OP
OP
iamdub
Full Access Member
Finished the 5K service yesterday.
Popped off both rocker covers to inspect. Not sure what's up with some of the rockers being darker. They're the originals and maybe they were on other cylinders. But, I swear I kept them all in their original positions. It appears to just be oil staining as it wiped off. :
These are the 3/8" push rods. They were really close, but cleared when I tested them on the stand. Apparently, they still clear with the engine at 6,000 RPM. Minimizing flex is the point of fat rods, right? :
I wanted to swap in sturdier rockers since I'm running the originals. Back in 2010ish, I had some ~20K-mile rockers fitted with a Comp trunnion upgrade kit. I never finished that build, sold the motor and those rockers sat on a shelf for 9+ years. A couple years ago, I put them in my brother's truck since his were damaged from loss of oil pressure. Not long after that, I stumbled across a bunch of old horror stories of how that Comp kit was failing- the trunnions were getting chewed up by the bearings, possibly from improper hardening. The issue seemed to be from around that time period. Playing it safe, I swapped 'em for some new OEM ones I had slated for mine. He only ran 'em for about 10K miles. Yesterday, I took a couple apart to inspect and saw what I believe is the beginning stages of the aforementioned failure.
The top/low-load side appears fine and you can see the band from where the needle bearings ride:
The bottom/high load side is definitely worse. There was some pits (ignore the paper towel fibers) in the bottom centers that I could feel when I lightly drug a razor blade across them:
I decided to not use them. I'll be getting something else, if not just another new OEM set.
Popped off both rocker covers to inspect. Not sure what's up with some of the rockers being darker. They're the originals and maybe they were on other cylinders. But, I swear I kept them all in their original positions. It appears to just be oil staining as it wiped off. :
These are the 3/8" push rods. They were really close, but cleared when I tested them on the stand. Apparently, they still clear with the engine at 6,000 RPM. Minimizing flex is the point of fat rods, right? :
I wanted to swap in sturdier rockers since I'm running the originals. Back in 2010ish, I had some ~20K-mile rockers fitted with a Comp trunnion upgrade kit. I never finished that build, sold the motor and those rockers sat on a shelf for 9+ years. A couple years ago, I put them in my brother's truck since his were damaged from loss of oil pressure. Not long after that, I stumbled across a bunch of old horror stories of how that Comp kit was failing- the trunnions were getting chewed up by the bearings, possibly from improper hardening. The issue seemed to be from around that time period. Playing it safe, I swapped 'em for some new OEM ones I had slated for mine. He only ran 'em for about 10K miles. Yesterday, I took a couple apart to inspect and saw what I believe is the beginning stages of the aforementioned failure.
The top/low-load side appears fine and you can see the band from where the needle bearings ride:
The bottom/high load side is definitely worse. There was some pits (ignore the paper towel fibers) in the bottom centers that I could feel when I lightly drug a razor blade across them:
I decided to not use them. I'll be getting something else, if not just another new OEM set.
