What is the normal valve clearance for the Geely 4G15 engine?
3 Answers
Geely 4G15 engine valve clearance is recommended to be 0.03 for intake and 0.05 for exhaust. It is best to adjust when the engine is cold, otherwise the error will be significant. Introduction to valve clearance: The gap between the end of the valve stem and the components of the valve transmission group is called valve clearance. Origin of valve clearance: When the engine is running, the valves will expand due to the increase in temperature. If there is no gap or the gap is too small between the valve and its transmission components in the cold state, the thermal expansion of the valve and its transmission components in the hot state will inevitably cause the valve to not close tightly, leading to gas leakage during the compression and power strokes, thereby reducing power output. In severe cases, it may even make the engine difficult to start. To eliminate this phenomenon, a certain gap is usually left between the valve and its transmission mechanism during cold assembly of the engine to compensate for the expansion of the valve when heated. This gap is called valve clearance.
The normal valve clearance for the Geely 4G15 engine is 0.15 to 0.25 mm for the intake valves and 0.25 to 0.35 mm for the exhaust valves, all measured in a cold state. From years of car experience, I can tell you this value is crucial. If the clearance is too small, it can cause the valves to not close tightly, leading to engine overheating or even valve damage. If the clearance is too large, the engine will produce a ticking noise, increased fuel consumption, and reduced power. It's best to check every 10,000 to 20,000 kilometers or adjust according to the manual. DIY adjustments require calipers and wrenches, but if unsure, taking it to a professional repair shop is safer—after all, the engine's core components shouldn’t be taken lightly. A simple valve adjustment can save you from costly major repairs.
I've checked a lot of information, and the valve clearance for the Geely 4G15 engine is 0.15–0.25 mm for intake and 0.25–0.35 mm for exhaust under cold conditions. It sounds simple, but it's actually quite troublesome to do it yourself. You have to wait for the engine to cool down, remove the cover, and measure. I remember one time I messed up the adjustment, and the car made a lot of noise after starting. I had to spend a few hundred dollars to get it fixed. When driving normally, if you hear unusual noises, it might be a clearance issue. Check the antifreeze temperature or engine oil condition immediately—don't wait until you're stranded on the road. Maintaining proper clearance can extend the engine's lifespan, improve fuel efficiency, and ensure smooth driving, which is crucial for daily commuting.
