Bent pushrod? 2004 4.7L WJ
Temps dropped into teens and my water pump died. Not having garage to work in, I took car to local mechanic. After R&R of the pump, he tells me he thinks I have a bent rod - hears too much tapping/slop in valves...says this is 'common' on the 4.7L mine has 85K miles on it.
My brother has identical car/engine. I listened to both...I can't hear a difference.
So,1) how does one diagnose a 'bent rod' w/o tearing off the valve covers and removing the push rods?
2) what would be the most likely cause of bent push rod? (for this version of engine?)
Things in know of include sticking valve, sticking lifter, wear on the arm, and fuel hydrolock...but...this engine has never been abused, maint on plugs, oil chg, etc done on schedule (5K oil, 30K plugs)...
Aside from a 2nd opinion, I want to be a little smarter about this, so any experience info would be really useful
I even hate to ask....price range to R&R?