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🧵 Cold Start Tapping – 2017 Mustang GT (S550 Coyote) – Ceratec Test Car: 2017 Mustang GT (Coyote Gen 2, stock, 56,800 km) Oil: ELF 5W-20 Full-Tech FEX + Motorcraft filter (OEM spec) Full Maintenance just made a few days ago. Issue: Tapping noise only at cold start, around 1,500–1,800 RPM...