How are timing belts connected to the crankshaft?
By definition a timing belt is a toothed belt that connects the camshaft or shafts to the crankshaft thus “timing”the top and bottom of the engine. The camshafts turn at exactly ½ of the speed of the crankshaft to time the valve operation to the piston operation.
How long does it take to change a timing belt?
As a service provider it is my duty to explain this concept to you the consumer. Many times it is a 4 or 5 hour job to change a timing belt, by not doing the job right and replacing all of the tensioners, idler pulleys and the water pump at the same time puts you, the consumer in harm’s way.
Why do you need to lock down the timing belt?
Even though belts will not last as long as a chain, they are quieter and often easier to line up correctly with the cam and crank locked down. Anytime the belt is removed, the cam and crank need to be aligned to TDC No.1, which is where the marks on the crankshaft pulley line up with the pointer on the front cover.
Can a broken timing belt cause a bent valve?
If you have not already bent your valves with a broken timing belt, you will likely do so if you spin the crankshaft without the camshaft spinning. Determine if the harmonic balancer pulley needs to be removed to remove the timing belt cover.
Even though belts will not last as long as a chain, they are quieter and often easier to line up correctly with the cam and crank locked down. Anytime the belt is removed, the cam and crank need to be aligned to TDC No.1, which is where the marks on the crankshaft pulley line up with the pointer on the front cover.
What do I need to change timing belt?
Special Tools Changing the timing belt requires no special tools. You will probably want to have a 14mm deep well socket, a 3″ extension for your 1/2″ drive, and you may want a steering wheel puller to remove the crankshaft pulley.
What causes crankshaft to skip timing belt cover?
4. Belt melted through timing belt cover and contacted timing belt cog. Belt segment lodged between lower timing belt cover and cog causing crankshaft to rotate free from timing cog OR timing belt may have skipped.
How often do you change the timing belt on a Miata?
Changing the Timing Belt (and front crankshaft seal) The Miata timing belt must be changed every 60,000 miles. Although the California Owner’s Manual says 105,000 miles, this is just to satisfy a state requirement that says timing belts should last 100,000 miles or more.