What do the numbers on the timing tape mean?
Numbers to the left of zero on the timing tape refer to the piston as it travels down, while numbers to the right of zero refer to the piston’s upward motion. Moving the wheel right is called “advancing” the timing, while moving the wheel left is “moving back” the timing. Hook up your timing light or timing gun.
What are the symptoms of a bad timing chain?
Symptoms of a Bad or Failing Timing Chain. 1 1. Engine misfires or runs poorly. There are two ways to achieve valve timing in a combustion engine. The first is the two-gear method, which includes 2 2. Metal shavings found in the oil. 3 3. Engine won’t start or fails. 4 4. Check Engine Light is on. 5 5. Engine rattles while idling.
Where is the vs4801 pin in a camshaft?
4.1.2 Crankshaft position VS4801 Flywheel TDC Locking Pin. Insert VS4801 Flywheel TDC Locking Pin through the datum hole, which is located underneath the starter motor, and into the timing hole in the flywheel (Fig.4). NOTE: The datum hole can be difficult to locate and may be constricted by dirt/corrosion.
Why do you need to adjust the timing on your car?
How to Adjust Timing. The car’s timing refers to the ignition and the process by which the spark plugs fire, creating a spark in the car’s combustion chamber. Your timing must be at the correct setting for your car to perform at top level, affecting the speed and efficiency at which the engine fires.
What causes timing to slip on a 4 stroke engine?
The flywheel has a magnetic pickup on its edge that should align with the end of the magneto prongs. If it does not align, the timing has slipped. To confirm it, rotate the flywheel back and forth rapidly. If it moves on the crankshaft, the flywheel has sheared the key or slipped on the shaft.
Do you have to be dead on with timing belt alignment?
Because modern vehicles use so many electronics to control the engine with things such as crank and camshaft timing sensors, technicians need to be, as we say in the industry, “dead-on” with the timing belt alignment. The cam gear cannot be off by even a tooth, or the engine will set a DTC.
What can cause a tripped cam sensor code?
The most common cause of a tripped cam sensor code, according to a belt manufacturer, is the misalignment between the rear cam gear and timing belt. A DTC can be triggered with the cam gear being one tooth advanced or retarded.
What causes the ignition timing to change in a car?
As the weights move outwards they exert a turning force on the top of the distributor shaft relative to the driven part of the shaft, this moves in the same direction as the distributors rotation thereby causing the points/electronic trigger to actuate earlier and advancing the ignition timing.