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Overdrive Pressure Test
- Thread starter Mag9
- Start date
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What you need to do is best done with a spare valve cap. The spring and ball must remain functional and in place. Take the spare cap and drill a hole in the top, braze or weld an adapter to install a 0 to 500 psi gage in to the cap leaving the hole open to the gage. Just install this inplace of the unmodified cap. As you can see the cap has a recess in it that needs to remain intact for the spring and ball.
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Healey Nut
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Me being a refrigeration HVAC guy . I have a schrader fitting welded onto my plug so no need to change caps . Just take of the dust cover cap install gauge , check pressure 