This is a toughie. First you have to decide which lifter it is then pull the rocker cover and find the rocker arm that has play in it. Then look at the lifter and where the push rod rides should be stuck down further in the lifter bore than the rest. Or press down on the inside and if it goes down over 1/8 inch and is springy the lifter is bad.
You can tell a bad valve by doing a compression test.
In most cases, you can tell that your lifters are bad, in your car engine, by the ticking noise. A bad lifter will make a tapping sound.
with the rocker cover removed, try pushing down on the pushrod end of the rocker arm. if it moves ,the lifter is bad
Look in the valley between the lifter bores. If there are two bosses with small threaded holes, then it is a roller block. These holes are for the bolts that hold the spider bracket that holds the roller lifter brackets in place. You can buy roller retrofit lifters to use in a non-roller block.
Yes, it is important for the oil port hole on a roller lifter to face towards the oil feed in the engine block. This ensures proper lubrication to the lifter and helps prevent premature wear or damage.
hydraulic lifter non roller
on a 98 ford taurus what are the symptoms of a bad hydralic valve lifter
Roller
You can't fix a bad lifter, replace the bad lifter with a new one.
flat
There's no need to they will prime themselves when the engine starts.
Take a pushrod and push down on the plunger in the lifter. A hydraulic lifter is spring loaded.