why does my Toyota Highlander XU70 (2020-Present) emit white smoke from exhaust

Solution

1. Preparation

• Tools Required: OBD-II scanner, coolant pressure tester, compression tester, basic socket set, torque wrench.
• Safety Warnings: Disconnect the battery before starting work. Allow the engine to cool completely before opening the coolant system.

2. Replace Head Gasket (if faulty)

1. Drain Coolant: Remove the radiator cap and drain the coolant from the system.
2. Remove Components:
   • Remove any accessories and components obstructing access to the cylinder head (e.g., intake manifold, exhaust manifold).
   • Disconnect fuel lines, electrical connectors, and sensors as necessary.
3. Remove Cylinder Head:
   • Loosen and remove the cylinder head bolts in the recommended sequence to prevent warping.
   • Carefully lift the cylinder head off the engine block.
4. Inspect and Clean:
   • Inspect the head and block for warpage or cracks. Resurface if necessary.
   • Clean the mating surfaces thoroughly to remove old gasket material.
5. Install New Head Gasket:
   • Place the new head gasket onto the block, ensuring correct orientation.
6. Reinstall Cylinder Head:
   • Position the cylinder head back onto the block and install the bolts.
   • Torque the head bolts to the manufacturer's specifications in the proper sequence.
7. Reassemble Components:
   • Reinstall the intake and exhaust manifolds, reconnect fuel lines, and electrical connectors.
8. Refill Coolant: Fill the cooling system with the appropriate coolant mixture.