preload question on lifters that are already full of oil

[sidewaysbo]

hi fellars quick question please any help appreciated i have changed my headgaskets and headbolts , i have v8 dev stage 3 heads and a typhoon cam and adjustable pushrods standard lifters that have already been run in my engine the cam and lifters were perfect so not changing them only done 200 mls,, im sure ray at v8d said he fits 25thou washers under the rockerposts then adjusts the pushrods then remove washers ,but i cannot remember if he said i need to also set a 25thou gap between the lifter piston and the wire clip that keeps the lifter piston in , the fact they have already been used and have oil in them i didnt know if that matters sorry if i sound confused but i am lol cheers bo

[sidecar]

I would not bother with V8's method it sounds rubbish!

One complete turn of the adjuster is worth around 30 thou so try this..

Turn the engine by hand so that the lifter you are trying to adjust is on the base circle of the cam, then carefully turn the adjuster so that all of the play is out of the pushrod BUT so that it has not applied any pre-load. Then turn the adjuster noting how the flats of the nut on the adjuster line up with the nut braised into the pushrod, 5 flats will be 25 thou. (5/6's of a complete turn)

It won't matter that the lifter is full of oil, it will either be squeezed out or the valve will lift off its seat a small mount until the oil does bleed out which I think can only happen when the lifter is on the base circle.

It will take about 1 hour to do all the pushrods. Doing the above will result in a 25 thou pre-load which is a good figure to go for. (I won't bore you with why but it is possible to run into problems if you run a lot of pre-load)

Its a piece of piddle!

[sidewaysbo]

thanks bo