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Ruth · 09-22-2021, 04:15 PM

Per the chart Y-Blockhead posted in the other thread on vacuum gauges, a pulsating needle indicates loose valve guides or carburetor out of adjustment. Or if really swinging it could mean a leaking head gasket.

09-22-2021, 04:15 PM	#20
Ruth Senior Member Join Date: May 2016 Location: Glide, Oregon Posts: 1,342	Re: Vacuum Gauge (new) Per the chart Y-Blockhead posted in the other thread on vacuum gauges, a pulsating needle indicates loose valve guides or carburetor out of adjustment. Or if really swinging it could mean a leaking head gasket. __________________ Ruth "Sometimes you really DO need to read the whole thread"