MR NASTY

iTrader: (5)

Well me and a buddy of mine have done about 8 cams total. all installs ok. Well yesterday me and my friend decided to install another buddy of mine's cam. Well everything went well, lined it up dot to dot, double, and triple checked everything like we always do. so everythings back together and we go to start it. nothing happaned. So we decided to try again and still nothing it would crank over but not start. Just the valve train would move, but wouldn't start up. Everytime we shut it off( from trying to start it up) the RPM and MPH would go up and then fall back down. So we checked the spark plugs and they were all coo. Then the worst!!!!!!!!!!!!!!!!!!!!!!!!!!

We took off the valve covers and notice one of the rocker arms is off to the side of the valve then we notice about 4-5 other rockers exploded( all where torqued correctly. So we tare down everything again but we dont pull the cam out. we take the rockers off and about three of the hardened pushrods are broke in half, and two bent. At this point I almost fainted. we stuck the magnets in the the pushrod holes and rotate the cam and some of the magnets went up and then fell down again, while the others stayed up. ( good thing we didnt pull the cam out) What could of caused all of THIS. I'm hella stressin cause this **** has never happaned before. Could it have been a bad cam or some weak stuff in the motor that just gave out. I know the install went correctly. and remember the Motor didnt even START UP. all this happened and the motor didnt even turn on.
<img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> HELP ME PLEASE!!!

PewterZ

Did some lifters fall? It sounds like a few lifters fell and you just put the pushrods in on top of the cam . Some bent and some just screwed up the rockers. That's were I would start.

<small>[ September 05, 2002, 10:26 PM: Message edited by: PewterZ ]</small>

dand35th

cam size??? sounds stupid, but did the valves hit the pisons and put huge force on the rockers and pushrods???

JPR

Oh Boy! Uhh, just check everything over again and start from scratch? Something else you may want to check also is, in loue of breaking some hardened push rods, I believe you may have compressed a couple few lifters which in it's self is not good.

Good Luck!
Joe.

<small>[ September 05, 2002, 11:32 PM: Message edited by: JPR ]</small>

MR NASTY

iTrader: (5)

i know the lifters didn't fall cause we used the magnets to hold them and they were all stuck. I already have almost everything off. I'm gonna pull the heads off tommarrow, what im I gonna need, and its possible for a Valve to slap a piston didnt hear anything smacking while trying to start it. Its the TR 224 cam.

-Joseph-

iTrader: (12)

Stupid question, but you did replace the valvesprings with aftermarkets right? Don't the stockers coil bind at .530ish or so?

MR NASTY

iTrader: (5)

yup, comp 918s in

Raughammer

"Something aint right..." (no sheet Sherlock)

Either the cam is 180 out and the pistons were hitting valves, or the rocker arm torqueing was'nt done correctly.

Thats all that i can think that would do it.

Rarely is it a mechanical failure rather than a install mis step.

Any chance the cam walked on ya?

Did you turn over the motor by hand a few times when the plugs were out and after the cam/valvetrain was in?
This is a good step to check by hand BEFORE attempting the crank the bad boy up. You can tell a lot with a ratchet on the crank bolt that you cant tell when sitting in the interior cranking on a key.

Man, you got me mighty interested in what the problems cause, ends up being. Please share with us when you find out.

Good Luck.

AndUAndI

Like John said, please keep us posted.

I'm doing my first here in the next couple of weeks (TR224 also with 987's).

Pat

cantdrv65

iTrader: (3)

My guess is the cam was not dot to dot and you had a little piston to valve contact. Not good, you probably bent a few valves as well.

LS171Malibu

PM me if you need any stock rocker arms or pushrods. And Good luck

gwj

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by PewterZ:
<strong>Did some lifters fall? It sounds like a few lifters fell and you just put the pushrods in on top of the cam . Some bent and some just screwed up the rockers. That's were I would start.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">NO offense, but that's a very unlikely scenario.

MR NASTY

iTrader: (5)

well we did torque all the rocker arms correctly and the cam was dot to dot. I checked, my friend check and another friend checked. We always have a triple check. We also turned the cam and everything seemed ok. I pulled the drivers side head today, and all the valves were bent and kissed the pistons(eyebrow marks). how can you tell a lifter is messed up? they looked good to me. only the plastic that holds the lifters broke.
monday the passanger side comes off. thanks alot guys for the help

Scalpel

iTrader: (4)

The cam must have been ground 180* out of phase if it was installed dot to dot, ie: the picture below:
http://www.ls1info.com/article.php?sid=192

up2late76

OMG! i'm installing the same cam in a few weeks, i'm dying to know what happened???

wrencher

iTrader: (2)

Dot to dot? Dowel in cam? Somethin's way off.

Smoke_ur_5.0

iTrader: (2)

Ok guys...let's clear this up again..if you line up the gears dot to dot..you cannot get it 180 degrees off.

TUFFLS1

maybe cam was miss pacaged and you installed a bigger cam

Scalpel

iTrader: (4)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Smoke_ur_5.0:
<strong>Ok guys...let's clear this up again..if you line up the gears dot to dot..you cannot get it 180 degrees off.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Very true, however a cam can be ground 180 out of phase. I've seen it happen on the CorvetteForum. However, it didn't chew up pistons, valves, etc the car just wouldn't start <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> He found out the cam was ground 180* out-of-phase.

Smoke_Ford

Another overlooked possibility is that there was a mis-shift. On the LS1, it is common that If you miss a shift with a 6-speed that you can bend a pushrod. If you got a new cam, that could be why you shattered a few of them. In this case, starting from scrath will fix it. Get new pushrods anyways. Also, if it is an auto, you can still ebnd pushrods but it is harder. Are there any other mods? Is there a stall, could depend on a lot of things.