Crankshaft thrust washers Mitsubishi 4G63 4G64 4G69

The Mitsubishi 4G63, 4G64 and 4G69 petrol engines

The Mitsubishi 4G63, 4G64 and 4G69 four-cylinder petrol engines, as well as the Hyundai G4JS and G4JP listed by ACL, power the Mitsubishi Lancer, Galant, Eclipse, Outlander and Grandis, the Hyundai Stellar and Grandeur and the Fiat Fullback, among others. These Mitsubishi inline four-cylinder engines displace 1997 cc (4G63), 2351 cc (4G64) and 2378 cc (4G69); the 4G63 comes in SOHC or DOHC form, with 8 or 16 valves, and the 4G69 in SOHC 16-valve form.

Thrust washers

Thrust washers take the clutch thrust and set the crankshaft end play. On a tuned engine with a reinforced clutch, this thrust increases. Compared with the original, the ACL Calico version adds a dry film lubricant that reduces friction and wear and protects the thrust washer when oil is lacking. The King version, in lead-free Al20Sn1Cu aluminium, is certified by its manufacturer to meet or exceed the vehicle manufacturer's specifications.

Technical specifications

Technical guide

Each half washer has lubrication grooves on one face. This face fits on the crankshaft side, with the smooth face towards the block or cap. Fitted the wrong way round, the washer deprives the crankshaft bearing face of lubrication and wears it quickly.

Before fitting, coat the crankshaft-side face with assembly grease. Check that the half washers in the block sit flush, fit the cap without forcing it and tighten it following the manufacturer's procedure. Then check the end play with a dial gauge and compare it with the manufacturer's value.

The two brands

	ACL Bearing Company, an Australian manufacturer of high-performance engine bearings since 1949, supplies thrust washers uncoated or with Calico coating.
	King Engine Bearings, an Israeli engine bearing manufacturer since the 1960s, offers its OE Replacement range thrust washers in lead-free aluminium bi-metal.

Construction and advantages

Vehicle compatibility

These thrust washers fit the Mitsubishi, Hyundai and Fiat petrol engines (engine codes listed by the manufacturers, see the notes above) of the following vehicles: