Cooling System Specifications Lexus LS I

ES250

1. Ensure drain cocks are closed and tightened. Loosen coolant outlet union bolt 5 turns. Slowly fill system with coolant mixture.
2. When system is full, close and tighten union bolt to 13 ft. lbs. (18 N.m). Install radiator cap. Warm up engine and check for leaks. Recheck coolant level and refill as necessary.

LS400

1. Ensure all drain cocks are closed and tightened. Remove fill plug from coolant inlet housing. Turn ignition and A/C blower fan on. Adjust temperature control to highest setting (Hot). Ensure heater valve lever, in engine compartment, is at 2 o'clock position.
2. Slowly add coolant mixture through coolant inlet housing until system is full. Install fill plug with new gasket and tighten to 33 ft. lbs. (44 N.m). Slowly add more coolant mixture at coolant reservoir tank. Start engine and let idle for at least 10 minutes.
3. Add more coolant mixture to coolant reservoir tank to just below overflow pipe. Bring engine speed to 2000-3000 RPM for 5 minutes. Recheck coolant level at coolant reservoir tank and add as necessary. Recheck system for leaks.

COOLING SYSTEM SPECIFICATIONS