Please advise me 408 problems
Thread Starter
On The Tree
Joined: Nov 2004
Posts: 116
Likes: 0
From: middle east kuwait
Please advise me 408 problems I had a problem when we tightened the rocker it would stay up because the Pushrod are to long so I changed them from 7.400 to 7.200 now the problem is the car starts perfectly but all you can hear is the rockers chic chic chic.
Now what they told me was to replace the stock rocker with an aftermarket rocker or go for a cam that I can use Pushrod 7.400
Am really confused I dont want to speed money with out solving the problem.
I really appreciate your help what do you recommend me?
This is my engine spec
408 Strocker crank Lunati 4.000 Rods 6.125Lunati pistons 4.030 Mahle Dished Piston Set: 4.030".927" Wrist Pins, 1.105" CH, -12cc Dish
Cam comp SI7 238/244 605/612 110
Patriot Performance LS6 5.7L Stage II Head Assy
(2.02/1.60/59cc)
Now what they told me was to replace the stock rocker with an aftermarket rocker or go for a cam that I can use Pushrod 7.400
Am really confused I dont want to speed money with out solving the problem.
I really appreciate your help what do you recommend me?
This is my engine spec
408 Strocker crank Lunati 4.000 Rods 6.125Lunati pistons 4.030 Mahle Dished Piston Set: 4.030".927" Wrist Pins, 1.105" CH, -12cc Dish
Cam comp SI7 238/244 605/612 110
Patriot Performance LS6 5.7L Stage II Head Assy
(2.02/1.60/59cc)
I've seen some of the guys use .010 shims on some of their applications under the rockers. Maybe if you put the 7.4 back in and use the shims you'll come out with 7.3?? I'm just guessing here. I don't know how much the heads are milled.
Thread Starter
On The Tree
Joined: Nov 2004
Posts: 116
Likes: 0
From: middle east kuwait
What rockers are you using. AN easy way to check pushrod length with a stock rocker is to ...
Put the rocker on a lobe thats on the base circle(not open) then tighten it until the rocker does not have any play left to right and you cannot turn the pushrod. do this by hand with a socket but no rachet. then tq it to 22ftlbs counting the rotation. you want 3/4 to 1 1/2 turns on OE lifters.
7.4 sounds to long and 7.2 is way short. Its gona end up 7.3 to 7.35 more than likely. do not run a car unless it has the right pushrods you will beat up the valve train.
Put the rocker on a lobe thats on the base circle(not open) then tighten it until the rocker does not have any play left to right and you cannot turn the pushrod. do this by hand with a socket but no rachet. then tq it to 22ftlbs counting the rotation. you want 3/4 to 1 1/2 turns on OE lifters.
7.4 sounds to long and 7.2 is way short. Its gona end up 7.3 to 7.35 more than likely. do not run a car unless it has the right pushrods you will beat up the valve train.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
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
Originally Posted by mohammed_k81
Am usind the stock ls1 rockers whats strange is a few are tight and some are not. i hope i solve it soon
If they do not all come out the same while on the base curcle than the valves are beat up. all 8 exh should be the same and all 8 intake the same sometimes int to exh is diff depending on the cam core and lobe family.
Thread Starter
On The Tree
Joined: Nov 2004
Posts: 116
Likes: 0
From: middle east kuwait
Well guys I really appreciate all you trying to help me solve problem my noise problem.
I have changed the Cam and now am using rods 7.450 tomorrow I will dyno tune it.
I will get some video clips.
All you guys are really grate for taking the time explaining what could be the issue
Respect
I have changed the Cam and now am using rods 7.450 tomorrow I will dyno tune it.
I will get some video clips.
All you guys are really grate for taking the time explaining what could be the issue
Respect