CATERPILLAR-3054-3056-VALVE-SEAT-EX

109-3428 is an exhaust valve seat insert for Caterpillar's 3054 and 3056 engines, pressed into the cylinder head to give the exhaust valve a hardened surface to close against. Exhaust seats run hotter and wear faster than intake seats simply because they're handling combusted gas rather than fresh air, and a receding or pitted seat shows up as a gradual loss of compression on that cylinder. Orange.net.za ships this part fast, South Africa-wide.