What does the timing chain do in an engine?
The timing chain in an engine performs a very important function: it links the crankshaft and camshaft. Nylon gears and timing belts perform the same function on some makes and models. The intake and exhaust valves open and close in respect to the rotation of the crankshaft, which controls the strokes of the piston for firing.
How can I tell if my timing chain is bad?
Once the belts have been removed, start the engine. Place the probe of the stethoscope on the top or side of the timing chain cover. If you hear a rattling or scraping sound, with no other noise being emitted from the engine, it indicates a bad timing chain. Do not run the engine excessively long with the belts off.
What’s the difference between ticking and engine knocking?
Many motorists describe a ticking noise as “knocking”, though the two sounds are not interchangeable. While a ticking noise is higher pitched and closer in context to a rattling of sorts, engine knock sounds more like a repetitive hammering and is often much louder. Engine knocking is also generally far more serious than ticking.
Why does my engine make a ticking noise?
A loose or damaged engine fan can also be the reason for engine ticking or tapping noise. A visual inspection is enough to find out the problem. Check the bolts and clips to see if they are loose. Also, you can tell if the fan blades or shroud on the radiator are damaged just by looking at them.
Why does the timing chain make a ticking noise?
The timing chain can also make a ticking or tapping noise if oil pressure is an issue. Start by checking your oil level. Always do this with the car on a level surface. Pull out the oil dipstick, wipe it off, reinsert it and then pull it again. Ideally, the level will be close to (but not above) the full mark.
What is the role of the timing chain?
The timing chain has the important job of synchronizing the crankshaft rotation with the camshaft. This direct link provides the timing of the valves during their opening and closing sequences.
How can I tell if my timing chain has slipped?
Listen for any abnormal engine noises, with the engine idling, in the vicinity of the timing chain cover. Chains that have slipped time have slackened and can sometimes rattle during cold start or idle, or produce a swishing or scraping noise.
Many motorists describe a ticking noise as “knocking”, though the two sounds are not interchangeable. While a ticking noise is higher pitched and closer in context to a rattling of sorts, engine knock sounds more like a repetitive hammering and is often much louder. Engine knocking is also generally far more serious than ticking.