Quick question
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Racer
Joined: Nov 2005
Posts: 346
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Quick question
Not sure how to ask this...... but what does a broken valve spring sound like? Could it make a ticking noise? Do you loose power? I know my next step is to pull the valve cover.
Last edited by rbrtclk; Sep 3, 2013 at 02:04 PM. Reason: incomplete
Thread Starter
Racer
Joined: Nov 2005
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Race Director
Joined: Sep 2005
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From: Pasco WA
Thread Starter
Racer
Joined: Nov 2005
Posts: 346
Likes: 0
Race Director
Joined: Sep 2005
Posts: 11,060
Likes: 291
From: Pasco WA
Most aftermarket cams change the geometry of the pushrod/rocker arm, and you should install new springs. Vettenuts has a good explanation of adjusting your wipe pattern for best results, but most shade tree mechs just install the new components, and torque them to specs, which often results in what's referred to as " sewing machine " sound. Wipe pattern refers to the point where the valve tip contacts the rocker arm.
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Safety Car
Joined: May 2007
Posts: 4,812
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From: Taylorsville North Carolina
Here is what mine sounds like with a broken spring on #8:
Really hard to tell from sound, but you should be able to feel loss in power. Mine dynoed at 450ish when it should be 500+. Then again, it is only like 10 min to pull valve cover. Good luck with it.
Really hard to tell from sound, but you should be able to feel loss in power. Mine dynoed at 450ish when it should be 500+. Then again, it is only like 10 min to pull valve cover. Good luck with it.
Thread Starter
Racer
Joined: Nov 2005
Posts: 346
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Found my problem
I removed my valve cover and discovered that the number 5 rocker arm was loose on it's pivot shaft. Upon further examination, I determined that the "keepers" on either side of the shaft had fractured and the rocker arm was just " floating" and my "ticking" sound was the push rod pushing the arm up and hitting the bottom of the pivot shaft. $20.00 fix, whew! Thanks for all the help and suggestions. THIS FORUM ROCKS! ! !
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Your best bet is to up-grade ALL your rocker trunions to new improved ones
COMP CAMS has your answer!!
I did this to a buddys car and he was extremely happy!
http://www.summitracing.com/search/p...-trunnion-kits
COMP CAMS has your answer!!
I did this to a buddys car and he was extremely happy!
http://www.summitracing.com/search/p...-trunnion-kits
Thread Starter
Racer
Joined: Nov 2005
Posts: 346
Likes: 0
Your best bet is to up-grade ALL your rocker trunions to new improved ones
COMP CAMS has your answer!!
I did this to a buddys car and he was extremely happy!
http://www.summitracing.com/search/p...-trunnion-kits
COMP CAMS has your answer!!
I did this to a buddys car and he was extremely happy!
http://www.summitracing.com/search/p...-trunnion-kits