Don't try to fix them, replace them with new ones.
The lifters are in the cylinder heads.The lifters are in the cylinder heads.
If a lifter is worn out you are not going to fix it, you will want to replace it with a new one.
what are the torque specs for lifters on a 2000 Pontiac grand am gt
it depends on the car
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.
you might have to replace the lifters.
Usually when someone is talking about lifters with cars they are talking about the hydraulic lifters inside the engine that come in contact with the cam and lubricate the push rods that control the valves in each individual cylinder. Sometimes I've heard people mention lifters when talking about the struts used by some folks to raise or lower their car or even to "bounce' the car.
Parts that old replace them with new ones.
fix my car
Marvel Mystery oil, or a similar "top end" lubricant, after an oil/filter change. Depends on the age and valve system on you car. They could just need adjustment. Modern engines use hydraulic valve lifters. If these persist in rattling after warm up, you could have a worn camshaft and/or vlave lifters.
You will hear valve train clatter.
Try a different weight motor oil, one that will lube the lifters better when hot. Also use a quieting additive to quiet lifters.