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About crankshaft seal
The crankshaft seal is the primary barrier that prevents oil from leaking on and off the crankshaft. It lies behind the main shaft / harmonic balancer pulley on the front lower side of the engine. Most engines need to remove belts, pulley, harmonic balancer, and timing cover prior to the panel can be replaced. The crankshaft seal can dry out, break out, or wear a groove in the shaft over time so as to allow excessive clearance and oil to leak. If you have a bad seal, after it's parked overnight, you can see oil puddles underneath your vehicle. If the engine runs out of oil or has been repaired, oil leakage will not go away. If left unattended, your engine may suffer severe damage from a lack of oil.
What is the purpose of crankshaft seal?
Typically, they are placed on the front timing cover and seals to the end of the crankshaft as it rotates. Although they are a relatively simple component, they serve a significant purpose in keeping the oil used and thrown constantly by the shaft when it leaks out of the engine's crankcase.
How crankshaft seal works?
Your car engine is fitted with lots of seals, so you may have a bad day when the mechanic says to you "you've blown a seal." then it’s mainly because of the crankshaft seals. There are two, one on the rear of the crankcase and the other on the front where the crank pulley runs from the water pump, the alternator, and the rest of the engine accessories are taken out. The crankshaft requires seals because the crankcase is full of oil; the screws hold the oil inside the motor so the crankshaft can spin and ride.
Where is crankshaft seal located?
The crankshaft seal is the seal that is found on the engine front, which seals the end of the crankshaft with timing cover.