How to distinguish the valve springs of the X-Trail?
3 Answers
X-Trail valve spring identification method: The red valve spring is for intake; the yellow one is for exhaust. The function of automobile valves is to input air into the engine and expel the exhaust gases after combustion. In terms of engine structure, they are divided into intake valves and exhaust valves. The intake valve draws air into the engine to mix with fuel for combustion; the exhaust valve expels the burned exhaust gases and dissipates heat. The X-Trail is a compact SUV from Dongfeng Nissan, equipped with a 2.0L 151 horsepower L4 engine and a CVT continuously variable transmission (simulating seven gears). The engine has a maximum power of 111kW and a maximum torque of 194Nm.
I've been repairing cars for nearly 20 years, and distinguishing the valve springs on the X-Trail is quite straightforward. Mainly look at the spring's color and labels—most are blue or silver with numeric codes, and use calipers to measure an outer diameter between 38 to 42 mm. Older springs lose elasticity when they sag; slow rebound after compression is a sign of failure. Once worked on a 2015 model that shook badly at startup—disassembly revealed a cracked spring. Recommend having mechanics check during maintenance; don’t overlook distinguishing old from new, and always use genuine parts. Springs typically last 60,000–80,000 km; delaying replacement can damage valves, leading to costly engine overhauls. Watch for unusual engine noises—early action saves hassle.
My Nissan X-Trail has been running for eight years, and last time I learned to identify valve spring issues with the engine. Simply compare the number of coils and height—new springs are tighter, while old ones become loose and deformed. To identify them, you need to open the engine cover and check the part number label against the VIN code. Back then, my idle was unstable, and I found the springs covered in rust, so I replaced them immediately. When buying, don’t go for cheap alternatives—aftermarket parts are prone to breaking. Here’s a tip: If you hear abnormal ticking sounds during startup, it might be due to aging springs. For maintenance, inspect them every two years—safe driving means not overlooking small issues.
