ive got this sick feeling that I screwed up bad
Apr 5, 2014 | 07:39 PM
#21
no torque sequence, no valve lash adjustments. as long as you're running the correct length pushrod zip them down until it bottoms out and give it 22ft lbs. I like to turn the motor until the lifter is on the base circle of the cam, but it's not necessary.
Apr 5, 2014 | 08:21 PM
#22
Here is the tightening sequence on the rockers. This is what I used on mine. You'd probably be ok not following it, but I like to be safe. Post # 34 in the following link or just scroll down to see the pic, should go right to it if you do click.
Corvette Forum - View Single Post - COMP Rocker Trunion Install
Edit- this has you tighten the rockers while they're on the base circle of the cam like mentioned above.
And because not eveyone likes to click on links:
Corvette Forum - View Single Post - COMP Rocker Trunion Install
Edit- this has you tighten the rockers while they're on the base circle of the cam like mentioned above.
And because not eveyone likes to click on links:
Last edited by Jeebalow; Apr 5, 2014 at 08:27 PM.
Apr 6, 2014 | 04:38 PM
#24
Teching In
Joined: Mar 2014
Posts: 28
Likes: 0
From: Colorado Springs, Co.
my guess is either you installed the wrong lifters and they are too tall or somehow you messed up reinstalling the valve train. because that engine is clearly turning over and has 0 compression.
Apr 7, 2014 | 01:12 PM
#26
Thread Starter
Teching In
Joined: Mar 2014
Posts: 35
Likes: 0
From: Austin, Texas
I did the exact same thing! On my 98 i tightened the rockers too much and the valves never closed so it never built compression. I knew exactly what you meant when I read your post then the video just brought back memories of me freaking out too. I would guess these rockers just tighten down right? dont have to do a sequence like the ol SBC's i thought?! Perhaps you over tightened them.
Correct me if im wrong, but ive seen many vids of people just torquing the rocker nuts down regardless of TDC or crank position. Guy did a cam swap and push rod swap and just tightened the rockers down to spec and buttoned up the engine.
You didnt break anything more than likely, just missing compression.
Correct me if im wrong, but ive seen many vids of people just torquing the rocker nuts down regardless of TDC or crank position. Guy did a cam swap and push rod swap and just tightened the rockers down to spec and buttoned up the engine.
You didnt break anything more than likely, just missing compression.
Here is the tightening sequence on the rockers. This is what I used on mine. You'd probably be ok not following it, but I like to be safe. Post # 34 in the following link or just scroll down to see the pic, should go right to it if you do click.
Corvette Forum - View Single Post - COMP Rocker Trunion Install
Edit- this has you tighten the rockers while they're on the base circle of the cam like mentioned above.
And because not eveyone likes to click on links:
Corvette Forum - View Single Post - COMP Rocker Trunion Install
Edit- this has you tighten the rockers while they're on the base circle of the cam like mentioned above.
And because not eveyone likes to click on links:
yeah they were exactly the same size. My hope is that the rocker arms arent tight enough because I didnt torque them to spec..but it seems like I should still have compression even if the rocker arms werent installed because the valves should be seated..
Apr 7, 2014 | 02:07 PM
#30
You were bending pushrods when tightening down the rockers? Either your lifters are too tall or aren't installed all the way, or the pushrods are too long, or you forgot to install the rocker pedestal.