Can I pull a valve lifter threw the push rod hole on a inline 6 2000 Jeep Cherokee?

Pull intake off pull off valve covers,loosin rocker arm bolts and remove ,, pull push rods out, after you have the push rods out you can pull the lifters out,,,,,,i suggest taking to a mechanic shop,,, if all you have is a ticking sound try this,,, buy a can of chemtol spray,,,chemtol only,,, with the little red straw for spraying,,,remove valve cover,,try to see if you can hear which lift or lifts is ticking,,,turn off car,,,loosen not remove that rocker arm,,,slid to the side,,count your turns,,,move rocker to the side,,, take chemtol spray and insert little spray straw and spray it down the hole in the center of the push rod ,, it will clean the lifter of the debris that is not letting it prime up,, repeat if nessary,, it works,,, see YOU TUBE,,, dirty oil causes this,,, put in clean oil and some lucas oil treatment to help prevent in future,,, keep oil changed ,,if it starts ticking again change oil and add more lucas,,, it might fix itself

My first guess would be a failing valve lifter. They can become weak with age and not able to hold oil pressure.
Especially in an engine with that many miles on the clock.
If the noise is constant you may be able to find out which cylinder by running a compression test. maybe.

This vehicle has hedraulic valves and should not need periodic adjustment. I think that your model, works like Ford, just tighten at the bottom and should be good to go....so, what happens if they tick? there are oversized push rods available.... But typically something got worn causing the issue.

Locate one offending valve, and investigate everything between the valve tip and the camshaft. Collapsed lifters cause this issue. Collapsed means the hardened surface of the lifter, that touches the camshaft. Not always so easy to extract and look.

If it has push rods, you will find them under the rocker cover on the top of the engine, they are hiding under the rockers. The rods ride on a lifter that rides on the cam and then they push the valves down, and squirt oil all over everything, a spring brings them back up. The overhead cam eliminated all these extra parts. Lifters, rods, rockers. Hope this helps.

Take compression test on that cylinder might be out of adj.( valve open to much )

depending all that is done about $300 dollars thats 12 lifters test 12 push rods replase rods $4.00 each rocker arm cover gasket oil filter and oil change afterwords. This does not include any replacement of oil pump or flushing which may be required, also would recommend a top engine clean before doing lifter replacement so when you change the oil once.

Sorry...lifters will not come out without removing the cylinder head

I had the same problem , Come to find out it was the crank barring's and not the lifter's. Take one of the crank barring's off and feel the crank where the barring goes and if it's rough it's more in likely the crank and not the lifter's but if it's smooth put the crank barring back pull the valve cover's and there's the lifter's , pull the nut off the lifter's and pull the lifter rod's out roll them on a flate surface to see if there bent. Then go to a auto part's store and get the haynes manual it will tell you everything you need to know.

I'm not positive but this may be worth a try,pull the valve cover and find the loose rocker and push rod,pull the rocker off,note how many turns it takes to remove the nut so you can reinstall with the same number of turns,then push down on the pushrod,it should give if there is air built up in the lifter,this should push all the air out and allow it to be pumped up with oil when you restart the motor.Like I said I'm not sure if this will fix the problem but may be worth a try.Please give a rating only if it helps.

No, it's fairly easy, just remove the valve cover, unbolt the rocker arms, remove pushrods. Make sure you have correct parts and compare length of new ones to old ones. Too long of a pushrod and you could have major damage. Slide pushrods into lifters, you can look down through the head and see the lifter. You can also feel when the rod is in the lifter correctly. Install rockers in reverse trying to put back in exact location. I recommend torqing these, you'll have to find the spec. You could spin the engine with coil unhooked so it won't fire before you put the valvecover back on to make sure they're all moving the same. Install valve cover, etc, your done.