I'm getting ready to install my Boone Dizzy and wanted to set the valves
before I started. Unfortunately, I still have enough of the engine removed
that I can't run the engine yet and set them hot.
1. Should I just wait until I can run it and set them hot?
2. If I can and or should set them cold, what are the setting for a cold
engine?
Brad Holmes
Hi Brad,
I would advise doing a cold setting.
The valves should be at spec. before you attempt to crank the engine.
Valve clearance: -
Intake 0.2mm[0.007874"]
Exhaust 0.3mm[0.011811"]
These are HOT values but as Kubla Khan once said, "You gotta start
somewhere!"
Below is a quote from page 20 of the Nissan U20 Engine and 5 speed
transmission Service Manual: -
CAUTION:
DO NOT adjust the valve clearance with the engine running because the rocker
arms and valves are forcibly lubricated from camshaft oil gallery.
So, hot engine yes, running engine NO!
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