BCNUL8R

iTrader: (2)

I'm looking at the Isky silver series hpx hydraulic roller lifters part# 2076hyrt. Does anyone know the recommended preload range for this lifter?

01CamaroSSTx

iTrader: (3)

1/2 turn from zero or .040

BCNUL8R

iTrader: (2)

Thank you. Do you know if the recommended range is .040 +/- .010 ?

01CamaroSSTx

iTrader: (3)

1/2 turn from zero lash with an adjustable or .040 preload factored into the pushrod for non-adjustables. That is the recomended preload for those lifters

BCNUL8R

iTrader: (2)

Everything has to have a tolerance (upper and lower specification limits). No one is hitting dead nuts on 0.040 on every lifter with non-adjustable rockers. I get 0.040 is nominal. I'm trying to see how much variation I'm allowed using pushrod length to achieve the desired preload with non-adjustable rockers.

MuhThugga

I have the silver HPX lifters in my LT1. There was a piece of paper that came with my lifters that dictated the range. I'll have to look it up when I get home today, but I remember it being along the lines of .030" - .045".

EDIT: I just checked some documentation I had online and the range is .030" - .040".

BCNUL8R

iTrader: (2)

Thanks man that is what I needed to know.

IGN-1A

Those here MAY want to know what is the best "preload".
There IS a difference when an Iron (LSX) crankcase OR an AL crankcase is specified ?

01CamaroSSTx

iTrader: (3)

Best advice is to call ISKY Camshafts and see what they tell you.

BCNUL8R

iTrader: (2)

Aluminum block 377”.