[TR] Valve ticking

[DAVE HOGYE]

I recently went through a process of measuring the full opening capability of multiple sets of used rocker arms in order to put sets together that open the valves the same and as far as possible for competition use.  I didn't bother with any that had excessively worn tips or bushings.  I found .026" difference in the full open position.  That's a lot of variation from the factory.  I also found similar variation in a new set of rockers that I bought from a west coast distributor.  Obviously the manufacturing process is not very accurate.  The sets are re-bushed and then checked again.
I remove excess material from the rockers and polish them.  
Dave H.

> On 07/29/2022 12:53 PM Christopher A Kantarjiev <cak at dimebank.com> wrote:
> 
>  
> On 7/29/22 11:00 AM, triumphs-request at autox.team.net wrote:
> >   You'd have to have a very slim feeler gauge to adjust them correctly.
> 
> Indeed. I have a feeler gauge set that is round wires rather than flat 
> blades, and it makes this measurement a lot easier. But if your rocker 
> arm tips are wearing unevenly, you've probably gone through the hardened 
> surface (and might also be getting wear on the bushing that you can't 
> see) ... so it might be time for a rebuild. More about that in a second ...
> 
> I use a tool called Gunson Clik-Adjust to set valve clearances, because 
> it takes the entire wear of the system into account. Rather than 
> measuring only the clearance at the tip, it works from the point where 
> the entire rocker arm system is tight against the valve stem and then 
> backs out in a controlled fashion. It seemed hokey, but it works quite well.
> 
> When I first got my TR4A, it had really low oil pressure. I did a bunch 
> of work on the bottom end, to little effect. Someone suggested the 
> rockers - the shaft and bushings were *very* worn to the point that much 
> of my oil pressure was disappearing there. I sent the assembly off to 
> Rocker Arm Specialists in Northern California; they transformed my worn 
> out rocker train into a thing of beauty. I sent them a lot of work over 
> the years (and sent a lot of others their way). Sadly, the proprietor 
> sold the business in order to retire, and the new owners didn't make a 
> go of it ... but it appears that they're back!
> 
> http://www.rockerarms.com/pages/about.html
> ** triumphs at autox.team.net **
> 
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