Is this valvetrain noise?
Is this valvetrain noise? I can't tell and the squeaking throws me off.
http://www.youtube.com/watch?v=NQNW94OUFTc
It's got good oil pressure.
I have a Vengeance racing vindicator cam (.605 .596 240/244), LS7's, 7.325" PR's, stock rocker arms, AFR 205's milled to 62ccs.
I never measured for lifter preload just went by what someone told me to get.
I can also push some of the lifters down by hand and the rest are solid. All parts have less than 5k miles.
Thanks
http://www.youtube.com/watch?v=NQNW94OUFTc
It's got good oil pressure.
I have a Vengeance racing vindicator cam (.605 .596 240/244), LS7's, 7.325" PR's, stock rocker arms, AFR 205's milled to 62ccs.
I never measured for lifter preload just went by what someone told me to get.
I can also push some of the lifters down by hand and the rest are solid. All parts have less than 5k miles.
Thanks
Trending Topics
Definitely sounds like a loose rocker arm to me. While your at it go ahead and check the pushrod length to see if the geometry is correct because that is never a bad idea. Comp makes a nice length checker IIRC it is part# 7702-1 in Summit.
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 Thanks for the help. And I double checked all the rocker arms and they were good.
I can't tell and the squeaking throws me off.
http://www.youtube.com/watch?v=NQNW94OUFTc
I never measured for lifter preload just went by what someone told me to get.
Thanks
http://www.youtube.com/watch?v=NQNW94OUFTc
I never measured for lifter preload just went by what someone told me to get.
Thanks
On The Tree
Joined: Aug 2007
Posts: 121
Likes: 0
From: stockton california
hey I have the same noise and everything checks out fine. I bought a cam package from TR and they told me to get 7.425 push rods. Is this the right push rod length for a raptor cam, and new ls7 lifters. I always that since the new ls7 lifter are taller then stalk ls1 lifters that the push rods should be shorter. I too need help, dont want to start a whole new thread since we are on topic with this one. I hate the noise, so if I can make it any quieter I will. Thanks.
On The Tree
Joined: Aug 2007
Posts: 121
Likes: 0
From: stockton california
Again I do have double valve springs, I've read that this and the fast ramp rate of the cam will give me a NOT so quiet valve train. I want to get my car tuned already, don't want to take it apart again.
I always that since the new ls7 lifter are taller then stalk ls1 lifters that the push rods should be shorter. I too need help, dont want to start a whole new thread since we are on topic with this one. I hate the noise, so if I can make it any quieter I will. Thanks.
TECH Fanatic
Joined: Jan 2010
Posts: 1,219
Likes: 0
From: Euless Tx
hey I have the same noise and everything checks out fine. I bought a cam package from TR and they told me to get 7.425 push rods. Is this the right push rod length for a raptor cam, and new ls7 lifters. I always that since the new ls7 lifter are taller then stalk ls1 lifters that the push rods should be shorter. I too need help, dont want to start a whole new thread since we are on topic with this one. I hate the noise, so if I can make it any quieter I will. Thanks.
On The Tree
Joined: Aug 2007
Posts: 121
Likes: 0
From: stockton california
Well after 25 miles into break in surprisingly my car started up on the first try this morning, and to my amaze my valvetrai. Got quieter but I can still hear it just not as bad. Maybe it just needs more break in time.
I wonder how much preload my lifters were getting with the LS7's and a 7.325" PR?? Could a lack of preload cause a lifter to fail? Or could the lack in preload cause such a racket?
