A vehicle's oil reservoir can become contaminated by coolant when the head gasket fails, causing coolant to mix with oil. The oil returns to the oil reservoir mixed with coolant and will need to be removed before operating the vehicle. Operating the vehicle with contaminated oil causes failure of lubrication properties and serious damage to the engine.
Allow the engine to cool down completely.
Place the oil drain pan under the oil reservoir.
Remove the oil drain plug by using the crescent wrench and turning counterclockwise.
Allow all the oil coolant mixture to drain into the drain pan until there is just a slow drip.
Remove the oil filter by using the oil filter wrench and turning counterclockwise.
Install the new oil filter by turning it hand tight and 1/2 to 2/3 of a rotation more by hand.
Reinstall the drain plug by using the crescent wrench and turning clockwise until tight.
Open the hood and locate the oil fill plug. The oil fill plug has a yellow top with an oil can printed on the top. It is usually located on top of the right valve cover.
Pour all 5 quarts into the engine and close the fill cap.
Start the engine and allow the engine to come up to operating temperature.
Locate the oil dipstick and remove it from the tube. Use a shop towel to clean the oil from the dipstick. Put the dipstick back in the tube.
Remove the dipstick again from the tube and check the level. The level should not exceed the full mark on the dipstick. Check for bubbles separating the oil on the dipstick. Bubbles indicate that there is still coolant mixed with the oil. The oil will need to be changed again using the same procedure if bubbles are found.
