valvetrain noise

Reply Subscribe

Thread Tools

Search this Thread

Aug 20, 2008 | 10:29 PM

butters02z

Thread Starter

Teching In

Joined: Mar 2008

Posts: 15

Likes: 0

From: Belvidere

valvetrain noise

ok i have just installed a set a heads and a cam the cam is 580 lift now i have a pretty loud ticking noise i think it is from the lifters but not sure what is the best way to tighten down the rockers becuse i have read all kinds of ways i not even sure if that is what is wrong but i have no other ideas i have 50psi for oil but out of ideas please help

Aug 20, 2008 | 10:31 PM

Gregorya24

Launching!

iTrader: (13)

Joined: Jan 2008

Posts: 285

Likes: 0

From: Charleston, SC

are all of your rockers torqued down to 22 foot lbs?

Aug 21, 2008 | 06:19 AM

muayyadf1

On The Tree

Joined: Jan 2006

Posts: 182

Likes: 0

I have the same thing, I will try to torque the rockers to 25ft/lbs.

Rotate the engine many times then re-check..

Aug 21, 2008 | 12:05 PM

BAD2000TA

12 Second Club

iTrader: (6)

Joined: Apr 2004

Posts: 1,338

Likes: 1

From: Friendswood

Quote:

Originally Posted by muayyadf1

I have the same thing, I will try to torque the rockers to 25ft/lbs.

Rotate the engine many times then re-check..

It's 22 pounds. You DON'T want to break a bolt in the rocker stand.

Aug 21, 2008 | 01:54 PM

KennethS

Teching In

Joined: Nov 2007

Posts: 29

Likes: 0

From: Detroit Metro

Does it go away after warm up? Hydraulic lifters? Are you sure it is not a exhaust manifold leaking?

Aug 21, 2008 | 01:59 PM

sidewayz28

TECH Junkie

iTrader: (24)

Joined: Jul 2005

Posts: 3,548

Likes: 1

From: seattle

your going to have to get used to a loud valvetrain

Aug 21, 2008 | 02:05 PM

muayyadf1

On The Tree

Joined: Jan 2006

Posts: 182

Likes: 0

Quote:

Originally Posted by BAD2000TA

It's 22 pounds. You DON'T want to break a bolt in the rocker stand.

Well, I torqued them before to 22 pounds, when I tried to torque them for more, the bolt didn't go more, my torque wrench just clicked immediatly.

guess loctite made them tight!

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

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

Brett Foote

Aug 21, 2008 | 11:04 PM

butters02z

Thread Starter

Teching In

Joined: Mar 2008

Posts: 15

Likes: 0

From: Belvidere

the push rods are right i asked the guys from speed inc and he said the push rods are good and it starts making noise after it warms up

Aug 21, 2008 | 11:30 PM

#10

Tom@SpeedInc

Banned

iTrader: (5)

Joined: Apr 2003

Posts: 1,890

Likes: 0

From: Chicago

stock length is 7.400"

we have used 7.425" pushrods in cam swaps.

only way to tell is by using a length checker.

Aug 21, 2008 | 11:42 PM

#11

MrElectric03

TECH Fanatic

iTrader: (71)

Joined: Dec 2007

Posts: 1,885

Likes: 1

From: Southern California

Im having a similar problem...I used a length checker but its telling me that I should have a 7.405" pushrod for .080" of lifter preload. SO I should have .075" of preload which is ok. It is still very loud and only after warm up. I am going to check the pushrod cups on my yella terras to be sure one didnt fall out and maybe measure my pushrods with a digital caliper and after that I may buy the 7.425 pushrods just to see if it make a difference.

Aug 22, 2008 | 12:17 AM

#12

Gregorya24

Launching!

iTrader: (13)

Joined: Jan 2008

Posts: 285

Likes: 0

From: Charleston, SC

are your lifters good?

Aug 22, 2008 | 03:35 AM

#13

DaddySS

TECH Addict

Joined: Dec 2001

Posts: 2,907

Likes: 1

From: Bergen County, NJ

Quote:

Originally Posted by MrElectric03

At .075 you are at the low end and many builders recommend .080 to .100 (.125 is the max). So if you have a noisy valvetrain, it seems to me that 7.425 would be a good choice.

Aug 22, 2008 | 07:23 AM

#14

Raise

TECH Addict

iTrader: (31)

Joined: Dec 2003

Posts: 2,152

Likes: 0

From: Virginia Beach, Va

Quote:

Originally Posted by sidewayz28

your going to have to get used to a loud valvetrain

Ive done many head/cam swaps and the valvetrain noise is always more prominent.

Aug 22, 2008 | 10:17 AM

#15

butters02z

Thread Starter

Teching In

Joined: Mar 2008

Posts: 15

Likes: 0

From: Belvidere

i just looked i am using 7.400 push rods so you think i should get some new ones the specs on my cam is 225/229 .580''/.590'' and ls6 style heads 2.02'' / 1.57''/64cc anything will help

Aug 22, 2008 | 10:32 AM

#16

LS1-450

TECH Junkie

iTrader: (33)

Joined: Aug 2005

Posts: 3,783

Likes: 9

Quote:

Originally Posted by butters02z

i just looked i am using 7.400 push rods so you think i should get some new ones the specs on my cam is 225/229 .580''/.590'' and ls6 style heads 2.02'' / 1.57''/64cc anything will help

How's your valve wipe pattern look? If not centered & your tick is due to short push rods, then try 7.425" push rods.

FYI, I have adjustable rockers & have experimented with setting pre-load from 0.080" all the way to.125" on LS7 lifters, without causing any problem w/ the lifters. So don't be weary of using a longer push rod that results in a deeper pre-load, on your non-adjustable set up.

Aug 22, 2008 | 07:24 PM

#17

butters02z

Thread Starter

Teching In

Joined: Mar 2008

Posts: 15

Likes: 0

From: Belvidere

i am going to try to adjust the rockers and see what happens what is the proper way to do this i have no idea all i see is tighten to 22ftlbs and that is it anything else

Aug 22, 2008 | 07:54 PM

#18

LS1-450

TECH Junkie

iTrader: (33)

Joined: Aug 2005

Posts: 3,783

Likes: 9

Quote:

Originally Posted by butters02z

i am going to try to adjust the rockers and see what happens what is the proper way to do this i have no idea all i see is tighten to 22ftlbs and that is it anything else

You can't adjust stock rockers. Only way to change wipe pattern/lifter pre-load is w/ different length push rods. This is why many people in this thread have suggested longer pushrods.

Aug 22, 2008 | 07:57 PM

#19

vettenuts

TECH Senior Member

iTrader: (4)

Joined: Jul 2004

Posts: 8,092

Likes: 13

From: Little Rhody

Quote:

Originally Posted by butters02z

i am going to try to adjust the rockers and see what happens what is the proper way to do this i have no idea all i see is tighten to 22ftlbs and that is it anything else

Here is the procedure, but you are fishing in the wrong pond. First, did you check the wipe pattern to ensure you have the correct rocker geometry. Once you have the correct geometry, determine pushrod length by measuring to obtain correct preload on the lifter. Everything else is a shortcut. You can tighten the rockers until the bolt strips, if they are tight it won't make any difference. All you are doing by tightening more is loading the aluminum threads more.