PLEASE HELP ROLLER ROCKERS INSTALL SBC
02-14-2013, 04:23 AM
#1
Registered Member
Thread Starter
Join Date: Apr 2011
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
PLEASE HELP ROLLER ROCKERS INSTALL SBC
Car is an 85 Camaro with a Carbureted 350 Small Block. What I know is it has Cast# 33382 Cylinder heads, MSD ignition, edelbrock intake manifold, and holley 600 carb.
I went to install 1.6 Roller-Tip Rockers (Jegs house brand) this past weekend and what should have been a 2 hour job has turned into 5 days! When I first installed them I started the car and they were clacking. So I assumed my adjusting was off. So I set the car back at TDC (to the absolute best of my knowledge) and readjusted them, then turned crank 360 and readjusted the rest.
I tried starting the car and it would roll then hesitate and roll some more. And click and clack and throw a puff out of the carb.
I adjusted and readjusted them 5 different times.
Now the car will rotate but not start. No hesitation just spin and spin rather quickly.
THINGS I KNOW: I am sure they arent adjusted to tightly. I am getting spark. And Plugs are wet with fuel when I pull them.
PLEASE SOMEBODY LET ME KNOW TO THE BEST OF THEIR KNOWLEDGE WHAT MAY BE GOING ON.
I went to install 1.6 Roller-Tip Rockers (Jegs house brand) this past weekend and what should have been a 2 hour job has turned into 5 days! When I first installed them I started the car and they were clacking. So I assumed my adjusting was off. So I set the car back at TDC (to the absolute best of my knowledge) and readjusted them, then turned crank 360 and readjusted the rest.
I tried starting the car and it would roll then hesitate and roll some more. And click and clack and throw a puff out of the carb.
I adjusted and readjusted them 5 different times.
Now the car will rotate but not start. No hesitation just spin and spin rather quickly.
THINGS I KNOW: I am sure they arent adjusted to tightly. I am getting spark. And Plugs are wet with fuel when I pull them.
PLEASE SOMEBODY LET ME KNOW TO THE BEST OF THEIR KNOWLEDGE WHAT MAY BE GOING ON.
Last edited by aa4baseball; 02-14-2013 at 04:27 AM.
02-14-2013, 04:50 AM
#2
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
Have you checked for piston to valve clearance, pushrod bind, coil bind, and the few other geometry-based problems that can arise when changing rocker ratio?
02-14-2013, 05:22 AM
#4
Registered Member
Thread Starter
Join Date: Apr 2011
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
I did not check them myself but did quite a bit of research on installing them before I did. All indications say those rockers should have no problem with being installed in my motor. Also, its just so odd when I first installed them it ran with just some clacking (which I now realized could have been remedied more easily) and now it wont start at all. Is it possible my ignition timing is off now? This seems to be one of the only things that would explain whats going on. Even though I did not touch the distributor during this.
02-14-2013, 05:31 AM
#5
Registered Member
Join Date: Feb 2011
Posts: 9,144
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
I did not check them myself but did quite a bit of research on installing them before I did. All indications say those rockers should have no problem with being installed in my motor. Also, its just so odd when I first installed them it ran with just some clacking (which I now realized could have been remedied more easily) and now it wont start at all. Is it possible my ignition timing is off now? This seems to be one of the only things that would explain whats going on. Even though I did not touch the distributor during this.
02-14-2013, 07:28 AM
#6
Registered member
Join Date: Dec 2009
Posts: 681
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
A simple timing light will confirm whether you are out of time or not. How exactly did you adjust them?
I'm gonna ask you a very simple question and the answer to this question should probably lead you directly to an answer...
What happens if your valves don't close all the way at TDC on the compression stroke?
I'm gonna ask you a very simple question and the answer to this question should probably lead you directly to an answer...
What happens if your valves don't close all the way at TDC on the compression stroke?
02-14-2013, 07:35 AM
#8
Registered Member
Thread Starter
Join Date: Apr 2011
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
As far as I know it is a stock cam. And I'm pretty sure all the valves are in fact closing completely. That was one o my first suspicions was that they were on to tight. So I readjusted them. And thanks for the replies
02-14-2013, 07:42 AM
#9
Racetracks
Join Date: Nov 2002
Location: How long is a piece of string?
Posts: 15,668
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
And you're sure that you're setting lash on the base circle of the cam for each cylinder? There's going to be an easy explanation for this, and I can't believe you're having starting problems due to a difference in airflow, unless you have valves not closing properly.
02-14-2013, 08:03 AM
#10
Registered Member
Thread Starter
Join Date: Apr 2011
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Re: PLEASE HELP ROLLER ROCKERS INSTALL SBC
To the best of my knowledge the valves are not over tightened. I have adjusted and readjusted. I know the firing order is correct. Im getting spark. The spark plugs are wet with fuel when I pull them out. I don't know of any fuses or anything that could have blown. I did wipe the corrosion off I the inside of my rotor cap but other than that didn't change anything.