What causes the abnormal noise after a cold start of Honda CR-V?
3 Answers
Honda CR-V abnormal noise after cold start reasons are as follows: Hydraulic lifters: Due to low oil pressure or wear in the hydraulic lifters themselves, air enters the hydraulic lifters, resulting in a "ticking" sound. Valve clearance: Wear in the valve rocker arms causes excessive valve clearance. Carbon canister purge valve operation sound: This is a normal sound and can continue to be used. If the noise is too loud, it is recommended to have it checked at a 4S shop. Three-way catalytic converter: A "clicking" sound within half a minute after a cold start, which then disappears, is usually caused by the expansion of the three-way catalytic converter as it heats up.
My CRV also makes squeaking noises when starting in winter, and I've been thinking about it for a long time. It might be a belt issue—the rubber hardens in cold weather, causing slippage and noise upon startup, which goes away after a few minutes of driving as it warms up. Another possibility is the engine chain tensioner; when the oil hasn't circulated yet, the chain is loose, producing a clicking sound similar to a loose bicycle chain. The exhaust pipe gasket can also create a metallic tapping noise due to thermal expansion and contraction, though this isn't a serious concern. Lastly, check the alternator bearing—lack of lubrication or wear can cause a humming sound. The key is to identify where the noise is coming from. If it persists for several minutes without fading, it's best to have a mechanic lift the car and inspect the chassis components to avoid turning it into a major issue.
I've driven my CRV for three years and have encountered cold start noises twice. The first time was due to a worn-out belt - it sounded like a squeaking mouse, but replacing it fixed the issue. The second time was the hydraulic lifters; when the weather was cold, the oil flowed slower, causing the valve stems to tick. The noise disappeared after about thirty seconds once lubrication reached all parts. Most of the time, this doesn't require repair - just switch to a thinner oil. My advice is to wait two minutes after starting the car before accelerating, allowing the oil to circulate properly. Also, stick to regular maintenance schedules: check the belt every five years or so, and don't overlook the exhaust pipe gasket - if it rusts through, repairs will be much more expensive.
