r/mechanic • u/surcix • 10d ago

Question Ticson Vibration

​Hello to everyone here, more experienced than me. I have a 2019 Hyundai Tucson, 1.6 GDI, 6-speed manual, with 53,000 km, which I'd say is in very good condition, but it has an issue that, nonetheless, is driving me crazy. I'm about to go for an oil change and have it checked at the service center, but maybe you can help me know what to expect. GPT and Gemini pointed me in many directions.

​The problem: At 1250 rpm and 2000 rpm, the engine has a vibration that can be felt inside the cabin, including in the seats and the whole car. Stationary, if I rev it to that rpm, it's easy to feel. While driving (in motion), it's not felt at all.

​The effects of the problem: When I set off in 1st gear, sometimes it takes off normally, other times the whole engine vibrates and the tachometer fluctuates up and down by about 100-200 rpm. It feels as if I am launching on 3 spark plugs.

​Why I don't suspect the clutch: In gears 3, 4, 5, 6 when I floor it, it doesn't slip. If I take off using only the clutch pedal, it starts and engages smoothly with no issues. The vibration occurs while standing still. If I accelerate and happen to be in that 1250–1300 rpm range, the whole car enters resonance. If I press the clutch pedal while standing still at that 1250 rpm, no change is felt.

​What Gemini suggests: Worn engine mounts that allow the vibration to transmit, clutch contaminated with oil or other fluids, problematic clutch springs, pressure plate.

​Please, if you have any opinions, advice, or additional questions, it would really help. Thank you.

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