Mechanical Water Temperature Gauge Installation Instructions - Capillary Tube

This document is a service/installation procedure page (Section C: Mechanical Temperature) for installing a mechanical water temperature gauge with a capillary-tube sensor. It provides five numbered steps: routing the capillary tube through an existing or newly drilled 7/8" (22 mm) firewall hole protected by a rubber grommet; passing the tube through the firewall; removing the vehicle's existing temperature sending unit and installing a proper-size adapter and the temperature sensor with its sensor nut; securing the capillary tube along its route to avoid damage from sharp edges, moving parts, or hot components; and reconnecting the negative battery cable, running the engine, and checking for leaks. A prominent caution warns that the capillary tube is a sealed, pressurized tube filled with Ether gas and must never be cut or removed from the gauge port, and not to rotate the sensor or tube while tightening the nut. Figure 7 illustrates the mechanical water temperature gauge connections, labeling the optional grommet, capillary tube, sensor nut, optional adapter, temperature sensor, and engine block, with a footnote to use Teflon sealing tape on noted thread joints. A note states adapters for most Domestic and Asian vehicles are included in the kit, with additional adapters sold separately.