How to Replace Spark Plugs on a Prado?

[AddysonMarie]

The method for replacing spark plugs on a Prado is as follows: 1. Remove the engine cover and clean the dust and oil around the high-voltage wire terminals; 2. Use a socket wrench to loosen the fixing screws of the high-voltage wire terminals; 3. Unscrew the high-voltage wire terminals, use a socket to remove the spark plugs, and install the new spark plugs. The Prado has a body size of 4840 mm in length, 1885 mm in width, and 1890 mm in height, with a wheelbase of 2790 mm, a ground clearance of 215 mm, a fuel tank capacity of 87 liters, and a vehicle weight of 2285 kg. It is equipped with a 3.5L naturally aspirated engine, delivering a maximum horsepower of 280 hp and a maximum torque of 365 Nm, with the maximum torque achieved at 4500 rpm.

[CarmenLynn]

Changing the spark plugs on a Prado, from my experience, isn't difficult but requires attention to detail. First, ensure the engine has cooled for at least an hour—safety first. Then disconnect the battery's negative terminal to avoid electric shock risks. Locate the spark plugs, typically positioned at the top or side of the engine with four to six holes. Remove the high-voltage wires or coils one by one to avoid mixing them up. Use a spark plug socket (standard 16mm) and a torque wrench—crucial for the Prado's recommended torque of 25 Nm. Remove the old spark plugs, clean any dust from the holes, and prevent debris from falling into the cylinders. When installing new spark plugs, apply a bit of anti-seize compound to prevent future removal difficulties, then gently tighten without over-torquing. Check the gap; the factory specification is 0.8-1.1mm. After replacement, start the engine and listen for smooth operation. It's recommended to replace them every 80,000 km. While different types like iridium or platinum plugs last longer, OEM ones suffice. DIY saves on repair costs, and monitoring fuel consumption changes can help prevent issues.

[Linda]

I've changed the spark plugs on my Land Cruiser Prado a few times myself, and it's been quite an interesting DIY project. The preparation is simple: just buy a spark plug socket and a wrench, which don't cost much. When working on it, the engine must be cold, and you can start by lifting the hood. After removing the coils and wires, remember to mark their positions to avoid incorrect reassembly. Don't force the spark plugs out if they're stuck; if they're rusty, spray some lubricant. When purchasing new spark plugs, make sure to get the original matching model, and check if the threads are clean before installing them. I usually tighten them to about 20-25 Nm, just a gentle twist is enough—over-tightening can damage the threads. The whole process takes about an hour, and after the change, the engine starts more smoothly, and there's an improvement in fuel efficiency. The first time I tried it, I was a bit nervous, but following the tutorial step by step made it go smoothly. After finishing, store the tools properly for future use. It's best to replace the spark plugs every 70,000 to 80,000 kilometers—don't wait until you have ignition issues to deal with it.

[VanCharles]

I think even beginners can handle changing spark plugs on a Prado. Just remember the key safety points: wait until the engine cools down before working, and disconnecting the negative battery terminal is a safer bet. The spark plugs are located at the front of the engine—handle the high-voltage wires gently when removing them to avoid breakage. Basic socket tools are sufficient for the job, with a 16mm size being common. Be careful not to drop any debris into the cylinder when removing the old spark plugs, and clean the port opening. For new spark plugs, opt for original NGK or Denso models. Apply a bit of grease during installation to prevent seizing, and don't exceed 25 Nm of torque—just tighten until secure. After replacement, start the engine to check for any unusual noises. If you're unsure, take it one plug at a time without rushing. The job takes about half an hour and should be done every 60,000 to 80,000 kilometers.