Originally Posted By: Jim Allen
Originally Posted By: OVERKILL
Originally Posted By: wannafbody
I recently read an article which suggests that EP products can be beneficial to engines as the rocker arms and some other components see high pressures.
I've never seen rockers wear out, even in high mileage and poorly maintained engines
This isn't a challenge, just adding my differing experience to the mix.
I've seen plenty of worn out rockers.. even on well maintained engines. It was pretty customary to wear out the rocker bushings in 60-80K miles on a four cylinder Land Rover engines, for example. I was a LR dealer tech in the '80s and '90s and worked on them back into the '70s. In about 210,000 miles of driving my own Series IIA, I replaced rocker bushings twice. I was a 3K/3mo guy then, pretty anal about maintenance and (though I was pretty uneducated o oils then) most often used 20W50 Castrol or 10W40 Chevron Supreme. My general LR comments would hold true thru the '90s anyway, when my pretty vast experience with them was placed into suspended animation.
Along the same lines, I saw many bushed rocker arms that were worn out in my wrenching career that goes back to the late '60s. Hard to define the cause and effect since I wasn't really looking for any. Most times I was overhauling the engines at the time. Have seen many fewer problems with the stamped rocker with the ball pivots, but even then worn out rockers are not unusual.
Whether this experience means anything in light of today's better oils, I don't know.
Thanks for your input Jim
My experience has been primarily with SBF and SBC's, I've never had a LR apart, so thank you for your perspective from that marque. I didn't realize this was as common as it seems.
On very rare occasions, a rocker would have to be replaced in the taxis, but that was rather rare.
