[Cliff R]

"Cliff, I believe you had a similar set up to mine with the OF Hydraulic roller cam and Crower Solid roller lifters with lash at .006". I'm wondering if this combination is putting more load on the valvetrain due to insufficient clearance ramp, what are your thoughts?"

I ran two sets of them with the "hybrid' deal and they both failed in the same fashion.

This was around 2009-2010. We got the rockers in a "package deal" from Dave at SD Performance. He did a couple of sets of CNC ported heads for engines I was building, one was my own 455. They looked like well made parts, pretty much a "copy" of the Crower Enduro rockers. I noticed a minor issue the first time I checked the valve lash but continued to use them. When I slipped the feeler gauge in to check clearance it would go tight and loose as it tried to roll the roller tip.

What I was seeing at the time was the pin getting a flat spot worn on it and possibly the inside of the roller going out-of-round.

The next thing I noticed was some metal "paste" on the magnetic drail plug at the first oil change.

It took a while but the valve train started getting noisy. So i made adjustments and it quieted right down. Then the noise would come back so I decided to pull all the rockers and found that all of them were worn in the same fashion and some had started to develope a LOT of slop between the pins and rollers, so I replaced them.

One has to consider that IF you have a hydraulic roller set-up the travel in the plungers is going to take up the slack between the rollers and pins and you will NOT get any noise, at least not right away.

I'll bet there are many hundreds of these rockers in service that have wear on the roller/pin end of them and the user doesn't even know about it.

I made PRW aware of it and they admitted they knew about it, but also said that they made changes to correct the issues. I had actually sent mine in for inspection, never got them back, never got a new set either, so moved on........FWIW.....