Z

Just to clarify exactly what's in the first picture of this thread, is that an exhaust cam lobe on the 5-6 cylinder bank, being looked at from the front of the engine?

heinrich

Z, correct. Those pix are 5 and 6 second exhaust lobe.

From what I can see without turning the engine more:

3, 5, 6, 7, 8 all have damage to the second exhaust lobe (and lifter), and some of those show damage to both exhaust lobes and lifter,

All damage is on the trailing edge of the lobes, except perhaps 6, which seems to be pretty much on the peak.

heinrich

How usable would these be? They are not the GT cams. They appear to have no damage, but there are feint discolorisations across the bearing surfaces, maybe wear? These cams are dry. The apexes appear to be in excellent health. I don't know cams well... thoughts from cam experts?

Cosmo Kramer

I am no expert, but I would say they look OK. Looks like the journal is just polished from the bearing. I would double check by measuring them. Lobes look good.

928er

you could do a base circle grind on the s4 cams and have a better profile than the GT... it would be worth thinking about.

IcemanG17

H
I have a set of S4 cams you can have for free...........granted its not ideal, but free is free

Did you check the rod bearings when you installed the pan? With that much metal missing, some of it must have gone through the bearings....

heinrich

Sterling, thanks ... didn't know that. Brian, thanks, I may need those

heinrich

Andy, looking at specs, this may actually be a very good option for me. GTS lift is at least better than S4, though I know the exhaust cams are supposedly not good at all, more than just lift. Do you know how much lift your cams offer?

I think I should take you up on this very generous offer thank you

dcrasta

This is what I was thinking. Changing Oil once a year? Even if you don't drive oil breaks down from contact with air. Things evaporate. Not good.

karl ruiter

Not sure what I am missing r.e. rod bearings. Oil from the heads goes back down to the pan and from there to the pickup, oil pump, and oil filter before going out the the bearings. I would think the oil filter would remove any metal residue that did not just sink to the bottom of the pan.

Unless the concern is just that the oil used was not up to the task and thus the rod bearing are suspect. But it seems that this is more of a GT cam issue and less of an oil issue.

Not to say inspecting the rod bearings would be a bad idea if the motor is out on a stand. You would not have to replace them if they look good, so you would only be out the nuts for sure.

Randy V

Have you requested a refund from the seller?

IcemanG17

This really isn't a bad idea.....you did pay TOP DOLLAR for this motor, since it was advertised as excellent..... I would discuss it with Larry.....

heinrich

Randy, Brian ..... I did call him when I found the damage, and did request that he do right by me. He said he would think about it.

86'928S MeteorGrey

Can a set of 86.5 cams be modified to work? They might be easier to come by...

Randy V

That doesn't sound promising.

Dude is looking at a Douche of the Year Award if he doesn't step up.