setting valves
setting valves I'm having a lot of trouble setting my valves. I've got it on tdc, dot to dot. I try to set the valves with my book w/intructions but #8 exhuast valve is still up when I belive it should be down. I went to set anyway and the nut bearly went on the stud before I hit 0 lash. I knew this was wrong since most the others go almost 1/4" down on the stud. Then I rotated the motor 180 degrees to set the rest of the valves and had so much slack on #8 exhuast the pushrod almost fell out. I have this problem on a few of them. I was told the cam is the biggest one that gm sells. Can anyone help? Please let me know I've been fighting this thing and its woopen my a$$. Thanks!
make sure your on the compression stroke(right when the spark plug would fire). i learned that the hard way. took me 2 days to figure out what i did. i had the same problem you did. i wasnt on the compression stroke when adjusting my valves. 
i brought each cylinder to TDC(following the firing order of the engine) and then adjusted them.
i brought each cylinder to TDC(following the firing order of the engine) and then adjusted them.
Last edited by Badazz 97 TA; Dec 16, 2007 at 08:03 PM.
The easiest and most foolproof way that seems to be safe on any cam that I have been taught is...
Adjust the intake when the exhaust begins to open (exhaust lifter starts coming up)
Then adjust the Exhaust when the intake closes (intake lifter fully down on base circle)
You can do this method each bank at a time from front to back or back to front or whatever, or you can follow the firing order. If you are new to this the easiest way would probably be for you to do it one bank at a time from front to back. IE first do 2,4,6,8 then 1,3,5,7.
Adjust the intake when the exhaust begins to open (exhaust lifter starts coming up)
Then adjust the Exhaust when the intake closes (intake lifter fully down on base circle)
You can do this method each bank at a time from front to back or back to front or whatever, or you can follow the firing order. If you are new to this the easiest way would probably be for you to do it one bank at a time from front to back. IE first do 2,4,6,8 then 1,3,5,7.
Yeah, 4 stroke engine, have to make sure the piston is at TDC on the right stroke. It sounds like you have it at TDC between the exhaust and intake strokes rather than between compression and power strokes.
you dont necesarly have to start at #1 cylinder. as long as you see the intake valve go down and back up you can start at whatever cylinder that may be
the firing order for an LT1 is 1-8-4-3-6-5-7-2
the firing order for an LS1 is 1-8-7-2-6-5-4-3
also there are several ways to adjust valves. i personally liked bringing up each cylinder to TDC but the other easy way is bringing up #1 to TDC then adjusting the correct cylinders then bring #6 To TDC then adjusting the remaining valves. method #1 or method #2 are my favorites
heres a link that explains how
http://shbox.com/1/4th_gen_tech2.html#adjust_valves
hope that helps
Last edited by Badazz 97 TA; Dec 16, 2007 at 08:52 PM.
Trending Topics
no problem man, if you have any other questions feel free to ask. it seems confusing at first but once you get the hang of it you will realize how simple it is. i was in the same boat as you a few weeks ago
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
also there are several ways to adjust valves. i personally liked bringing up each cylinder to TDC but the other easy way is bringing up #1 to TDC then adjusting the correct cylinders then bring #6 To TDC then adjusting the remaining valves. method #1 or method #2 are my favorites