1993 Toyota 4Runner Replace Head Gasket
There might come a time you have to replace the head gasket in a 1993 Toyota 4Runner. Reasons for a head gasket change include improper installation, worn bolts, an overheated engine or a coolant leak. Whatever reason you are replacing the gasket, you still have to remove or detach the components near the top section of the 2.4-liter engine. Although, the steps for changing the gasket in the various 4Runner models are same, you need to note the engine to ensure you have the correct tightening sequence for the cylinder bolts.
|Ratchet and socket|
|New head gasket|
Replace Head Gasket
- Separate the battery terminal cables. Release the fuel system pressure. Drain the motor engine in a drain pan and empty the coolant from the radiator drain plug. Only work on the vehicle when with the engine is cool.
- Write on a piece of tape the name of the car parts situated close to the upper portion of the engine. Disconnect, unlatch or remove the assemblies, wires, covers belts, including wires, manifolds, power steering in pumps and ignition coils.
- Disconnect the lines and hoses, such as brake booster, charcoal canister, fuel return line, vacuum switching valve and main fuel line attached to the fuel inlet. Separate the wires, including the water temperature gauge sender, fuel cut solenoid valve and cold mixture heater wire.
- Position the motor to top dead center by lining up the marks of the crankshaft and the camshaft pulley. Lift the camshaft pulley from the vehicle and slide the timing belt out of position.
- Loosen the cylinder head bolts in the correct sequence in three passes. The loosening sequence for the head bolts on the top row includes 1, 7, 9, 6 and 4 and the lower row bolt numbers are 3, 5, 10, 8 and 2. Raise the cylinder head off the engine block and lift the old gasket from the engine block. Place the old gasket in the trash.
- Wipe, clean and scrap the area well, gasket mating surface and cylinder block. Put paper in the cylinder wall to prevent dirt or dust entering the assembly.
- Lower the new gasket on the engine block with the word "front" or "top" facing upward. Sit the cylinder head on top of the head gasket. Assure both parts are aligned with the dowels. Add liquid sealer to the block corners.
- Tighten the new head bolts in the correct pattern in three passes. The tightening pattern on the upper row includes bolt numbers 10, 4, 2, 5 and 7 and the lower row includes bolt numbers 8, 6, 1, 3 and 9. Torque to 58 foot-pounds with a torque wrench.
- Ensure the engine is at top dead center. Connect the battery terminal cables. Replace the coolant in the cooling system and refill the engine oil tank. Start the Toyota 4Runner and allow the vehicle to warm up. Examine the vehicle for leaks and recheck the fluid levels.