Chevrolet Full-size Cars 1968-1978 Repair Guide

Engine

Print

OIL LEVEL CHECK





Click image to see an enlarged view

Fig. Fig. 1 When installing the dipstick, be careful not to bend it



Click image to see an enlarged view

Fig. Fig. 2 It usually takes about one quart of oil to bring the level from ADD to FULL



Click image to see an enlarged view

Fig. Fig. 3 To check the engine oil level, pull the dipstick out of the dipstick tube



Click image to see an enlarged view

Fig. Fig. 4 Wipe the dipstick off, then reinsert it and remove it again. The level should read FULL, if not ...



Click image to see an enlarged view

Fig. Fig. 5 ... remove the oil fill cap from the valve cover, and using a funnel ...



Click image to see an enlarged view

Fig. Fig. 6 ... add the proper amount of oil to bring the reading on the dipstick to the FULL mark

Every time you stop for fuel, check the engine oil as follows:

  1. Make sure the car is parked on level ground.
  2.  
  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.
  4.  
  5. Open the hood and locate the dipstick which will be on either the right or left side depending upon your particular engine. Pull the dipstick from its tube, wipe it clean and then reinsert it.
  6.  
  7. 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. If the oil is below the ADD mark, add oil of the proper viscosity through the capped opening in the top of the cylinder head cover. See the Oil and Fuel Recommendations chart in this information for the proper viscosity and rating of oil to use.
  8.  
  9. Replace the dipstick and check the oil level again after adding any oil. Be careful not to over fill the crankcase. Approximately one quart of oil will raise the level from the ADD mark to the FULL mark. Excess oil will generally be consumed at an accelerated rate.
  10.  

OIL & FILTER CHANGE





Click image to see an enlarged view

Fig. Fig. 7 After positioning a drain pan under the engine oil pan, loosen the engine oil drain bolt



Click image to see an enlarged view

Fig. Fig. 8 By keeping an inward pressure on the plug as you unscrew it, oil won't escape past the threads



Click image to see an enlarged view

Fig. Fig. 9 Remove the bolt to allow the oil to drain into the pan



Click image to see an enlarged view

Fig. Fig. 10 Using a oil filter wrench loosen the oil filter by turning it counterclockwise, then remove the filter



Click image to see an enlarged view

Fig. Fig. 11 Before installing a new oil filter, lightly coat the rubber gasket with clean oil



Click image to see an enlarged view

Fig. Fig. 12 Install the new filter by hand

The oil should be changed every four months or 6,000 miles on all 1968-74 cars. On 1975-78 cars, the interval is six months or 7,500 miles. Make sure that you change the oil based on whichever interval comes first.

Chevrolet recommends changing the filter at every other oil change. WE recommend a new filter with EVERY oil change, you could only benefit from this practice.

The oil drain plug is located on the bottom of the oil pan (bottom of the engine, underneath the car). The oil filter is located on the right side of the inline 6-cylinder engine and on the left side of all other engines.

The mileage figures given are the Chevrolet recommended intervals assuming normal driving and conditions. If your car is used under dusty, polluted or off-road conditions, change the oil and filter more often than specified. The same goes for cars driven in stop-and-go traffic or only for short distances at a time. Always drain the engine oil after the engine has been running long enough to bring it up to normal operating temperature. Hot oil will flow easier and more contaminants will be removed along with the oil than if it were drained cold. To change the oil and filter:

  1. Run the engine until it reaches normal operating temperature.
  2.  
  3. Raise and support the car safely.
  4.  
  5. Slide a drain pan of at least 6 quarts capacity under the oil pan.
  6.  
  7. Loosen the drain plug. Turn the plug out by hand. 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.
  8.  
  9. Allow the oil to drain completely and then install the drain plug. Don't overtighten the plug, or you'll be buying a new pan or a trick replacement plug for stripped threads.
  10.  
  11. Using a strap wrench, remove the oil filter. Keep in mind that it's holding about one quart of dirty, hot oil.
  12.  

an environmental tip. Used engine oil contains heavy metals, and has been determined to be hazardous to the environment. Recycling engine oil is the best way for disposal. Recycle whenever possible.

  1. Empty the old filter into the drain pan and dispose of the filter.
  2.  
  3. Using a clean rag, wipe off the filter adapter on the engine block. Be sure that the rag doesn't leave any lint which could clog an oil passage.
  4.  
  5. Coat the rubber gasket on the filter with fresh oil. Spin it onto the engine by hand; when the gasket touches the adapter surface, give it another 1 / 2 - 1 / 3 turn. No more, or you'll squash the gasket and it will leak.
  6.  
  7. Refill the engine with the correct amount of fresh oil. See the Capacities chart.
  8.  
  9. Check the oil level on the dipstick. It is normal for the level to be a bit above the full mark. Start the engine and allow it to idle for a few minutes.
  10.  


CAUTION
Do not run the engine above idle speed until it has built up oil pressure, indicated when the oil light goes out.

  1. Shut off the engine, allow the oil to drain for a minute, and check the oil level. Check around the filter and drain plug for any leaks, and correct as necessary.
  2.  

 
label.common.footer.alt.autozoneLogo