Just started getting a loud knocking noise comming from under my valve cover ...noise might be from push rods or lifters dont know is there something i can do to clean up the ports that feed oil to lifters?..do not think i am getting oil up to the lifters

Takes about 1 1/2 hours to figure it out. I can remove both valve covers in about an hour. 15 to 20 minutes to see which one is bad, if one of them are bad. Lifters and rockers arms usually make a ticking sound. Knocking is usually the piston rod. could be bearings at the crank or the wrist pin at the top of the rod. I've seen valve springs broken and only cause a ticking noise.

Oh yea, lifters can be replaced , best if you replace cam an lifters together ! Loud knocking is not usually associated with lifters , they usually make a ticking noise ! Knocking noise is most usually in the bottom of the motor , main or rod bearings . most of the time rod bearings !

Make sure the rocker arm is torqued to the proper specifications. (torque specifications: torque to 11 lb.ft, then tighten the bolt an additional 90 degrees)
If so, then your diagnosis is correct, barring a bent push rod.

The lifter rod is out or you cracked your piston mine did the very same

Have you checked the oil level on the dipstick? Low oil would cause the lifters to make a ticking sound. This noise will be coming from higher in the engine like under the valve covers. If the oil is full, you may have a lifter that is sticky. There are products you get at any auto parts store to add to your oil to free up sticky lifters and quiet them. However, you said it's a knocking noise. Knocking would also result from low oil level. Seriously low! If the oil is full and you have a knocking noise, it could be main bearings, connecting rod bearings on the crank or the pins on the top end of the connecting rods that hold them to the pistons. It could also be the piston skirts banging on the side of the cylinder due to worn rings. Any of these knocking noises would come from lower in the engine like in the block. Again, there are products to add to your oil to add extra cushion between surfaces to quiet this situation but you may not be far from a major overhaul. You didn't mention how many miles are on the engine but very low oil levels could have damaged any of these parts quickly.
Hope this helps. Good luck. I hope it's low oil or stciky lifters.
TG

It could be a collapsed lifter, a bent pushrod or a bad rocker arm. It could also be a bad piston wrist pin or rod bearing, and the noise sounds like it's up top.

If the engine knock is coming from deep inside the engine, the I agree, the rod is knocking.
If the sound is coming from closer to the top, it could be a valve lifter or push rod you are hearing. This isn't as bad, they last longer and synthetic oil or oil treatment helps.
If this doesn't happen all the time, if it's occasional or you hear a pinging noise, you could just have a bad knock sensor.

lifters tick and noise is upper end of engine if lifters are making noise could be from a bad valve,bad lifter ,push rod ,oil pressure,rocker arm - need to take do compression test find out if valve problem and which cylinder is problem also take off valve cover and check for proper oiling of valve head and look to see if and are damaged or loose-------a knocking sound usually comes from lower end of engine,rod knock etc.and thats usually rebuild of engine

its zero lash u have hydraulic lifters the noise can be from a bad lifter ,bent rod or burnt or bent valve

I'd consider some fresh, clean oil & filter change first of all, if it hasn't been done . drive it for a while providing it isn't too bad, & see if it goes away, if not get back to us.