After adjusting it would be normal for the lifter to bleed down and to be somewhat loose, not to the point the rocker is flopping around.
When engine is started, lifters should be pressurized and quiet.
I am not sure (short of looking at camshaft) how you would know if lifters are correct.
You may have to contact previous owner and get more info.
The fact that they are falling off indicates a lifter/pushrod problem or a lack of lubrication to properly pump up the lifters.
Wednesday, June 3rd, 2009 AT 8:11 AM