
Image is for illustration purposes only. Actual part may vary.
M20310UB
This is a polyurethane motor mount bushing for the rear engine mounts on Peterbilt 379, 386, 387, 388, and 389 trucks equipped with Caterpillar engines (3406B/C/E, C10, C11, C12, C13). It replaces the original rubber bushing with a tougher polyurethane material to better dampen engine vibration and resist wear. Four of these bushings are needed per truck, and they are installed with M4962 bolts and LN104 lock nuts. Replacing worn motor mounts helps prevent excessive engine movement and protects driveline components.
Rear motor mount, 4 per truck. Compatible with Caterpillar 3406B/C/E, C10, C11, C12, C13 engines. Uses M4962 bolt and LN104 lock nut (sold separately).
Part Number: M20310UB
MOTOR MOUNT BUSHING POLY PETERBILT
Vendor: Automann
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside suspension & steering