Raymondrampape
if the timing belt becomes streched, it changes the relationship between the camshaft
and crankshaft. Which will in turn effect the valve timing and engine performance.
That is why many engines use automatic tensioners to prevent this from happening
Wiki User
∙ 14y agovariable valve timing is where the engine changes valve timing based on the driving situation much like ignition timing is changed to meet the needs of the engine in specific situations. in most cars valve timing is static and determined by the timing gear on the camshaft
If the peaks of the cam lobes are all worn the camshaft needs to be replaced. It will affect the valve timing and the air intake into the engine which in turn affects the performance.
valve timing diagram of two stroke engine
It is the "Advertised duration", used by the factory. It is the Valve timing from when the valve is .006inches off the valve seat to .006" off the valve seat.
According to Wikipedia, a variable valve timing is a "process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions".
Let's see, out of time, burned valve, stuck valve, valves adjusted too tight, stretched timing chain, flat cam, crossed plug wires. What is happening is this, the plug is firing the mixture in the cylinder, a valve is not sealing the explosion. Or, the spark plug is firing at the wrong time, thus igniting the "charge" in the exhaust, or intake manifold. In other words, the valve, and ignition timing, (spark) are out of sync.
Valve timing is not adjustable on a stock engine. The timing chain is either installer correctly or not.
Ignition timing or valve timing?
Yes accuauly its the cam that does control valve timeing.. on the lobes of the cam .
to inject oil into the valve timing controller assembly
Ignition timing or valve timing?
Your chain guides(plastic guides on either side of the chain) may be worn or broken, or the chain may be stretched from wear.If the guides are missing or worn, the timing chain can cut through the front of the block.