[Fot] Dual Valve Springs

[walt at hot-tr6.com]

I have replaced broken springs on my TR6 racecar without removing the  
cylinder head. First do a compression check to confirm that there is  
no internal damage to the combustion area. Run the piston to the top  
of the cylinder you are working on. Then do as you stated to replace  
springs, retainers, keepers. I also found that a bent slender  
screwdriver works inserted through the spark plus hole to keep the  
valve you are working on from slipping down. Roller rockers are nice.  
I use a double roller rocker setup and i like it.
Walt Hollowell of Albuquerque, New Mexico responding from Nevis Island  
in the Carribean.

Quoting "Tylerpthompson at yahoo.com" <Tylerpthompson at yahoo.com>:

> 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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