How many kilometers should the spark plugs of the Fit be replaced?
2 Answers
The spark plug replacement interval for the Honda Fit is 100,000 kilometers, using NGK brand spark plugs. Honda Fit spark plug replacement tutorial: 1. First, remove the intake pipe and coolant reservoir. 2. After successful removal, use a socket to take out the spark plugs. Note: When removing, ensure the spark plug is vertically aligned with the wrench to avoid stripping the threads. 3. Compare the old spark plugs with the new ones. Carbon deposits are mostly found on the threads of the old spark plugs. For naturally aspirated engines, they can be cleaned and reused, while turbocharged engines should directly replace with new spark plugs. 4. Install the new spark plugs. During installation, carefully slide the spark plug down along the inner wall to avoid altering the ignition gap due to impact. Methods for cleaning carbon deposits from spark plugs: 1. Carburetor cleaner: Place an appropriate amount of carburetor cleaner in a container, soak the spark plugs for about 30 minutes, then scrub the spark plug head with a soft brush to remove carbon deposits. 2. White vinegar cleaning: The method is similar to the above. However, white vinegar cleaning is not recommended for frequent use as its corrosive properties can damage the spark plugs. After each cleaning, ensure the vinegar is thoroughly rinsed off the spark plug surface.
After driving the Fit for two years, my experience is that regular spark plugs need attention every 20,000 to 30,000 kilometers. During one maintenance session, the mechanic showed me the plugs - the electrodes had eroded by half a millimeter. They explained that the factory nickel-alloy spark plugs can't handle aggressive driving, especially for cars frequently driven on highways. The recent maintenance manual update states that third-generation Fits with iridium spark plugs can last up to 100,000 km, but turbocharged versions need earlier replacement. My conclusion: replace at 60,000 km for frequent stop-and-go traffic, inspect at 80,000 km for gentle driving, and visit the repair shop immediately if you notice sluggish acceleration or sudden fuel consumption increase.
