Quote:
Originally Posted by D. Hake 4459
If the gauge on the cowl is liquid filled, there should be a screw somewhere around the top of the gauge. Loosen that screw and let it sit for a few minutes and that should equalize the pressure from the inside of the gauge to the outside. It has to do with temperature and barometric pressure. Derek
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Not oil filled. Just real old. Its been on the car since I built it 37 years ago.