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IT IS MESSY BUT YOU CAN ADJUST LIFTERS BY ADJUSTING VALVES UNTIL THEY ARE QUIET WITH THE VALVE COVERS OFF AND THE ENGINE RUNNING. I SUGGEST ONE SIDE AT A TIME.
Your valves could be out of timing. Meaning they are open when they should be closed and trying to cause compression. You could have a bad compression ring on one of your pistons, but if none of your cylinders have compression, then it is highly doubtful that is the problem. Most all cars can adjust their own timing nowadays. So if your timing is off, then it could be the sensor that regulates the timing. If your valves are stuck open, then you won't get compression either, but it is again highly unlikely that every valve is broken. Your camshaft opens and closes all of your valves, so it could be a cam problem too. There are many parts to the camshaft and what it does, (lifters, springs, push rods, etc...) and unfortunately they are all internal engine parts, that are not likely to be cheap. Hopefully it is just the timing. It could even be the spark plugs not firing in the right cylinder at the right time. (another effect of timing being off)
You should have hydraulic lifters, unless someone changed them along the way. Normally nobody puts solid lifters in a vehicle that is a driven on the street daily. That being said, the normal adjustment for hydraulic lifters is normally take all clearance out of rocker arm to lifter plus an extra 1/2 to 3/4 turn. I used to do this with the motor running, I would adjust it tighter till it quits rattling and then tighten an extra 1/2 turn. If the lifters are bad, however, the rattling will never go away. I hope this helps.
There is no valve adjustment on a 2.0 engine they are equipped with hydraulic lifters. Try changing the oil and using marvel mystery oil it will usually clean up sticky lifters. If that doesnt clear it up in a few hundred miles you will have to replace the defective lifter
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