How to check the teeth on a camshaft?
Now, look at the cam or camshaft marks to see how many teeth they are off and which way you will need to turn the sprocket to get the marks lined up again. 3. Next, you have to remove the rocker arms for the camshaft you are going to move.
When is the piston at the top of its compression stroke?
At that point rock back and forth a little till your zeroed in between suck and blow; (it will be real sensitive) and there you have it, top dead center on the compression stroke. Move on to STEP FOUR. Now remove the hose and place a long screwdriver; coat hanger or straw into the spark plug hole to feel the height of the piston.
What to do when your timing chain jumps?
When you are sure the cam marks are lined up properly and the sprocket and the keyway on the end of the cam are lined up, you can push the sprocket back onto the cam and tighten the bolt back down. 9. Put the rocker arms back and re-install the tensioner if needed. 10.
What is the center distance from crank to Cam?
The actual center distance from crank to cam may or may not match the theoretical center distance based on chain pitch, number of pitches, and sprocket tooth count,” says Thompson. (Left) Center distance is shown in this illustration. Qualifying the CD is critical to eliminate deflection.
What should the index point be on a crank sprocket?
While discussing indexing tolerances on timing gears Thompson says, “You will find variable tolerances with regards to different manufacturers. As a general guideline, an installer can expect to be within a 0.25 of a degree from the marked index point of a multi-keyway crank sprocket.
Which is better a roller or a sprocket chain?
While this type of chain can be inexpensive, it does wear out sooner than the roller-type chain. Sprocket wear will cause variations in timing and increase harmonic vibrations. As with any metal-on-metal design, rollers offer a reduced-friction solution compared to non-rollers.
What happens when a cam is installed straight up?
When a cam is installed “straight-up,” the imaginary centerlines of the two shafts line up exactly. Advancing or retarding the cam pushes the centerline of the camshaft to one side or the other of the crankshaft centerline. This changes the Timing of the valve opening and closing events, in relation to the position of the piston in the cylinder.
Now, look at the cam or camshaft marks to see how many teeth they are off and which way you will need to turn the sprocket to get the marks lined up again. 3. Next, you have to remove the rocker arms for the camshaft you are going to move.
How does advancing or retarding a camshaft work?
Advancing or retarding the cam pushes the centerline of the camshaft to one side or the other of the crankshaft centerline. This changes the Timing of the valve opening and closing events, in relation to the position of the piston in the cylinder. How is it measured? Find the lobe centerline in relation to the piston’s position in the cylinder.
When does a cam line up with the crankshaft?
When a cam is installed “straight-up,” the imaginary centerlines of the two shafts line up exactly. Advancing or retarding the cam pushes the centerline of the camshaft to one side or the other of the crankshaft centerline.