SSDoubleK

iTrader: (100)

Thanx for all the insight, going out to the garage tonight to tear the car down again. Any more questions, you all will be the first I run and ask.

XtrmLS1spd

iTrader: (6)

I imagine that you are going to follow the guide for the re-installation of your heads. So, my advice to you is to be sure that you torque them down in the correct sequence, as it should state in the manual. Grab a marker and draw straight lines on the head bolts and follow the instructions on the sequence. This WILL save you more heartache.

FstBlkz28

iTrader: (13)

I'm part way thru my cam install and this thread has scared the living sh*t outa me ... is there anyway to make sure that both your crank and cam are on TDC at the correct intervals?

AKA ... say I set the cam gear and crank gear dot to dot. Put the pushrods in, but not the rockers, and then leave the spark plugs out and put a straw or somethin in the #1 cylinder to verify when the piston is at TDC and by the motion of the Pushrods to see if the valves would be open or closed?

eallanboggs

iTrader: (1)

If your going to do this job your going to pull the rocker covers anyway and that's a good time to find TDC for #1 on the compression stroke. Back to basics: I C C E is the 4 stroke cycle. You can watch the rockers for #1 to get into the ballpark and once your in the ballpark finding home plate shouldn't be that hard. Once the "I" rocker for #1 closes the piston is going to start to travel upward on the "C" (compression) stroke. I use a wooden chopstick to find TDC. 1/2"drive rachet in one hand and the chopstick in the other. Once the chopstick tells you you're at TDC you should be DOT to DOT or very close to it. If your not perfect when the chopstick stops moving vertically you can make the needed tiny turn of the crank to get exactly DOT to DOT. The plugs are already out I hope so turning the crank is easy. If you don't want to go through all that trouble you can just turn the crank and watch the dots if you have the front cover already removed. You can only be 100% right or 100% wrong. Your dots are either at 12 and 6 which is DOT to DOT OR 12 and 12 which is 100% wrong.

2xLS1

iTrader: (25)

Cam dot at 6 or 12, it doesn't matter. As long as the crank dot is at 12, the installation of the cam will determine if it is at the top of compression or exhaust. Here you go. Put the crank dot at 12 and the cam dot at 12. Now pull the cam. Reinstall the cam with the cam dot at 6. IT DOESN'T MATTER. As long as the crank dot is at 12, you can reinstall the cam with the cam dot at 6 or 12. It's just easier to line them up with the cam dot at 6. You don't need to feel for TDC through the spark plug hole. JUST MAKE SURE THE CRANK DOT IS AT 12. That is the dot that is hard to see.

eallanboggs

iTrader: (1)

2XLS1 is right. Once the camshaft comes out the timing goes out the window with it. So as long as the crank DOT is at 12 you can put the DOT for the new cam at either 6 or 12. You will be at TDC on "E" stroke when the cam DOT is at 12 or at TDC on the "C" stroke when the cam DOT is at 6 as long as you do NOT move the crank. Either one is OK. I was just trying to keep things a little consistent since bent valves and even broken rockers can be the result if those two little seemingly insignifigant DOTs don't meet each other at the right point.

roccox

Did you pull a spring that is sitting lower off and look at it? Seems it might be easiest to try checking one of the springs first, maybe you might be lucky, since it does seem like it was timed right...

777

iTrader: (21)

I guess you guys missed this. That is your problem. My guess would be that the springs hit coil bind which = broken rockers. Broken rockers = bent valves. Bent valves = 1 messed up engine.

gearheads78

iTrader: (29)

I'm with 777 on this one. I did not catch that part. You were able to turn it over by hand because the push rod would slide in the lifter allowing a little more clearance. As soon as you started it oil pressue goes up and you have full lift which = coil bind. The hardend pushrods don't give so rockers break and you have your chain reaction from there.

Chalk this one up to expensive lesson learned. Good luck getting it back together. Post up if you are not sure of a step. Someone here can always help.

Brandon Boomhauer

iTrader: (10)

Something to think of too... The thought of the lifter giving a little more never crossed my mind, but makes sense.

someone want to enlighten the post with rocker arm tq procedures?
I was thinking 22ftlbs no sequential order.... They dont have any adjustments, so why would you need to go in a special order?

Krab

iTrader: (28)

I was wondering why no one had mentioned him starting his engine with the new cam and stock springs. I would imagine that would be why some of his valves are bent also. Doesn't matter now, he has to take off the heads and get some new valves. Lesson learned, don't run your aftermarket cam with the stock springs. Hope everything turns out ok.

What are the stock springs rated at?

Brandon Boomhauer

iTrader: (10)

somewhere really close to what the stock cam is, and not much more.

MSGHUFF

iTrader: (7)

Did you buy the cam used? If so, are you sure it is what you think it is?

schultzsj

iTrader: (1)

It probably is coil bind as has been mentioned but it could also be that the new pushrods are too long (too much to read through again but did you say that you installed aftermarket pushrods?).

Steve

GuitsBoy

iTrader: (4)

I was also going to bring up the stock valvespring issue. Depending on the cam lift, the springs could reach coilbind. You would have been able to crank the motor by hand because the lifters were not all pumped up, but once they pumped up when you started the motor, you probably bound the springsand popped off the rockers.

SSDoubleK

iTrader: (100)

Okay, I have removed both heads, cleaned out all rad. fluid, used paper towels, and have found I have bent three vavles on the driverside and three on the passenger side really bad. Next question is found a large carbon buildup on the piston rings, so I cleaned them, hope that was okay. Also found something that has me wondering, piston rings have a circle in them, like the valves have hit them. Didn't seem like really a big cut into the rings, but enough to concern me. Is this okay?, or did I do more damage, hope I do not have to dig any deeper into the motor.. Thanx.

SSDoubleK

iTrader: (100)

Cam is brand new, Lunati 221/221 558/558 114 L.S.A.,pushrods are stock length 7.4 and comps hardened ones.

2xLS1

iTrader: (25)

Piston rings go around the circumference of the pistons. I'm guessing you are talking about the piston tops. Your piston tops have circles in them from the valves hitting them. What do you think bent the valves? Depending on how deep the indentations are, you may or may not have a problem with the pistons. Some just smooth out any sharp edges and run them like that and others will tell you to replace them. They will probably be weaker in those spots.

SSDoubleK

iTrader: (100)

I understand what was hitting the piston ring, just needed advise on how deep of a cut was okay into the ring. Remember I'm asking for help and knowledge, not belittling, I'm no expert, but I cannot learn if I do not ask the question. Thanx

2xLS1

iTrader: (25)

I was not trying to belittle you. Reread your post. You were asking how you got circles on the piston tops. The top of the piston is not the rings.