Thread: Unsettled Oil Pressure

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If it is a mechanical gauge, try "burping" any air from the line from the block to the gauge. To do it, with the engine running, crack open the connection at the back of the gauge and slowly let the air out, if it's the plastic tube, you can watch the air/oil line rise towards the gauge.

It's not always needed but, getting the air out helps to stabilize the gauge "signal", the air "bounces" the signal as it compresses and expands. This is S.O.P. on our Waukesha diesel generators with "Murphy" safety gauges, ( the gauge has the ability to shutdown the engine). It may help in this case. Worth a try as it won't cost a dime! OH, keep plenty of rags handy if you open the connection to far / to fast it can get messy!