The Main Seal (also called Crankshaft Main Seal) is a vital component of a vehicle’s engine system.
🔧 Description:
It is a circular rubber or silicone seal installed around the crankshaft where it exits the engine block.
Designed to prevent engine oil leakage while allowing the crankshaft to rotate freely.
Often reinforced with a metal or fabric casing for durability and heat resistance.
✅ Functions:
Prevents engine oil from leaking out of the crankcase.
Maintains proper oil pressure for engine lubrication.
Protects the crankshaft and engine components from contamination.
Helps maintain overall engine efficiency and longevity.
⚠️ Symptoms of a Faulty Main Seal:
Oil leaks near the front or rear of the engine.
Burning oil smell or smoke from the engine bay.
Low engine oil levels.
Visible oil drips on the ground.
🚗 Importance:
A good main seal is essential for engine health, lubrication, and preventing costly oil leaks. Timely replacement ensures engine reliability and avoids major repairs.