Valve Spring dampener broken

Shaun41178(2) · Post by **Shaun41178(2)** » Wed Sep 26, 2007 7:50 pm

how critical are these things to not be broken? I pulled the valve covers off the motor today and I noticed that the dampeners under the springs were broken on 2 valves.

I dont' remember off hand if it were the exh or intake valves.

Just how critical are these things to be intact? Can I just pull the spring, take out the dampener and reinstall the spring sans dampener?

What causes these to break? I am guessing over reving.

They are crane springs

p8ntman442 · Post by **p8ntman442** » Wed Sep 26, 2007 9:26 pm

pics or ban. Not sure what your talking about?

just out of curiosity did you overrev it prompting this valve cover removal?

Shaun41178(2) · Post by **Shaun41178(2)** » Wed Sep 26, 2007 10:26 pm

Pics will haev to wait till tomorrow as I didn't take any. I figured it would be hard to see the broken dampener through the spring if a pic was taken which is why I didn't take any tonight.

No no overrevving. Maybe 10k miles on the springs and dampeners.

The dampener is what sits inside the spring This is the best pic I could find on a quick search

Here is a large pic. Not sure if it will work might need to copy and paste.
http://www.cranecams.com/images/downloa ... 96805).jpg

AkursedX · Post by **AkursedX** » Wed Sep 26, 2007 10:39 pm

I'm not sure on how harmful this is, but I could see some potential bad things if they keep breaking down. Pieces of broken metal are never good in an engine. I could see them possibly getting caught in a valvespring and creating some unwanted bind, or possbily clogging oil passeges depending on how much breaks off.

But that is all theory. If it's apart, might as well replace it.

p8ntman442 · Post by **p8ntman442** » Thu Sep 27, 2007 10:31 am

I thought that was there to prevent the coils from slipping past each other when over compressed. I'm not sure why you would want a dampener on a valve spring, that would only hurt performance. I would deffinatly replace with new springs and "dampeners, and give the manufacturer a call, they would really be able to tell you, but I would not leave a broken one in the car for sure.

The Dark Side of Will · Thu Sep 27, 2007 10:48 am

The dampers are exactly that... dampers. They introduce friction into the valvespring to kill valvetrain resonance. If you remove them, you'll float the valves more easily because your valvesprings will be more resonant.

p8ntman442 · Post by **p8ntman442** » Thu Sep 27, 2007 11:08 am

The Dark Side of Will wrote:The dampers are exactly that... dampers. They introduce friction into the valvespring to kill valvetrain resonance. If you remove them, you'll float the valves more easily because your valvesprings will be more resonant.

How do you become more resonant? Do you mean the resonant F would be much lower to where typical RPM creates resonance? Are they dampers, or are they a second set of springs that adjust the resonant frequency by acting in parallel?

The Dark Side of Will · Thu Sep 27, 2007 2:44 pm

They use friction to dissipate energy and reduce the valvespring Q.

Kohburn · Post by **Kohburn** » Thu Sep 27, 2007 4:20 pm

never seen em inside an engine before, have never had to remove let alone reinstall dampeners on valve springs when i removed the springs.

The Dark Side of Will · Thu Sep 27, 2007 5:23 pm

Usually they stay with the spring...