GM Metro/Sprint 1985-1993 Repair Guide

Engine

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OIL LEVEL CHECK



See Figures 1 and 2

The engine oil should be checked on a regular basis, ideally at each fuel stop. When checking the oil level, it is best that the oil be at operating temperature. Checking the level immediately after stopping will give a false reading due to oil left in the upper part of the engine. Be sure that the vehicle is resting on a level surface, allowing time for the oil to drain back into the crankcase.

  1. Open the hood and locate the dipstick. Remove it from the tube (located on right side of the engine compartment).
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  3. Wipe the dipstick with a clean rag.
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Fig. Fig. 1: The correct oil level should be between the "ADD" and "FULL" level on the dipstick



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Fig. Fig. 2: The oil level is checked with the dipstick. When checking oil level, note the color and smell of the oil. Oil that is black or has a gas smell indicates a need for engine service.

  1. Insert the dipstick fully into the tube and remove it again.
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When checking oil level, note the color and smell of the oil. Oil that is black or has a gas smell indicates a need for engine service.

  1. Hold the dipstick horizontally and read the oil level. The level should be between the FULL and ADD marks.
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  3. If the oil level is at or below the ADD mark, oil should be added as necessary. Oil is added through the capped opening on the valve cover(s) on gasoline engines. Refer to the "Engine Oil and Fuel Recommendations" in this Section for the proper viscosity oil to use.
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  5. Replace the dipstick and check the level after adding oil. Be careful not to overfill the crankcase. Approximately one quart of oil will raise the level from ADD to FULL.
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OIL AND FILTER CHANGE



See Figures 3 and 4

Engine oil should be changed every 7,500 miles. The oil change and filter replacement interval should be cut in half under conditions such as:



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Fig. Fig. 3: Oil filter location - as seen from under the vehicle.



Driving in dusty conditions.
 
Extensive or prolonged idling.
 
Extensive short trip operation in freezing temperatures (when the engine is not thoroughly warmed-up).
 
Frequent long runs at high speed and high ambient temperatures.
 

To change the oil, the vehicle should be on a level surface and the engine should be at operating temperature. This is to ensure that the foreign matter will be drained away along with the oil and not left in the engine to form sludge. You should have available a container that will hold a minimum of 8 quarts of liquid, a wrench to fit the old drain plug, a spout for pouring in new oil and a rag or two, which you will always need. If the filter is being replaced, you will also need a band wrench or filter wrench to fit the end of the filter.

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 with it is to pour it into plastic jugs, such as milk or antifreeze containers. Then, locate a service station where you can pour it into their used oil tank for recycling.


CAUTION
Pouring used motor oil into a storm drain not only pollutes the environment, it violates Federal law. Dispose of waste oil properly.

  1. Position the vehicle on a level surface, raise and support the vehicle safely. Slide a drain pan under the oil drain plug.
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  3. From under the vehicle, loosen, but do not remove the oil drain plug. Cover your hand with a rag or glove and slowly unscrew the drain plug.
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CAUTION
The engine oil will be HOT. Keep your arms, face and hands clear of the oil as it drains out.

  1. Remove the plug and let the oil drain into the pan. Do not drop the plug into the drain pan.
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Fig. Fig. 4: Adding engine oil through the filler hole in the rocker cover.

  1. When all of the oil has drained, clean off the drain plug and reinstall it into pan. Torque the drain plug to 26 ft.lb. (35 Nm).
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  3. Using an oil filter wrench, loosen the oil filter.
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  5. Cover your hand with a rag and spin the filter off by hand; turn it slowly.
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  7. Coat the rubber gasket on a new filter with a light film of clean engine oil. Screw the filter onto the mounting stud and tighten it according to the directions on the filter (usually hand-tight one turn past the point where the gasket contacts the mounting base); DO NOT overtighten the filter.
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  9. Refill the engine with the specified amount of clean engine oil.
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  11. Run the engine for several minutes, checking for leaks. Check the level of the oil and add oil if necessary.
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