This procedure covers removal and replacement of a single engine block freeze plug on the 2019-2024 Toyota RAV4 2.5L I4 engine, requiring partial coolant drain and access to the engine block side.

Warnings

Tools required

Parts

• Engine freeze plug (size specific to location) × 1 — Use OEM specification
• RTV sealant or freeze plug sealant × 1 — High-temperature silicone sealant

Fluids

• Toyota Super Long Life Coolant (Pink) — 3 qt

Preparation

1. Park vehicle on level ground and allow engine to cool completely (minimum 2 hours)
2. Disconnect negative battery terminal to prevent electrical issues
3. Raise and secure vehicle on jack stands if freeze plug is accessible from underneath
4. Place drain pan under engine block near radiator drain plug
5. Remove engine splash shields and under covers as necessary for access
6. Identify exact location of failed freeze plug on engine block

Procedure

1. 1

   Drain engine coolant
   Open radiator drain plug located at bottom of radiator and drain coolant into catch pan. If freeze plug is located low on block, drain until coolant level is below the freeze plug location. For plugs higher on block, complete drain may be necessary. Remove radiator cap only after confirming engine is cool to speed draining.
2. 2

   Remove components blocking freeze plug access
   Depending on freeze plug location, remove any components blocking access. Common obstructions include: starter motor (if accessing driver side lower plugs), engine mount brackets, wiring harnesses, or coolant hoses. Label and photograph connections before removal. For starter removal, disconnect electrical connections first, then remove mounting bolts.
   ⚠Support engine with jack if removing engine mount components to prevent engine from shifting.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
3. 3

   Clean area around freeze plug
   Use wire brush and shop towels to thoroughly clean the engine block surface around the failed freeze plug. Remove all rust, old coolant deposits, and debris. A clean surface is critical for proper sealing of the new plug.
4. 4

   Remove failed freeze plug
   Using freeze plug removal tool, punch and hammer, or a self-tapping screw with slide hammer, remove the old freeze plug. If using punch method: create a notch on one edge of the plug and use punch to rotate plug sideways in bore until it can be extracted with pliers. Avoid damaging the freeze plug bore in the engine block during removal.
   ⚠Do not strike freeze plug directly inward as this can damage the freeze plug bore and prevent proper sealing.
5. 5

   Inspect and prepare freeze plug bore
   Thoroughly inspect the freeze plug bore for cracks, corrosion, or damage. Use wire brush or abrasive pad to clean bore until bare metal is visible. The bore must be smooth and free of rust pits for proper seal. Check that bore diameter is correct for replacement plug - any significant pitting may require oversized plug.
6. 6

   Apply sealant to new freeze plug
   Apply thin, even coat of RTV sealant or freeze plug sealant around the outer edge of the new freeze plug as specified. Do not use excessive sealant as it will squeeze out during installation. Ensure plug is correct size and type (cup type vs expansion type) for your application.
7. 7

   Install new freeze plug
   Position new freeze plug squarely in bore with concave side facing outward (cup facing out). Using appropriate installation tool or socket that matches plug diameter, drive plug into bore evenly until it seats flush with block surface or approximately 1-2mm below flush depending on plug design. Work carefully to keep plug square to bore during installation. If torque specification applies, tighten to specification.
   ⚠Ensure freeze plug remains square to bore during installation. A cocked plug will leak immediately.
   Torque spec

   Freeze Plug10 Nm (7 lb-ft)
8. 8

   Allow sealant to cure
   Allow RTV sealant to cure according to manufacturer specifications before refilling coolant system. Most high-temperature RTV sealants require 15-30 minutes of cure time, but check product specifications. Wipe away any excess sealant that squeezed out during installation.
9. 9

   Reinstall removed components
   Reinstall all components removed for access in reverse order of removal. Reconnect all electrical connections, hoses, and brackets. If starter motor was removed, ensure electrical connections are secure and mounting bolts are torqued to specification. Replace any gaskets or seals that were disturbed during disassembly.
   ℹ️Refer to photos taken during disassembly to ensure correct routing of wiring harnesses and hoses.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

   Sensor Bolts11 Nm (8 lb-ft)
10. 10

    Refill cooling system
    Close radiator drain plug. Fill cooling system with Toyota Super Long Life Coolant (Pink) mixed to proper concentration (typically 50/50 with distilled water). Fill through radiator cap or coolant reservoir to proper level. Start engine with radiator cap off and allow to warm to operating temperature while monitoring coolant level. Add coolant as level drops during burping process.
11. 11

    Bleed cooling system
    With engine running and heater set to maximum heat, allow engine to reach operating temperature. Squeeze upper radiator hose several times to help purge air pockets. Run engine until cooling fans cycle on and off at least once. Top off coolant to proper level and install radiator cap. Recheck coolant level after engine cools.
    ⚠Watch temperature gauge closely during bleeding process to prevent overheating.

Reassembly

1. Reinstall all splash shields and under covers removed for access
2. Reconnect negative battery terminal
3. Lower vehicle from jack stands if raised
4. Clean up any spilled coolant and dispose of old coolant according to local regulations

Verification

• With engine at operating temperature, inspect freeze plug installation area for any signs of coolant seepage
• Check coolant level in reservoir after engine has cooled - top off if necessary
• Monitor coolant level over next several days to confirm no leaks are present
• Verify no warning lights are present on instrument cluster
• Confirm heater operation is normal indicating proper coolant flow
• Check that all reinstalled components are secure and functioning properly

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