Autometer 2-1/16 Ultra-Lite W

OVERVIEW

Precision and reliability are the cornerstones of high-performance engine monitoring, and the AutoMeter 2-1/16 Ultra-Lite Water Temperature Gauge (ATM4331) stands as the industry benchmark for racers and custom builders alike. Designed with a lightweight aluminum construction that significantly reduces mass, this gauge is a staple in the motorsports world where every ounce matters. The iconic satin anodized aluminum dial face paired with the high-contrast bright red fluorescent pointer ensures that you can monitor your engine''s thermal health at a glance, even in the most demanding high-vibration environments. Whether you are pushing your rig through the dunes or navigating a tight autocross course, the Ultra-Lite series provides the professional-grade accuracy you need to protect your investment from overheating.

For the air-cooled enthusiast venturing into the world of water-cooled conversionssuch as Subaru swaps or VW 1.8T transplantsthis gauge is an essential component of a modern dashboard. While traditional air-cooled Volkswagens rely on oil temperature, modern performance builds and radiator-cooled buggies require the instantaneous and precise feedback that only a high-quality electric short-sweep gauge can provide. This unit features AutoMeter''s legendary core-magnet movement, ensuring that the needle stays steady and responsive. Complete with an 1/8 inch NPT sender and multiple adapter fittings, this gauge is designed for a seamless installation into your custom dash or gauge pod, offering a clean, race-ready aesthetic that complements any performance interior.

FITMENT

This is a universal 2-1/16 inch (52.4mm) gauge designed to fit standard mounting holes. It is commonly utilized in the following Volkswagen and custom applications:

• VW Beetle (Type 1): Ideal for custom dashes or center consoles in water-cooled engine conversions.
• VW Super Beetle: Fits perfectly in aftermarket A-pillar pods or under-dash mounts.
• VW Bus / Transporter (Type 2): Essential for monitoring coolant levels in Subaru or TiCO engine swaps.
• VW Karmann Ghia: A popular choice for Resto-Mod builds requiring modern instrumentation.
• VW Type 3 (Squareback/Fastback/Notchback): Fits standard 52mm aftermarket gauge cutouts.
• Dune Buggies & Sand Rails: Robust enough for off-road use in custom radiator-cooled chassis.
• Baja Bugs: Provides critical thermal data for high-output modified engines.

SPECS

• Product Series: Ultra-Lite
• Gauge Type: Water Temperature (Coolant)
• Diameter: 2-1/16 inch (52.4mm)
• Range: 100 to 250 Degrees Fahrenheit
• Operation Type: Electric Short Sweep
• Dial Color: Satin Anodized Aluminum
• Pointer Color: Red Fluorescent
• Bezel Color: Brushed Aluminum
• Lighting: Perimeter Incandescent (Bulb and Socket Assembly Included)
• Included Sender: 1/8 inch NPT Electric Temperature Sender
• Included Adapters: 3/8 inch NPT and 1/2 inch NPT mounting adapters
• Voltage: 12 Volt DC compatible

PRO TIPS

Tip 1: Ensure a Solid Ground for Accurate Readings

Since this is an electric gauge, its accuracy is entirely dependent on the electrical resistance through the sender. In many custom VW builds, specifically those with powder-coated frames or heavily painted engine blocks, the sender may not achieve a proper ground through the threads. If your gauge is pegged or giving erratic readings, run a dedicated ground wire from the sender body to the chassis. Always ensure the gauge itself has a clean, dedicated ground to the dash or battery to prevent needle flutter caused by electrical noise.

Tip 2: Use Thread Sealant Sparingly

When installing the 1/8 inch NPT sender into your engine block or coolant manifold, be extremely cautious with Teflon tape or heavy thread sealants. The sender requires a metal-to-metal connection with the engine block to complete the electrical circuit (the ground). If you wrap the threads too thickly with tape, you can insulate the sender, resulting in a "no-read" or inaccurate temperature signal. We recommend using a small amount of liquid conductive thread sealant or only wrapping the top two threads to ensure a leak-free seal without breaking the electrical path.

Tip 3: Optimize Visibility with Bulb Covers

The AutoMeter Ultra-Lite series comes standard with white incandescent lighting, but it also includes red and green bulb covers (boots) in the box. For a classic VW look that matches early VDO gauges, many builders prefer the green covers. However, for night racing or long hauls, the red covers are much easier on the eyes and help preserve your night vision. Before final installation in your dash, test the different colors to see which matches your existing interior lighting best, as the Ultra-Lite face reflects colored light very effectively.