CAMSHAFT BEARING 8973569390 suitable for NPR models equipped with 4HF1 6HE1 engines

Design Philosophy

Standard-size camshaft bearing for 4HF1/6HE1 engines. Precision-made with layered alloy construction to provide a durable, low-friction surface that supports the camshaft under continuous valve train loads.

How It Works

Installed between the camshaft journals and the cylinder head or block. The bearing maintains a thin oil film that separates metal surfaces, reducing friction and wear while keeping the camshaft in precise alignment.

Problems It Solves

Fixes camshaft knocking, low oil pressure, and bearing seizure caused by worn or damaged bearings. Restores proper camshaft clearance, ensures accurate valve timing, and prevents costly camshaft damage in NPR trucks.