Q: There is a tapping sound coming from the engine of my vehicle. How do I go about diagnosing what this might be and how much a repair would cost? A: A repair technician will use a mechanic’s ...

Engine knocking, or detonation, occurs when fuel in the cylinders ignites unevenly, causing metallic pinging sounds, reduced power, and potential engine damage. Key causes include low-octane fuel, ...

My Subaru Impreza – ‘03 RS model (2.5l) - has begun to make a knocking noise (similar to a diesel engine) during start up in the morning. It slowly fades as the car warms up. The only think I can ...

I drive a 2009 Honda Pilot Touring 4WD. I hear some knocking when I start the engine. It eventually becomes relatively quiet after a minute or two. Would it be a good idea to start using synthetic oil ...

A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...

My Mk5 Volkswagen Golf, with hybrid stage two turbo, was making a whistling noise. It's now stopped and won't restart, plus lost all oil. The exhaust shows signs of oil in end pipes. What could this ...

Well we would suggest that you remove the rocker cover and investigate the noise, ie check to see if all valves are operating correctly. If all okay then it maybe that one of your sensors is faulty, ...

The 1.3L engine in a 2023 Nissan Rogue. The NHTSA opened an investigation into engine failures in December 2023 after receiving questionnaires from owners alleging engine knocking noises and/or metal ...

I have discovered an engine knocking noise and severe diesel blow-by problem in my 2015 Nissan X-Trail 1.6-litre diesel. Do we spend $10,000 for a second-hand engine and have that fitted? The car has ...

Hi Paul, I enjoy reading your articles. My 1.3CC petrol Toyota Corsa 1997,E-EL51 produces a tapping sound when I start it in the morning. The sound reduces when the dashboard oil goes off. My mechanic ...