Front crankshaft oil seal for Nissan engines ️

This precision lip seal sits at the nose of the crank behind the pulley. Its job is simple but vital: keep engine oil in and dirt out. With a fresh seal, your motor stays clean, belts stay dry, and oil level remains stable for dependable daily running .

Why you need it

It prevents oil loss at the front main journal, protects the timing area, and reduces mess on the balancer and accessories. A quality elastomer and spring-loaded lip maintain contact with the crank at all speeds and temperatures.

How it works

A garter spring pushes the sealing lip against the crankshaft. Micro oil film lubricates the contact, while dust ridges and a tight outer shell lock in the timing cover. Materials like NBR/FKM handle heat, oil, and rotation.

What happens if it fails ⚠️

Expect oil drips at the pulley, wet belts, burning oil smell, alternator slip, undertray soak, and steady oil loss. Prolonged leaks can degrade the timing belt/chain components and risk engine damage from low oil ️.

Tech tips for fitting

Inspect crank surface; polish light grooves. Clean bore, install square and flush. Lightly oil the lip, keep the spring in place, and torque the pulley bolt to spec.

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