Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Install Engine Oil Pressure Gauges

    • 1). Locate the 1/8-inch or 1/4-inch pipe tapped hole in the engine block of the vehicle to install an oil gauge. There may be a sending unit installed in this tapped hole. If there is a sending unit installed, unplug the wire and remove the sending unit.

    • 2). Thread an 1/8-inch or 1/4-inch brass fitting with an 1/8-inch compression tube fitting into the oil pressure tapped hole.

    • 3). Drill a small hole in the cowl and insert a grommet where the oil line will enter the passenger compartment and where the oil gauge will mount under the dashboard.

    • 4). String an 1/8-inch copper line, or equivalent line supplied with the gauge kits, from the tapped hole in the engine block to the bottom of the dash or wherever the gauge will be mounted. Insert the copper tubing into the brass compression fitting in the engine block and tighten it.

    • 5). Insert the other end of the copper tubing into the back of the oil pressure gauge and tighten the compression fitting. With plastic tie straps, secure the oil pressure line to various under-dash brackets to prevent damage to the line.

    • 6). String the power wire from the gauge light to an accessory spade located in the fuse box. Be sure to connect it to the accessory side of the fuse box so that the light is on only when the key is in the "On" position.

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