Complete cooling system flush and refill with Toyota Super Long Life Coolant to maintain proper engine temperature and prevent corrosion.

Warnings

Tools required

Parts

• Radiator drain plug washer × 1 — Use OEM specification

Fluids

• Toyota Super Long Life Coolant (Pink) — 10 qt

Preparation

1. Ensure engine is completely cold to the touch (minimum 2 hours after last operation)
2. Park vehicle on level surface and engage parking brake
3. Locate radiator drain plug on driver side bottom of radiator
4. Position drain pan under radiator drain plug with adequate capacity
5. Remove engine splash shield if equipped using 10mm socket

Procedure

1. 1

   Remove radiator cap and relieve pressure
   Slowly turn the radiator cap counterclockwise to the first stop and allow any residual pressure to release. Once pressure is released, press down and continue turning to remove cap completely. Set aside on clean surface.
2. 2

   Drain coolant from radiator
   Using 14mm socket, carefully loosen the radiator drain plug located on the driver side lower corner of the radiator. Remove drain plug completely and allow coolant to drain into pan. Inspect drain plug washer for damage and replace if compressed or cracked.
   Torque spec

   Block Drain Plug25 Nm (18 lb-ft)
3. 3

   Open cylinder block drain plug
   Locate the cylinder block drain plug on the engine block below the exhaust manifold. Using 14mm socket, remove the block drain plug to allow complete drainage of coolant from engine block. Allow both drain points to fully empty.
   ℹ️Block drain plug location may have limited access. Use socket extension if needed.
   Torque spec

   Block Drain Plug25 Nm (18 lb-ft)
4. 4

   Flush cooling system with water
   Once coolant has fully drained, reinstall both drain plugs with new washers to specified torque. Fill radiator with clean distilled water through radiator cap opening. Start engine and run until thermostat opens (cooling fan cycles on). Allow engine to cool, then drain water completely. Repeat flush process until drained water runs clear.
   ⚠Do not run engine for extended periods during flush. Monitor temperature gauge and stop if engine approaches operating temperature for more than 2 minutes.
   Torque spec

   Block Drain Plug25 Nm (18 lb-ft)
5. 5

   Final drain and prepare for refill
   After final flush, remove both drain plugs again and allow all water to drain completely. Reinstall radiator drain plug and cylinder block drain plug with specified torque. Verify all drain points are secure and hose clamps are tight.
   Torque spec

   Block Drain Plug25 Nm (18 lb-ft)
6. 6

   Mix and fill coolant
   Mix Toyota Super Long Life Coolant with distilled water at 50/50 ratio (5 quarts coolant concentrate to 5 quarts distilled water) for proper freeze protection to -34°F. Slowly pour coolant mixture into radiator opening until level reaches base of filler neck. Do not fill completely yet.
   ℹ️Pre-mixed 50/50 coolant can be used instead of mixing concentrate. Total system capacity is approximately 10 quarts including reservoir.
7. 7

   Bleed air from cooling system
   Locate coolant air bleed valve on top of engine near thermostat housing. Using flat blade screwdriver, open bleed screw approximately 2-3 turns. Continue adding coolant to radiator slowly until coolant flows from bleed screw without bubbles. Close bleed screw to specified torque once steady stream of coolant appears.
   ⚠Open bleed screw slowly to prevent coolant spray. Have shop towel ready to catch escaping coolant.
   Torque spec

   Bleed Screw7 Nm (5 lb-ft)
8. 8

   Complete radiator fill
   Continue filling radiator to just below the filler neck (approximately 1 inch from top). Install radiator cap securely by pressing down and turning clockwise until it clicks into locked position.
9. 9

   Fill coolant reservoir
   Fill coolant reservoir to the FULL line marking with the same 50/50 coolant mixture. Do not overfill beyond FULL mark.
10. 10

    Burp cooling system and check for leaks
    Start engine and allow to idle. Turn heater control to maximum temperature and fan to low speed. Allow engine to run until cooling fan cycles on at least once, indicating thermostat has opened and coolant is circulating. Monitor temperature gauge to ensure normal operation. Check all drain plug locations and hose connections for leaks during warm-up.
    ⚠Keep hands away from cooling fan and drive belts while engine is running. Monitor temperature gauge and shut off engine immediately if overheating occurs.
11. 11

    Final level check and top-off
    After engine reaches full operating temperature and fan has cycled, shut off engine and allow to cool for 15 minutes. Carefully remove radiator cap (system will still be warm) and check coolant level. Top off radiator if needed. Check reservoir level and add coolant to FULL line if necessary. Reinstall radiator cap.
    ⚠Use caution when removing cap after warm-up cycle. Turn cap slowly to first stop to release any pressure before removing completely.

Reassembly

1. Reinstall engine splash shield if removed, ensuring all clips and fasteners are secure
2. Wipe down any coolant residue from engine bay and radiator area
3. Dispose of old coolant at approved recycling facility - do not pour down drain

Verification

• Check coolant reservoir level with engine cold - should be at FULL mark
• Verify no visible leaks at radiator drain plug, block drain plug, or any hose connections
• Test drive vehicle and monitor temperature gauge for normal operation (approximately middle position)
• After first drive cycle (next day), recheck coolant level in both radiator and reservoir when cold
• Verify heater produces hot air at idle and while driving
• If available, use coolant hydrometer to confirm proper freeze protection to at least -34°F

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