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Yeah, I'm not in engine-building mode yet...

I'm going to be super-pissed if there is a widespread problem and it's not taken care of.

If there was a problem at the machine shop, they should cover the cost of correcting their mistake. If there was an issue with the design/drawing/dimensions (which I'm assuming Marc provided)... well... sucks to be him.

heavywoody wrote:Yeah, I'm not in engine-building mode yet...

I'm going to be super-pissed if there is a widespread problem and it's not taken care of.

If there was a problem at the machine shop, they should cover the cost of correcting their mistake. If there was an issue with the design/drawing/dimensions (which I'm assuming Marc provided)... well... sucks to be him.

likewise ...

[quote="3X00-Modified"]It wasn't that much material removed, but I'm hoping the filter caught it all... As far as the pump they are quite tough and I doubt that caused any issues.

Yes I know, it's just one of my main fears. Oil pump failure is number one and number two is coolant in the oil.

Its not a lot of material loss to stretch it like that. I highly doubt there will be any oil pump issues.

Super bummer though. Something is up. I'm interested to hear the analysis.

Well my own personal analysis... The gear was cut wrong. You cannot wrap the chain around the whole cam gear without having to pull it in place and you can see it stressing to fit into the gear...

I tried to fit my second chain around the cam gear and it is just off, the stretched one fits the sprocket perfectly and the rollers touch the base of the gear.

And Barry I'm not concerned about material from it stretching I'm concerned about where the chain rubbed the block and left grooves on the dampener mounting bosses.

Two words: JB Weld.

Jon, the set I just installed in my 3500 is from the same batch as yours (the last batch) but the other one I have is from an older batch (the batch that had the TCE logo engraved on the cam gear). That one is in my closet and I can take whatever pictures you need if that help. I cannot take pictures of both of my set together tho as the other set is already in the engine (Looks like I might have to take it out anyway... :/).

Balls. I'd be super pissed...

Here is pics of a set from a previous batch. From what I remember, I feel like the gears aren't cut as deep on this one ?...

If they are not Cut as deep on the older set that completely explains the issue.

3400tZ wrote:Here is pics of a set from a previous batch. From what I remember, I feel like the gears aren't cut as deep on this one ?...

Fully wrapped like this does it feel like the chain is bottoming out on the sprocket ALL the way around? Because it does not feel that way on mine... I have to pull it tight in on each side to get it to get the rollers of the chain to bottom out on the sprocket.

Also does the back of the cam gear have the slot cuts in it where it rests against the cam retaining plate? Mine doesn't have those slots and I think that is very bad for oiling since most of the oil the chain should see would be overflow from the front cam bearing and without those slots it's hard for the oil to make its way out there.

ugh damnit

I wish I had a freaking battery for my caliper :/ The teeth seems to be about 4.5mm deep and from one tooth to one on the other side (see picture) is 116mm. What do you get with yours ?

I'll measure it tomorrow but it's definitely wrong... No slots on the back side of mine either....

Try this with your sprocket

New chain



Badly stretched one that now fits the profile


Also other pics.







Slots on back of GM sprocket

Mine is doing like your stretched one, fit fine on the sprocket. The one in the pics above that is, from a previous batch. I guess the one in my engine (from the same batch as yours) is just as fucked as yours. Does Mark plan to replace the sprokets or something ? I guess I have to take it back out now, damn it!