The crankshaft oil seal is basically one of the most important things under your vehicle hood. Its main work is to seal the openings on either end of the crankshaft —the front and the rear. It also assist maintain the crankcase seal, and while it is produced from durable material able to withstand pressure, heat, and oil, this seal will wear out over time.
Depending on what type you’re dealing with, a change can be easy. The front crankshaft oil seal can be repaired by any body with the right directions, but unless you have all the right equipment, it is advisable to have the rear crankshaft oil seal replaced by a professional auto mechanic.
1 – LIFT THE CAR
Before you start you’ll need to jack up the car. Use a lug nut wrench to take out the front wheel and place the jack stand under to support it.
2 – REMOVE THE BELT
Next, you will have to remove the serpentine belt from the engine. Place a three-inch breaker bar on the tensioner and lift it. Pull the belt out from the alternator and pull it off the crankshaft to completely remove it.
3 – TAKE OUT THE SPLASH SHIELD
The splash shield that houses the front crankshaft oil seal will want to come off as well. This is found inside the wheel well next to the engine. To remove it, begin by pulling out the push pins on top. Then, use a panel remover to take out the center of the pin before you take the rest out. Once all the push pins are gone, you can get rid of the shield as well.
4 – TAKE OUT THE CRANKSHAFT OIL SEAL
Take out the 15mm-headed bolt holding the crank pulley ; then, take out the bolts and the pulley itself. You should now be able to access the crankshaft.
Pry out the shield, which is the round ring-like metal found on the center, using a screwdriver to get to the oil seal.
5 – INSERT NEW SEAL
Before you begin to make the replacement, check out how deep it goes to ensure that you are able to properly fit it with a new one. If it goes too deep for you to pull out, then you will want to take the vehicle to professional instead of persisting.
Once the old seal is out, put the new one into place. Ensure that it is properly embedded by using a soft hammer to tap it until it is firmly secure.
6 – REPLACE EVERYTHING
After you have put the new crankshaft oil seal, you can put the shield back on and tighten it with the all the bolts you took out. Put back the splash shield and replace the push pins as well before you fit the serpentine belt where it belongs. Ensure that the bolts and the belt are properly placed before putting the wheel back in.