[Fot] valve shims and springs

[Brian Schirano]

I correct myself, hardened spring seat, but titanium keepers

https://www.goodparts.com/product/valve-spring-seat-1-125-x-585-x-040/

On Sat, Apr 18, 2020 at 12:48 PM Chris Marx via Fot <fot at autox.team.net>
wrote:

> Hi Dave,
>
>
>
> these shims need to be hardened steel.
>
> On my TR4 I use no shims. The cast iron is a good surface for spring
> rotation.
>
> On the TR8 with the aluminum head there are shims. The first set was
> squeezed out after a few races, they were too soft.
>
> The second set of shims was nitrate hardened and they last.
>
>
>
> Cheers
>
> Chris
>
>
>
>
>
> *Von:* Fot <fot-bounces at autox.team.net> *Im Auftrag von *DAVE HOGYE via
> Fot
> *Gesendet:* Samstag, 18. April 2020 17:33
> *An:* Friends of Triumph <Fot at autox.team.net>
> *Betreff:* [Fot] valve shims and springs
>
>
>
> Hello Friends,
>
> I've removed and disassembled my TR3 engine after 7 years, 19 race events
> and about 5500 miles since it's completion.
>
> The crank and cam look excellent as do the bearings, both mains and
> rods.
>
> One thing I found was that some of the valve spring shims were
> disintegrating.  There are two different types of shims, one golden/yellow
> and one plain silver. The problem is that the silver ones are heavily worn
> from the springs tearing them up.  The golden yellow shims look as
> installed, with no visual wear and they don't seem to have been rotating.
> It obvious the springs over the silver shims were rotating and causing the
> heavy wear.  Perhaps these shims are too soft.
>
> Can someone enlighten me on this?
>
> In the garage on lockdown,
>
> Dave H.
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>
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>

-- 
Brian Schirano
585-305-0349
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