GeorgeC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 1 Bad Z:
<strong>[QUOTE]GeorgeC, was that a Lunati or CompCams cam?

I have a stock cam sitting next to my tool box that I check EVERY aftermarket cam with before I install it now.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">It was one of GTP's grinds, which I think was ground by Elgin Cams.

Good to see I'm not the only one with that kind of luck... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Ryoga

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TA_2001:
<strong>To be clear..

this is dot2dot

http://www.ls1info.com/article.php?sid=192

if there is gas and spark. they must not be happening
at the correct time..

Terry</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That picture is exactly how I set it (after correcting it from the first time). With it lined up that way, is it still possible to be 180 off or is it most likely at that point that my valves are toast?

Richard@WCCH

iTrader: (3)

It's not possible to install the cam 180º out. When you have the cam and crank installed dot2dot and rotate the crank one full turn (360º) the dot on the cam gear will now be at the twelve o'clock position or 180º from the crank dot. Rotating the crank another full turn (360º)will line up the dots again. In short, the cam is either installed correctly or it isn't.
Sounds to me like some valves are bent. <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
Compression test is the quickest and most positive way of finding out.

I sure hope you get this problem resolved soon. I'm pullin for ya dude <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

98blackSS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryoga:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by TA_2001:
<strong>To be clear..

this is dot2dot

http://www.ls1info.com/article.php?sid=192

if there is gas and spark. they must not be happening
at the correct time..

Terry</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That picture is exactly how I set it (after correcting it from the first time). With it lined up that way, is it still possible to be 180 off or is it most likely at that point that my valves are toast?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No, you're fine as far as that respect. They were talking about a goofed alignment of the reluctor which doesn't apply to your cam since it came out of a car in which it was working fine previously..

98blackSS

Post us with the results of all 8 cylinders when you get done with the testing.

ShiznityZ28

iTrader: (11)

I think he ligned up the dots on the wrong stroke. but he i am an idiot.LOL

Ryoga

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by ShiznityZ28:
<strong>I think he ligned up the dots on the wrong stroke. but he i am an idiot.LOL</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">They should be lined up on a certain stroke? I was thinking that no matter how I did it, so long as the dots were right everything would fall under the right 'stroke'. Is this not true?

SS00Blue

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryoga:
<strong> They should be lined up on a certain stroke? I was thinking that no matter how I did it, so long as the dots were right everything would fall under the right 'stroke'. Is this not true?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No. Don't worry about it. The cam rotates one 360* revolution for every two rotations of the crank. If you stop and think about it, it can NEVER be 180* out with the dots lined up the way the picture shows. The only detail, about which I was concerned, was if you were not dot-to-dot, which you've already fixed. (By the way, "EXCELLENT picture" to the person that posted it.)

Just do the comp test, because 30* almost invariably will mate Mr. valve with Mr. piston. (Sorry)

But on the good side, the "H" portion of the "H/C" is now a possible reality.... <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

SC

<small>[ June 20, 2002, 09:25 AM: Message edited by: SS00Blue ]</small>

98blackSS

no, they only line up one way. sounds like you're ok with that now..

GeorgeC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryoga:
<strong>They should be lined up on a certain stroke? I was thinking that no matter how I did it, so long as the dots were right everything would fall under the right 'stroke'. Is this not true?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">As long as the dots are lined up, you're good to go.

Ryoga

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SS00Blue:
<strong>[QUOTE]
Just do the comp test, because 30* almost invariably will mate Mr. vavle with Mr. piston. (Sorry)

But on the good side, the "H" portion of the H/C is now a possible reality.... <img border="0" title="" alt="[Sad]" src="gr_sad.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
SC</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">While I wait for the compression check tool to arrive, let me ask this. Lets suppose that the valves are bent-heck, lets say it's all of them. Lets also throw in that I am in no way able to come close to affording heads right now. How much out of pocket will it cost for me to do the work and replace the valves? (I'm just thinking about the worst case scenarios). Am I at the point where the best thing to do is tow it to a mechanic?

<small>[ June 20, 2002, 09:29 AM: Message edited by: Ryoga ]</small>

rom3

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryoga:
<strong> [QUOTE]Originally posted by ShiznityZ28:
<strong>I think he ligned up the dots on the wrong stroke. but he i am an idiot.LOL</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">They should be lined up on a certain stroke? I was thinking that no matter how I did it, so long as the dots were right everything would fall under the right 'stroke'. Is this not true?</strong>

never mind, I'm an idiot...
(edited to remove guessing on my)

<small>[ June 20, 2002, 12:50 PM: Message edited by: rom3 ]</small>

Ryoga

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by rom3:
<strong>Since the crank rotates twice for each rotation of the cam, it is possible to install "dot to dot" out of phase. The dots must line up when #1 is at TDC of the compression stroke, just about to fire. This was the point of the earlier posts regarding making sure both valves on #1 were closed and #1 piston was at the top of it's travel. How was the dot to dot install done?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">We turned the crank until the dot was at the 6 o'clock position and then took the chain off and turned the crank until it was at the 12 o'clock position. Put the chain back on and buttoned it up.

MelloYellow

Like he said, dot to dot while Piston #1 is at TDC.

SJH

Impossible to put a cam 180 degrees off dot to dot.
Sorry a thumb in the hole is not going to cut it..well maybe not on your engine <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

Do a compression test. If you find any bad cylinders just stop the test as you know the damage is done to the valves and pull the heads.

You can't over tighten rockers and hold the valves open. They are non adjustable.If you over tighten them you'll just snap the bolts but it won't put any more preload on the lifters.
Not unless the cam base circle was to LARGE and you needed shorter pushrods would the valves be held open.
Good luck.
Steve

Ryoga

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MelloYellow:
<strong>Like he said, dot to dot while Piston #1 is at TDC.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Now I'm really confused again... 1/2 of you are saying so long as the dots are right, 180 degrees off isn't a problem and the other 1/2 are saying that I need to rotate the crank until the piston hits TDC before I line the cam dot up, otherwise it can and will be 180 degrees off. What's the skinny here?

rom3

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SJH:
<strong>Impossible to put a cam 180 degrees off dot to dot.
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Why is this? Won't the crank dot also be at the "right" position when #1 piston is at the top of the exhaust stroke?

ie. #1 cylinder is at TDC at end of compression and exhaust strokes, at BDC at end of intake and power strokes?

<small>[ June 20, 2002, 12:53 PM: Message edited by: rom3 ]</small>

JC

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryoga:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by MelloYellow:
<strong>Like he said, dot to dot while Piston #1 is at TDC.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Now I'm really confused again... 1/2 of you are saying so long as the dots are right, 180 degrees off isn't a problem and the other 1/2 are saying that I need to rotate the crank until the piston hits TDC before I line the cam dot up, otherwise it can and will be 180 degrees off. What's the skinny here?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You're not the only one who's freakin' confused!!!! Which is it people?!

SJH

first of all the cam is installed on cyl #1's TDC intake stroke and not compression.
#6 will be at TDC compression when the dots line up.
The cam defines the valve events not the crank of course.
The crank is keyed to the cam gear and when that dot is at the 12 o clock position the #1 and #6 throws are at TDC's.
So that leaves only one thing to line up when both sprockets are at dot to dot and that is the cam to cam sprocket.
The cam locating dowel pin makes sure you install it correctly in phase.
You can't put the cam in 180 off as the dowel pin won't line up with the sprocket.
Steve

<small>[ June 20, 2002, 10:11 AM: Message edited by: SJH ]</small>

98blackSS

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by SJH:
<strong>first of all the cam is installed on cyl #1's TDC intake stroke and not compression.
#6 will be at TDC compression when the dots line up.
The cam defines the valve events not the crank of course.
The crank is keyed to the cam gear and when that dot is at the 12 o clock position the #1 and #6 throws are at TDC's.
So that leaves only one thing to line up when both sprockets are at dot to dot and that is the cam to cam sprocket.
The cam locating dowel pin makes sure you install it correctly in phase.
You can't put the cam in 180 off as the dowel pin won't line up with the sprocket.
Steve</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">This is correct. You other people stop confusing the issue <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />