i have this problem as of current i am in the prosess of changing my lifters i tryed the flush thing and didnt help i tryed 20w50 got worse went back to a thinner oil much better but still can here it come and go i have a 3.2 dohc 1994 i just ordered the lifters should be here soon very expensive 40 bucks each fot the correct ones for my engine i bought other lifters were the wrong ones they are for a sohc so if anyone needs a set I WILL SELL A COMPLETE SET OF 24 still all in original package for $50.00 plus shipping

 

I'm in the middle of a rebuild 3.2L 94 trooper,blew a head gasket so here I am.
took heads in to get checked, turned out intake rocker shafts had severe wear do to oil injector ports being clogged.The mehanic said this was common problem in these motors.When I picked up the heads he told me to change oil more frequently and it should not happen again.
Should have it running this weekend.

 

I have the issue now My 95 trooper ticks( 280,000mi).. I had the outer lifters changed and it made it little quieter I am thinking of trying the draining the oil thing1st then changing the rest of the lifters and rocker arms but with 280,000 it may be best to put another engine in. anyone have thoughts on this? Thanks