Engine Water Temperature
You Gotta Know What's Going On
FYI: A good temperature for a classic Chevy engine is usually 160 to 180 degrees. If you reach 200 when siting, but the temperature reduces when driving that is O.K.
Installing a Water Temperature Gauge
- When installing an electrical water gauge, a special sending unit must be installed to the engine. Small-block Chevys have pipe plug fittings in each cylinder head and most intake manifolds.
- Before starting the installation drain the the coolant before removing the plug.
- A 18-gauge wire is used to create a suitable ground for the electrical gauge.
- Connect the sending unit to the terminal marked “S” for sender on the gauge.
- Connect a switched 12-volt source to the terminal marked “I” for ignition.
- The wire to the engine will be routed through the fire wall. A rubber grommet must be used to prevent chaffing.
- When installing a mechanical water gauge a special sealed tube relays engine temperature information to the gauge.
- The fitting will require a larger hole in the firewall to route the tube.
- With mechanical temperature gauges pass the tube through the gauge panel first. a rubber grommet must be used. If you don’t you might have hot water spraying on your feet.