You fill the lifters with oil before inserting them either by soaking for a day or pushing oil into the hole.
You get a coathanger or similar.
You cut a bit about 200MM long.
You bend over the end to a right angle for about 5MM
You file the end to AFAIR 20thou thick.( that is the outside of the 90degrees to the inside of the 90degrees)
You turn the engine so that the lifter is on the heel of the cam with heads on and pushrods in place..
you then try to insert the filed end between the plunger of the lifter and the circlip.
Do that 16 times and you are done.
Don't worry if they are over 20 thou too much as they can be up to 50 thou .
If one is well under 20 thou then you have to shim under the rocker post on that side of the engine so that the smallest gap is over 20 thou. If over 50-60 thou you should machine the rocker pedestals.
There are no real shortcuts that I know of anyway.
To be sure I checked with "Tuning Rover V8s by David Hardcastle" and the above is correct although he states 60 thou max but 40 thou ideal.
Regards PhilipA
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