Trance's all motor disaster
11-21-2005, 02:00 AM
#43
3.0 BAR
Join Date: May 2003
Posts: 5,380
Re: Trance's all motor disaster
Originally Posted by Joseph Davis
I've got a spare Z6 head, it's in okay shape but kinda dirty with some buildup. I've already promised Minor Threat the factory retainers, but you can have the rest if you need it.
Sorry to see you have shitty luck. keep your head up man.
11-21-2005, 02:38 AM
#44
0.0 BAR
Join Date: Jan 2005
Posts: 0
Re: Trance's all motor disaster
keep everything hush hush and atleast try to get another cam for nada.
That is not a major seize, I've seen alot worse.
Might wanna drop the pan and check the pickup to see if it clogged.......
----, drop pan, pull head, might as well yank the whole motor!!!!!
The valves kissed the pistons, that is for sure. I could show you a result of a Ford Dart block guy who did the same thing, only later the piston came apart from a fracture in the wrist pin area.
He split a DART block, something even DART never heard of!
http://bbs.hardcore50.com/vbulletin/...ad.php?t=29657
That is not a major seize, I've seen alot worse.
Might wanna drop the pan and check the pickup to see if it clogged.......
----, drop pan, pull head, might as well yank the whole motor!!!!!
The valves kissed the pistons, that is for sure. I could show you a result of a Ford Dart block guy who did the same thing, only later the piston came apart from a fracture in the wrist pin area.
He split a DART block, something even DART never heard of!
http://bbs.hardcore50.com/vbulletin/...ad.php?t=29657
I had a set of valve springs I bought months before my cam and I hadnt really learned about spring pressures then. Well, needless to say, the valves floated, smacked the pistons, bent the valves. So, I replaced the valves, the pistons had marks on top of them, but looked fine. Well, then I got the pressures from Ed, and these springs werent even close. The Comp ones I had were 165#@1.800" seat, 385#@1.200" open. He said I needed about 425# open, so thats why they hit. Anyway, we replaced the valves, springs, and put it back together. We never tore down the short block, and what we think happened is when the valves hit, it busted up a couple of pistons around by the pin. We never saw it, cuz we never pulled the pan. One piston disintegrated, I have another that looks fine on top, but is all broken up around the pin. We figure it just at itself up, wiped out 1 Carrillo billet rod, and also apparantly cracked the cylinder skirt. The marks in the cylinder are from the piston breaking up, doing the math, it was a powershift from 2-3, 6800rpm. At that rpm, that piston went up & down 113 times in 1 second, thats alot of beating in that cylinder. So now I get to have it sleeved. I could cry.
11-21-2005, 03:07 PM
#45
3.0 BAR
Thread Starter
Join Date: Mar 2003
Posts: 5,282
Re: Trance's all motor disaster
Thanks guy's for all the help and offers for parts etc. Your all good in my book. Hopefully tomorrow I'll be able to get to work on it after work. I'll let you all know whats up with it.
11-21-2005, 03:58 PM
#46
0.0 BAR
Join Date: Nov 2005
Posts: 20
Re: Trance's all motor disaster
Looking at the pics mate i'd say that the cam broke as a result of the pulley retaining bolt being too short!!! Look at the pic of the pulley in your hand and look at the thread left in the broken cam hole.....
11-21-2005, 06:44 PM
#48
0.0 BAR
Join Date: Nov 2005
Posts: 20
Re: Trance's all motor disaster
I'd bet my ***** on it! It may be a stock bolt but it ain't no stock cam wheel is it? To prevent this happening again before installing the pulley measure the depth or the threaded hole and the length of the bolt, fit the longest bolt possible so it goes right into the first bearing on the cam then even if there is a flaw in the casting the bolt will be acting as an anchor. Just make sure the bolt isn't too long or you'll have another fucked cam and wheel!
12-11-2005, 05:17 PM
#50
3.0 BAR
Thread Starter
Join Date: Mar 2003
Posts: 5,282
Re: Trance's all motor disaster
Back up to the top again fellas 
I got a Y8 head for $30 thanks to a kind local, sent it out to the machineshop to be cleaned up, machined, and get the valves cut, and today I put it all back together. She runs great again!!! I have to find an adjustable cam gear and a Y8 dizzy because using the Z6 distributor the timing is a bit too retarded. But it runs good on stock parts for now until I can snag another cam gear and hopefully another aftermarket cam. 
I got a Y8 head for $30 thanks to a kind local, sent it out to the machineshop to be cleaned up, machined, and get the valves cut, and today I put it all back together. She runs great again!!! I have to find an adjustable cam gear and a Y8 dizzy because using the Z6 distributor the timing is a bit too retarded. But it runs good on stock parts for now until I can snag another cam gear and hopefully another aftermarket cam.
