So You Own A 2016 CRV With The 2.4L
The R18 and R20 engines got all the criticism from Honda's earlier years, but the 2016 model year carried over the K24W engine from the previous generation. It is a straightforward naturally aspirated four-cylinder making 184 horsepower. People assumed it was bulletproof because it is basically a detuned Accord engine. Most of it is. There are five things I have seen enough of at the shop to say you should actually be watching. This is the big one from the 2014-2016 timeframe. Unburned fuel gets past the piston rings and down into the oil pan, thinning the lubricant. Honda released service bulletins about it and extended the warranty on the engine in some regions. The issue is most aggressive in cold climates where the engine never reaches full operating temperature. If you do nothing but twelve-minute trips to the grocery store in sub-freezing weather, that fuel has nowhere to evaporate out of the crankcase. You will notice the oil level rising on the dipstick. It looks fine, maybe a little darker than usual, but the level creeps up. There is no check engine light for this usually. It just silently reduces the oil's viscosity until it stops protecting bearings properly.
The fix is not complicated. Change your oil every five thousand miles instead of the ten-thousand-mile interval Honda suggests. Use synthetic 0W-20. Keep the engine warm by driving it above fifty miles per hour for twenty minutes at least once a week. That burns off the fuel contamination. I had a customer last winter who kept ignoring this. When he finally brought it in, the oil smell inside the cabin was unmistakable. We changed the fluid and his oil level stabilized immediately after the first two hundred miles of normal driving.
2. Spark Plug Wire Degradation
The K24W uses individual spark plug wires rather than a coil-on-plug setup where the coil sits directly on the plug. Those wires run from the ignition coil pack to each spark plug. After about seventy thousand miles, the rubber insulation cracks and moisture gets in. You get misfires on cylinder two and three most often, which are right in the middle of the pack where the voltage drop is highest. The telltale sign is a rough idle that smooths out when you give it gas. Your check engine light will flash if it is severe enough. Code P0302 or P0303 will show up. Some people just replace the spark plugs and ignore the wires. That does not solve it. The wires are the weak point, not the plugs themselves. I replaced the entire wire set on a 2016 CRV with eighty-two thousand miles. The old wires crumbled when I pulled them off the coil pack. The new ones brought the idle back to how it felt when the car was new. It costs about two hundred dollars in parts if you order online. Takes maybe forty minutes if you are careful with the coil pack connectors.
Get the Full Details
3. VTEC Solenoid Carbon Buildup
There is a metallic rattle from the front of the engine on cold starts that lasts about three seconds. That is the VTEC solenoid. Oil pressure has to build up enough to push the solenoid plunger and engage the VTEC mechanism. If carbon has built up around the screen on the solenoid, oil flow is restricted and the plunger slams open instead of sliding smoothly. The noise is annoying but not immediately catastrophic. The problem worsens over time, especially if you are using conventional oil or stretching your oil change intervals. The carbon comes from blow-by gases and the positive crankcase ventilation system circulating crankcase vapors back through the intake. You can remove the solenoid, usually located near the timing cover on the driver's side, and clean it with carburetor cleaner. It takes about fifteen minutes. Sometimes the solenoid itself is worn and cleaning does not help. In those cases, a replacement solenoid from Honda runs roughly eighty dollars. I have found that using a quality synthetic oil and changing it every five thousand miles significantly slows carbon accumulation in the solenoid passage. Some people also install an oil filter sandwich adapter with an aftermarket bypass filter. That captures finer particles before they reach the solenoid, but it adds another maintenance step to your routine.
4. Hydraulic Engine Mount Failure
The 2016 CRV uses liquid-filled engine mounts. They are designed to absorb vibration by circulating fluid through an internal valve. Over time, the fluid leaks out or the internal diaphragm fails. When that happens, the mount goes from silky smooth to transmitting every engine vibration directly into the chassis. You feel it in the steering wheel, the floorboards, and the seat at idle. It makes the whole interior feel cheap and worn, even though the engine itself is fine. Driver's side mount fails first most of the time. That is the torque counter-mount and it takes the most stress during acceleration and deceleration. The passenger side mount and transmission mount follow eventually. A proper fix replaces all three. If you only replace the driver's side, the mismatch in damping characteristics between the new and old mounts can actually make the vibration worse. OEM Honda mounts cost about one hundred eighty dollars each. Aftermarket options from Sachs or Polytechn exist but they change the feel of the car significantly. I recommend OEM for this application. The job takes about an hour per mount with basic hand tools. The car needs to be lifted safely.
5. PCV Valve Diaphragm Rupture
The positive crankcase ventilation valve on the K24W has a rubber diaphragm inside it. When that tears, you get a vacuum leak that the engine control module cannot compensate for. The idle becomes erratic. The car may stall when you come to a stop. Fuel trims run rich because unmetered air is entering the intake manifold past the broken PCV. Sometimes you can hear a loud hissing sound from the valve cover area. Other times it is subtle enough that you only catch it when scanning for codes. P0171 or P0174 will appear. The PCV valve is integrated into the valve cover assembly on this engine, so you cannot just swap out a small inline valve like on older cars. The entire valve cover gasket set comes with a new PCV valve built in. I ran into this on a 2016 CRV that had been idling rough for months. The previous owner had replaced spark plugs and coils with no improvement. A smoke test revealed the leak immediately. Replacing the valve cover assembly with the integrated PCV cost about ninety dollars at the dealership parts counter. It is a straightforward job if you are comfortable working on top of the engine. Disconnect the battery, remove the intake duct, unplug the electrical connectors, and unbolt the cover. About thirty-five minutes total.
What This Engine Actually Does Well
Outside of these five issues, the K24W is reliable. The timing chain does not have the same catastrophic failure mode as some other Honda engines. The VTEC system works correctly when it is clean. The CVT paired with it shifts smoothly unless it has been neglected. Regular maintenance keeps this engine running easily past two hundred thousand miles. The problems listed above are all maintenance-related in one way or another. Short trips, stretched oil intervals, and ignoring early symptoms are what turn manageable issues into major repairs.
