Hello, my suggestion would be just opening the hood when the noise goes on. Try to locate where the noise comes from. I have similar problem with my Taurus 2000 SE. It occasionally makes the noise somewhere under the hood. I sent the car to pep boys today. they were not able to locate the noise because it was quiet . so i have to wait until the noise goes up again and open the hood and see.
Has no belt,, It has a timing chain and gears. Trust me here, Whatever problem that you are having that makes you ask this question. The problemWON'T BE THE CHAIN AND GEARS.
Your question really makes no sense. Normally a timing chain will last the life of the engine as replaced when the engine is rebuilt.
www.nhtsa.gov Could be the timing tensioner about to break. Really sucks when that happens because there is absolutely no room to work on the timing while the motor is in the car. But, it can be done.
A chain. The only engine Toyota makes anymore with a timing belt is the V8 engines in the Trucks, Tunda and Sequoia and 4Runner
Your question makes no sense.
You can tell a timing chain is bad when your engine makes a sharp washboard-like sound that increases in intensity when the engine's RPMs increase.
The 129R with the 6 cylinder engine - the 300SL - has a timing chain. Please note also that Mercedes Benz makes a modified tensioner(s) to correct a problem with the chain rubbing on the cover.
Taurus
Probably distributor cap, ignition timing, timing chain/cam timing or burned exhaust valve(s). Pick one.
Currently the only engine that Honda makes that has a timing chain is the 2.4L 4 cylinder, remember 2.4 displacement only. any other engine Honda makes has a belt which needs replacement every 60,000 miles
its the ecm i had a 99 frontier same motor and all still have the repair manuel for it
bad ignition timing is correct. The timing gears may have slipped, and if the timing system uses a belt instead of a chain then the belt could have worn. The timing systen keeps the intake, exhaust and cyclinder pistons all in time so the engine will fire correctly. If the belt or chain slips even just a small amount, then the valves let gas in or out before or after the piston is at the point where the cylinder shout fire the spark plug. If the belt or chain slip far enough the engine will not fire at all. Bad ignition timing or fuel getting to the exhaust.