Z6 Head damage
 

Attachment 10014
I was going to install my Zex cam and noticed this when I removed the stock Z6 cam.
:7

Re: Z6 Head damage
 

ouchie!

Re: Z6 Head damage
 

I have a cheap d16z6 head. Little bit of surface rust from sitting on the shelf forever. Its just the head which from the looks of it is all you need. Cam caps,valvetrain all there.50+shipping its yours

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I appreciate that Chris, I was going to ask you if you had any spare cores, then I remembered that this head was ported. :'(

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worst case if the grooves are to deep to get honed out, pm me

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Attachment 10011
Attachment 10012

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I will. Thanks .

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What are your thoughts on the possible cause? Oil pump FTL?

Re: Z6 Head damage
 

The cam caps were not mismatched and this is the second time that this has happened. The other time it happened the cam seized and sheared the cam gear off.
So this head is a different one but the same problem, Im thinking that the egay oil pump Im using is not uo to par.
I may just get an OEM pump and modify it to Endyn write up specs.

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Oem pump for the win. Was the damage on the same cylinder before?

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Gotta check, good question.

Re: Z6 Head damage
 

Attachment 10010

https://www.homemadeturbo.com/forum/...opic=64299.150
I think so. :-[

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Also go steal scotch brite pads from the kitchen and see how deep those grooves are

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Not exactly grooves, but feel more like excess metal on the cap itself. Bad part is that it actually has a ridge or a lip on he one in the pic almost as if the cam wore the cap down some.
What are your thoughts on it being the same cam cap as before?

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Damn Joe that sucks. I think I can get you a cheap head local. Might be time to send a head off to Chris(Xeno) friend for a really bad ass port job. ;)

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>:D

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WHOA THE ---- UP THERE.

You might want to consider pulling the engine and putting new bearings in it. Last time I saw a weak oil pump the #4 rod bearing (furthest from pump) was on the slow road to destruction.

Re: Z6 Head damage
 

Yeah, Im going to pull the motor and inspect the bottom end. Thanks JD.

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Hot not.

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Joe come by and help me drop the motor.

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---- that blows...

So same bottom end and oil pump as the last time the cam snapped (this happened pretty quick after startup right?)

Then you changed heads to this aftermarket Autozone cast special (that had somehow been ported)? Car ran for a while but still damage on the same cam journal...weird.

As far as getting a Z6 head ported from Belben, that may be a possibility, but you might get a better deal and quicker response getting one from Chris (the mod).

Re: Z6 Head damage
 

Thats ture Chris is super fast with everything he sells.

Re: Z6 Head damage
 

Attachment 9978
Gonna tear it down and inspect the bottom end. Im going to modify the oil pump, and possibly p/u an OEM pump (which will also get modified).
http://www.turbod16.com/viewtopic.ph...t&sd=a&start=0
Ill take the head to the machine shop to get a figure on the cost to repair the head I have. Im glad this isnt my daily driver any more. :)

Re: Z6 Head damage
 

Yes, same bottom end, and the other head seized the cam fairly quickly. Yes, this head is definitely ported. Same cam journal, maybe oil pickup/oil pump, clogged oil passage? :-\
Let's see if this head is salvageable, if not Im gonna hit up Chris.

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Bottom end looked really good. My machine shop said no good on doing cam bearings, so, Im gonna scotch-brite the journals and plasti-gauge the clearances.

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No good :X

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i had this happen to my z6 head few years ago, my question is... did you torque the caps to the spec in the manual or did you just tighten em up and call it good? the reason i ask is my dumb ---- buddy over torque mine and this cause my cam to do the same thing as yours. car was idling fine and then all of a sudden it died and snapped the key on the cam gear. damn thing siezed up. took apart and cleaned journals up with a scotch brite (green one) and checked the clearence, worked out ok for me.

Re: Z6 Head damage
 

Drill out the oil metering orifice in the block, most likely it has some sludge or debris partially clogging it. A tiny bit more flow won't hurt anything, and will ensure the passage is clear.


I know this sucks, but it's better that you found it now instead of the engine coming apart on you and destroying a lot of ----. :y


Saw that happen to a local A6 with a Gude head/cam package. I just figured it was due to not so Gude parts.

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The caps were torqued to spec.
Im going to look into cleaning/boring the oil orifice. Also, I contacted J&C Cyl. Head of West Virginia and they will align bore it for $150 and install cam bearings.

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Cam bearings? Hrm, do you have contact info?

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J&C Cyl Head Exchange 612 Virginia Ave Fairmont West Virginia Attn. Rob (800) 266 5599

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i think chris fucked it up. he's just trying to get you to be a repeat customer. hahaha shitty situation tho man definately pick up an oem pump at least it'll help extend the life of your motor

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Do you guys think after I install a new Honda oil pump and repaired head, I should use a stock Z6 cam for the first hundred miles or so?
Meaning that, I want to check and see if the problem has been corrected or not. If the cam gets seized, then I would not ruin a new Zex cam. ::)

Re: Z6 Head damage
 

if you do that i'd definately take a look at the cam itself and see if there's any burrs or anything on the main of the cam. it would suck to toss that cam back in a new head and have the same thing happen to you. also maybe just check and see if the cam is still straight or if it's bent at all. depending on how long it was in there while that was happening you may have worn down the cam itself causing it to move around inside the journal....if that makes sence

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I would.

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+1 would suck to waste more on another one.

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Looks like it overheated to me. If it is the center journal, I'd be willing to be it was overheated. When heads warp, the center comes up, and the outsides go down.

Do yourself a favor, degrease the journals and the cam. Lay the cam in the journals, and rock it back and forth. You'll see just how bad it may have warped.

Re: Z6 Head damage
 

Overheated by lack of oil I presume. The cam did rock back and forth on the center journal.

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Then again, the head may not have overheated due to oil starvation, it is a possibility that the engine did get too hot at some point.

i had the same problem on my b17 engine the bearings are gone and the head was just like that i took it to a really smart guy at a machine shop and he polished it up and i put in some sythentic oil and it runs great changed the block with a ls one.