[Fot] Dual Valve Springs

[Larry Young]

You should check that you don't have coil bind.  I'd think that would be 
a likely cause.

On 6/17/2012 10:10 AM, Tylerpthompson at yahoo.com wrote:
> I had a miss at high rpms.  My distributor had a lot of wobble at the top of
> the shaft so replaced it. Although it ran stronger at low speeds, the miss at
> high rpms was still there. I pulled the valve cover and found the number 4
> inner valve spring was broken. Thanks to Jim Gray (again) for suggesting I
> check this.
>
> I am wondering what may have caused this.  I am also wondering if I should
> pull the head to see if it caused any damage but since it ran very smooth at
> low rpms, I am thinking I was just getting some valve float at high rpms.
>
> I am going to replace all the springs at this point to make sure.  I think I
> can raise the piston to TDC for each cylinder, and use the valve spring
> compressor for on head removal.  Have others done spring replacements this way
> or should I just pull the head?
>
> Finally, what springs do folks use?  In searching the web, it seems rare to
> see a valve spring break, but I have not heard what experiences other FOT
> users have had. I have a Paeco 6600 rpm cam, titanium retainers, and chrome
> moly push rods as well as a rebuilt rocker assembly, but those roller rockers
> sure do look nice!
>
> Thanks in advance for your helpful advice and Happy Fathers Day to all the
> dads out there.
>
> Ty
>
>
> Sent from my iPad
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