What causes timing chain slap?
What causes timing chain slap?
Timing chain noise is commonly most noticeable during cold startup of the vehicle when oil pressure and oil flow is at its lowest. Excess slack in the timing chain can cause a rattling sound or even a clanking sound if the slack is severe enough to cause the chain to contact the timing chain cover.
What kind of noise does a timing chain make?
Listen for a metallic sound that resembles a rattling or scrapping noise. The sound can be intermittent or constant, but it will be a metal to metal contact. Such a noise will reveal a loose timing chain hitting the inside of the timing chain cover every time it rotates. You might also hear a metallic slapping noise.
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 do you do when your timing chain rattles?
Don an automotive stethoscope and place the probe on the top or side of the timing chain cover. If you hear a rattle, metal to metal slapping or scraping coming from inside the cover, it indicates a timing chain noise.
How much does it cost to replace a timing chain?
Prepare to have a repair budget of around $1,000 to $2,500 for both the parts cost and labor if you’re expecting a timing chain replacement. If, however, you are the DIY type, you may purchase a timing chain or belt and install it yourself at a price of around $80 to $250.
What happens if you break your timing chain?
Timing chains don’t usually break (timing belts do!), but chains can get far enough out of time so that the vehicle can’t be driven. If you’re driving on the highway, the engine can instantly shut down without any warning. If this happens to you, immediately and carefully pull over to the side of the road while your car still has its momentum.
How can I tell if my timing chain is too slack?
Listen to the action of the rocker arm tappets. If they seem loud, move the stethoscope further down the valve cover and listen again. Move a few inches at a time. Listen for noisy lifters. If all the lifters sound noisy, it means that the timing chain has too much slack in it. This can work for V6 and V8 engines.
Listen for a metallic sound that resembles a rattling or scrapping noise. The sound can be intermittent or constant, but it will be a metal to metal contact. Such a noise will reveal a loose timing chain hitting the inside of the timing chain cover every time it rotates. You might also hear a metallic slapping noise.
Don an automotive stethoscope and place the probe on the top or side of the timing chain cover. If you hear a rattle, metal to metal slapping or scraping coming from inside the cover, it indicates a timing chain noise.
