your hands out of the way, but be careful not to drop the plug into the drainPan, as fishing it out can be an unpleasant mess. Allow the oil to drain completely, then reinstall the drainPlug (except on 2.5L engines). Do not overtighten the plug.
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Fig. Fig. 7: Quickly withdraw the plug and move your hands out of the way



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Fig. Fig. 8: Allow the oil to completely drain from the pan, then reinstall the drainPlug

  1. Move the drainPan under the oil filter. Use a strap-type or cap-type wrench to loosen the oil filter. Cover your hand with a rag, and spin the filter OFF by hand; turn it slowly. Keep in mind that it's holding about one quart of dirty, hot oil.
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  3. On some vehicles such as the 2.5L Lumina engine, the oil filter is mounted inside the engine. The filter on these engines is serviced through the oil pan drainPlug. To remove the oil filter on the 2.5L engines:
    1. After removing the drainPlug and completely draining the oil, slowly turn the filter to begin removal, then pull it downward.
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    3. Remove the filter, using pliers at the tab, then remove and discard the O-ring if it is stuck to the housing.
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Fig. Fig. 9: Use a strap-type or cap-type wrench to loosen the oil filter

Be careful when removing the oil filter, because the filter contains about 1 quart of hot, dirty oil.

  1. Empty the old oil filter into the drainPan, then properly dispose of the filter.
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  3. Using a clean shop towel, wipe OFF the filter adapter on the engine block. Be sure the towel does not leave any lint which could clog an oil passage.
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  5. For all vehicles except the 2.5L, coat the rubber gasket on the new filter with fresh oil. Spin the filter onto the adapter by hand until it contacts the mounting surface. Tighten the filter 3 / 4 to 1 full turn.
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Fig. Fig. 10: Before installing a new oil filter, lightly coat the rubber gasket with clean oil

  1. For the 2.5L engine, coat the O-ring and grommet with clean engine oil, then press the oil filter into the housing by hand. Clean the oil pan drainPlug, then coat the drainPlug gasket with clean engine oil and install the plug. Tighten the plug 1 / 4 turn after gasket contact.
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  3. If raised, carefully lower the vehicle.
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  5. Refill the crankcase with the correct amount of fresh engine oil. Please refer to the Capacities chart in this section.
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Fig. Fig. 11: Remove the oil fill cap on the valve cover to refill the crankcase with oil



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Fig. Fig. 12: Using a funnel will help prevent unnecessary mess while refilling the crankcase with fresh oil

  1. Check the oil level on the dipstick. It is normal or the level to be a bit above the full mark until the engine is run and the new filter is filled with oil. Start the engine and allow it to idle for a few minutes.
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CAUTION
Do not run the engine above idle speed until it has built up oil pressure, as indicated when the oil light goes out.

  1. Shut OFF the engine and allow the oil to flow back to the crankcase for a minute, then recheck the oil level. Check around the filter and drainPlug for any leaks, and correct as necessary.
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When you have finished this job, you will notice that you now possess four or five quarts of dirty oil. The best thing to do is to pour it into plastic jugs, such as milk or old antifreeze containers. Then, locate a service station or automotive parts store where you can pour it into their used oil tank for recycling.

Improperly disposing of used motor oil not only pollutes the environm