[Killer95GT302]

agree they should and may do it.... all it takes is one blow from being dropped in shipping to put a few thou runout in it.. thats what we cant control..

Or one misplaced armadillo

 

[KEVIN$]

Or one misplaced armadillo

That's how he straightens the cams..

ks

 

[b--rad]

Or one misplaced armadillo

that SOB had it coming!!!!!!!!! and i still dont know how i had picked up the new cam vs the old one when it came time to crack some armadillo shell.... that was a perfect example of a budget thrown together combo by an idiot who had no idea what they were doing, that went out there and made block splitting horsepower.. and never gave a minutes trouble with this stuff we worry about nowdays...

 

[Nitrous SSC]

Okay here you go, I found the video on my phone. This is oil drained (5w-30 M1 synthetic) after a summer of driving (around 3,500-5,000 miles) on my 347 in 2018 that was assembled in 2009. I ran that engine until 2020. Then sold it as a long block to a friend that has since put another 10k on it and dozens of roll race passes with a turbo and 600+rwhp. It's still running great to this day. Had easily 50-60k when I sold it.

 

[Killer95GT302]

Okay here you go, I found the video on my phone. This is oil drained (5w-30 M1 synthetic) after a summer of driving (around 3,500-5,000 miles) on my 347 in 2018 that was assembled in 2009. I ran that engine until 2020. Then sold it as a long block to a friend that has since put another 10k on it and dozens of roll race passes with a turbo and 600+rwhp. It's still running great to this day. Had easily 50-60k when I sold it.

Yea that looks like a paint I'd see on some imports

 

[Killer95GT302]

Popped the valve covers off, took a look around. Pulled rockers off, inspecting everything, redoing lash, mostly all looked good.

This nearly got by me as I was about to set it back on. This rocker has trash around the trunion where the snap ring holds it in. I checked all the others and didnt see anything similar. The trunion and roller move smoothly and freely.

Odds of this bearing eating itself? Did I get lucky? Or red herring.

 

[Nitrous SSC]

My broke valve spring fiasco ended up being a blessing when I discovered that the bearings in my comp gold rockers were failing. Maybe that’s it?

 

[Killer95GT302]

My broke valve spring fiasco ended up being a blessing when I discovered that the bearings in my comp gold rockers were failing. Maybe that’s it?

I hope this would be it, but I have to wonder what the cause is with such low miles. Am I just overloading them, or doing something wrong...

As far as I know Scorpion makes these for trick flow and its not like these sets are "budget". Is there and upgrade I should look into?

While I didn't see the stuff on any others, and they all felt smooth (including this one) it makes me wonder should I replace just this one or all of them.

Anyone have a good reccomendation on a snap ring tool for these? All the ones I have are too big.

 

[Nitrous SSC]

I hope this would be it, but I have to wonder what the cause is with such low miles. Am I just overloading them, or doing something wrong...

As far as I know Scorpion makes these for trick flow and its not like these sets are "budget". Is there and upgrade I should look into?

While I didn't see the stuff on any others, and they all felt smooth (including this one) it makes me wonder should I replace just this one or all of them.

Anyone have a good reccomendation on a snap ring tool for these? All the ones I have are too big.

I went with the hardest core option I could. Comp rockers 1632-16. I’m done doing **** twice.

 

[Killer95GT302]

It looks like those have much bigger bearings since it doesnt need such a large body due to materials.

Ill keep these in mind, I need to confirm if the bearing is indeed going bad or if the snap rings are eating into the trunion grooves for some reason.

 

[GlennSullivan]

It looks like those have much bigger bearings since it doesnt need such a large body due to materials.

Ill keep these in mind, I need to confirm if the bearing is indeed going bad or if the snap rings are eating into the trunion grooves for some reason.

Another big fan of Comp Pro Mag. Ran the same set for 14 years with 3 different engine combos and zero issues. You still need to take that one apart and see what else is going on.

 

[b--rad]

I went with the hardest core option I could. Comp rockers 1632-16. I’m done doing **** twice.

jessel shaft rockers.... best investment ever!!!!!!!!!!!!!!!

 

[Killer95GT302]

Well got to taking this one partially apart, and this trunion has spots in the bearing area that feel like rough cast.

I'm at a loss for how it happened - pitting due to rust? Damaged by valve float? The pattern doesn't appear to be something that would be damage, and the needles all look fine.

Im going to replace this but no clue if this is remotely the cause of my issues, nor if the replacement will be any better.

 

[KEVIN$]

Based on the amount of metal I doubt that is the issue but it's good preventive maintenance to repair questionable parts.

The other idea where the metal may have come from is from the debris of machining the block. If the block wasn't cleaned and brushed through all the ports before assembly then it's possible that is where the metal came from.


ks

 

[Nitrous SSC]

Based on the amount of metal I doubt that is the issue but it's good preventive maintenance to repair questionable parts.

The other idea where the metal may have come from is from the debris of machining the block. If the block wasn't cleaned and brushed through all the ports before assembly then it's possible that is where the metal came from.


ks

My first 347 locked up the oil pump with a piece of metal I have no idea on god’s
green earth how it got into the oil pump because it was too big to pass through the screen.

 

[Nitrous SSC]

Well got to taking this one partially apart, and this trunion has spots in the bearing area that feel like rough cast.

I'm at a loss for how it happened - pitting due to rust? Damaged by valve float? The pattern doesn't appear to be something that would be damage, and the needles all look fine.

Im going to replace this but no clue if this is remotely the cause of my issues, nor if the replacement will be any better.

View attachment 1111008
View attachment 1111007

Just remember you can’t just press in new bearings. The reason the gold comp rockers fail is they lose tension and the bearings start to come out.

 

[KEVIN$]

My first 347 locked up the oil pump with a piece of metal I have no idea on god’s
green earth how it got into the oil pump because it was too big to pass through the screen.

Yea, in my build thread I photo'd a huge chunk of valve stem that came out of an oil passage in my new 4V heads that Livernois didn't get cleaned out...among other crap that didn't get cleaned out.

ks

 

[72 RancheroGT]

It’s hard to tell from borescope pictures but the cam lobes and lifter rollers look rough to me. If all 16 look the same, that could be the source of alot of fine metal.

 

[Killer95GT302]

Closing this one out as potentially inconclusive. I replaced the one obviously bad rocker, it may be one source of metal. Without evidence of anything on the others I haven't disassembled to see if they are showing internal trunion issues.

I crossed into the LS world of investigation as they have issues with hardening of upgraded rocker trunions and the symptoms look identical. Previous valve float issues I had may have contributed.

I think I will be moving towards cam, lifter, rocker upgrade shortly in hopes it cures where its all coming from.

 

[Killer95GT302]

I couldn't leave things alone and took apart a couple more. Looks like I can assume they are all toast, which could explain the amount of crap I was seeing. On with a whole new set!