Jeremy, what do you think caused the cam damage?

While you ponder, check out this swap.

 

I think the cam damage came from when the #1 rod took out a lifter on the #2 cylinder and parts were just bouncing in there on the cam, being worked around by still moving parts. Or the busted rod on the crank still flailing around may have smacked it.

Thanks for the link too. That guy did it in a month, but with 2 weeks off from work. That's encouraging.

 

Do you see physical evidence of that? That sounds a bit odd unless you see what caused it. Could there have been a cam failure first, whether by failed lifter or whatever?

 

Yeah, I could see it for sure once the cam came out. Click on this picture below, and you can see the missing lifter from the #2 cylinder. I think when the oil jet got knocked off, it along with some other parts got bound up in the cam and took out the lifter.



Also, at the bottom in this picture of scrap I found in the oil pan, you can see the roller of the lifter in the center and the pieces of the oil jet to the right of the lifter.

 

any interest in selling the hpop?

 

Just thought I'd give you guys a bit of an update. A buddy of mine was over today and looking at the busted parts, when he noticed something that I had missed. On the rod that broke, when looking at the end of the rod that's still connected to the wristpin, he noticed that the rod had been cracked for quite some time at the edge, as indicated by a very dark line at what would be the top/bottom of the I. The metal color lightens up a lot as you move on down the I to about halfway down, but still evidence of a crack before where you can see that it was pulled apart.

Look at this photo, click on the thumb, then go to the Full Size link near the top right of the page, and you can see what I'm talking about. The "I" is turned sideways here, but the crack starts on the left side here.



So, it appears that this rod was damaged for quite some time and the larger injectors simply finished it off. I carefully examined the other rods, and none of them showed any cracks. What caused the crack? Your guess is as good as mine, but given how dark the metal is at the very edge, it's been there for a long time. My guess, it was a flaw in the casting from the factory.

 

Jeremy, that is tough to make out with the lighting and all but I think I see what you are talking about. At any rate, that is a pitterfull sized rod in the first place. Need to look at those things from time to time and remember I have PMRs.

 

Hmmmm, very interesting! I see what you mean....the initial crack/tear in the rod on the left side...it looks like the initial crack went about 1/3 of the way across the rod, if I'm seeing things right in the pic. That's crazy, but hopefully gives a little confidence that it was a fluke, and not the standard HP capable level (434HP) for the forged rods?

Lord knows I don't want to be the next victim!!!

Can't believe Mr. Analytical missed that

 

I thought you might like to hear that. I talked to Brian at BTS yesterday, and he couldn't figure out why a forged rod gave up at that power level either. His wife's truck has been living at ~525 HP for over 2 years on factory forged rods, and it's a DD for her.

Yes, I did indeed miss that. My state of mind during the teardown wasn't the best, and I honestly had never seen a torn rod before, so I may have looked right at it and had no idea what I was looking at.

 

A tech in the CAT shop at Vegas demonstrated a quick way to check for hairline surface cracks using a spray can of brake cleaner. Just spray the part and watch, and enough extra brake cleaner penetrates a crack so that it's still visible after the rest of the cleaner evaporates from the surrounding surface!

BTW, I'm still in Springfield and probably won't get to Lake Ozark until the last week in May, I'll let you know by email.

 

Jeremy,

Have you heard any new news on why Kevin's (mech2161) Powerstroke blew? Have'nt seen any recent posts on PSN about it myself.

 

Gene, that sounds good. I should still be here. No plans now until late June. Interesting tip on the brake cleaner. I may have to go try that on the other 7.

Rich, Kevin's didn't actually blow, it was a sort of false alarm. Once he tore into it, he found a single bent pushrod. There is a thread titled "ENGINE UPDATE" over there where he talks about it. He's trying to have it running again by this weekend, with stock push rods for the time, then some upgraded ones after that.

 

Come on Jeremy, im drooling to see a pic of that new engine in it's new home!

 

I'm waiting on the Destroked parts right now.