Thrust Bearing
WARNING: This page is about a different car, the 2000 Lexus SC 300, 2000 Lexus GS 300, 1999 Lexus SC 300, and 1999 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.
Install thrust bearing on No. 4 main bearing with grooves toward crankshaft (away from cylinder block). Replace thrust bearing if crankshaft end play is not within specification. See CRANKSHAFT, MAIN & CONNECTING ROD BEARINGS table under ENGINE SPECIFICATIONS.