That is one thec. question, That hardly anyone would care about as long as it loads up and stops clicking.
That is the hydraulic lifter
There could be several reasons why you have a noisy hydraulic valve lifter. One reason could be worn our parts in the entire valve train. A loose rocker arm could also cause noise.
Worn valve train? Hydraulic valve lifter worn or "hung-up"? Lack of lubrication to rocker arms?
Collapsed hydraulic valve lifter? Rocker arm (valves) need adjusting?
Depending on the vehicle, it most likely needs adjustment.
03 impala missfire dont have same power after second gear
Tapping valves is a noise made by too much clearance between the valve lifter and the valve. Modern engines have hydraulic lifters. If you have too little oil pressure or run the engine low on oil, the lifters will make noise. The lifter can also wear out.
on a 98 ford taurus what are the symptoms of a bad hydralic valve lifter
No. The valve uses an hydraulic lifter that is built in the rocker arm assembly. The whole rocker arm has to be replaced.
The lifter's are all the SAME. the push rods are what is DIFFEERENT. Some are longer the the others. They MUST be put in the right place are you will bend a valve as soon as the engine turns over.
The purpse of valve lifters is exactly what it says, to lift the valve.
It's a rocker arm tapping at valve stem. Hydraulic lifters (hydraulic rocker mounts) are the common reason for the ticking. If it doesn't go away when the engine heats up, consider replacing the lifter where the ticking comes from.