Table of Contents
How is valve clearance adjusted?
Hold the post with a spanner while you slacken the locknut, then turn the post anti-clockwise to reduce the clearance and clockwise to increase it. When the gap is correct, hold the post steady while tightening the locknut, then check the clearance. Keep turning the crankshaft until you have checked all the valves.
How do I know if my car needs a valve adjustment?
When do I need to have a valve adjustment? You should have your valve lash inspected at manufacturers recommended intervals. A sure sign that it’s time for a valve lash adjustment is if your engine is making a loud clicking or tapping noise when starting up or if you experience a loss in engine power.
How do you calculate valve shim adjustment thickness?
Calculate the new valve shim adjustment thickness so that the proper clearance can be achieved. With a 2.4L engine, the formula for calculating the thickness would be as follows: (Thickness of New Shim) = (Thickness of Removed Shim) + (valve clearance measurement – 0.0146 inches)
How to adjust the valve shim on a Ford Ranger?
1 Keep the engine turned off. You will want it to be cold before you begin the adjustment process. 2 Remove the valve shim. You can do this by first repositioning the cam-lobe so that it is pointing upward. 3 Calculate the replacement valve shim adjustment size. Measure the shim’s thickness with a micrometer.
How much clearance do you need for a valve shim?
For example, if the exhaust valve clearance spec is .009 to .011 inches, you generally want to aim for 0.10 to .011, not .009. If you read up on shimmed valve adjustment, you’ll see that, to calculate the thickness of the shim you need, the formula is:
What is a valve shim on a car?
The valve shim of a car is a hardened metal disc responsible for the clearance adjustment between the camshaft-lobe and the corresponding valve it controls. Whenever a cam-lobe exists within a vehicle, it controls the valve directly.