Super Slow Z

No problem man.

orangeapeel

iTrader: (18)

You saw the nissan thread right? I was just trying to make sure we werent about to go down that road again.

Silvy6.0

iTrader: (5)

I hate these threads. People get mad and try and put the blame on someone else. I think it should either be deleted or rewritten.

Super Slow Z

Ha, I lurked that a bit. I can understand wanting to keep things from escalating. FYI to anyone thinking I am trying to badmouth TR, the next cam I put in the car WILL be from them. Just kinda want to pinpoint what it is that toasted the current one so I don't have to go down this road again.

I was in pretty good spirits about the whole thing...but Fedor just suffered his first real loss. FML I should've stayed in bed.

orangeapeel

iTrader: (18)

Nah, its alright. I let Shane know about it. He will respond probably sometime tomorrow.

Super Slow Z

The people who do so are not the ones I'm looking for advice from anyways....edited the OP.

orangeapeel

iTrader: (18)

Werdum is a BJJ masheeeeen though.

bigfatls6

iTrader: (34)

Futural had a bad run of the f13 cams a few years back and it was actually the material in the cam. It could be a few different things though. It could be the lifters failing also.

B Layton

iTrader: (-1)

This happened to my car after 1750 miles, the shop wouldn't stand behind there work it cost me $2,300. then when I got the car back the rear main seal was leaking????????? they wouldn't stand behind that ether, I could on and on about this shop.

orangeapeel

iTrader: (18)

Was that just on 1 lobe?

Unaffliated Racing

iTrader: (15)

I'm going with the use of synthetic oil. Yeah, I know the first thing all of you are gonna say is that many LSx cars come with synthetic from the factory. Thing is since I have worked for THE cam manufacture, it's not an uncommon problem. The oil is too slick and the lifter doesn't roll, it starts to slide and creates excessive heat...... nuff said

B Layton

iTrader: (-1)

Yes just one lobe

JB_97ws6TA

iTrader: (6)

that doesn't make any sense, heat is created by friction if the roller doesn't have enough friction on the lobe to roll than how on earth would it have enough friction to create that much heat unless the roller was already partially seized or had some excessive wear perhaps due to excessive valve spring pressure? I find it hard to blame synthetic oil for accelerated wear at least for the argument of not enough friction.

vettenuts

iTrader: (4)

You need to do some basic checks. I would get the cam hardness tested. What were the valve springs being used? Check their stiffness, especially the ones in those two locations.

69LT1Bird

iTrader: (1)

I will throw in wrong lifter preload as a contributing factor. To little and the lifter will start sliding or not have enough pressure to hold it down on the cam hard enough. Too mush and stiff springs may cause the lifter to pound on the cam lobe. Just some guesses.

elias_799

iTrader: (8)

you turned that roller lifter in to a flat tapped

formulakid1

I don't think a Rockwell test would prove anything at this point.

I am sure that the damage has been carried completely around the affected lobes and therefore you could not get a good reading from it.

The other lobes would probably check out fine since they are ok any way.

Just my .02.

Also, I have noticed the same type of damage on some the higher mileage cars that I have done heads and cam swaps on.
These cars were stock and were running a syn. oil. (I know because I always have the customers bring me the oil)

I don't think I have seen one running conventional or a syn blend hurt like that(but I am working off of memory here).

Once more.....just my .02 .......I'll go back to lurking now...........

garygnu

hardening does not come off,it is not a coating the metal get heat treated to harden it.maybe it was not harden properly.I believe valvevoline racing oil has the zinc in it still.could be lack of spring pressure,springs loose their strength after awhile.ask Jon Bauer he'll tell us what really happened.

Jim_PA

iTrader: (9)

NOT ANYMORE!!!

Gotta look at tractor oil, additives, or "racing" oils.

cookseyb

It's called "Brinelling" and caused by chatter. Possible broke-weak spring. bill