Oil Filler Extension, with Breather Vent, Polished Fits VW

OVERVIEW

Elevate your engine bay''s functionality and aesthetic appeal with the EMPI Polished Oil Filler Extension. Designed specifically for the classic air-cooled Volkswagen enthusiast, this extension solves one of the most common headaches found in custom engine builds: the struggle of pouring oil into a cramped or obstructed stock filler location. Whether you are running a high-performance dual-carburetor setup that crowds the center of the engine or you simply want to make routine maintenance a cleaner, spill-free experience, this extension provides the necessary height and accessibility. The unit features a precision-machined screw-on cap that ensures a positive, leak-proof seal, replacing the often-fussy stock twist-on caps that can loosen over time or leak under the high-vibration environment of a flat-four engine.

Beyond its convenience, this oil filler extension is a critical component for managing crankcase ventilation in performance VW engines. It comes equipped with an integrated breather vent port, allowing you to easily route internal engine pressure away from the crankcase and toward an external breather box or your air cleaners. This is a vital upgrade for larger displacement engines, as it helps prevent the common "VW oil sweat" often seen at the crank pulley or pushrod tubes caused by excessive internal pressure. The high-luster polished finish adds a professional, show-ready look to your Type 1 or Type 2 engine, perfectly complementing chrome or polished aluminum accessories. It is more than just a dress-up piece; it is a functional upgrade that improves engine longevity by facilitating better ventilation and easier oil service for any serious VW builder.

FITMENT

This oil filler extension is designed for use on air-cooled Volkswagen engines with a standard alternator or generator stand. It is compatible with the following models:

• Volkswagen Type 1 Beetle / Bug: 1950 through 1979 (Standard and Super Beetle)
• Volkswagen Type 2 Bus / Transporter: 1950 through 1971 (With Type 1 Upright Engine)
• Volkswagen Karmann Ghia: 1956 through 1974
• Volkswagen Type 181 Thing: 1973 through 1974
• Custom Applications: Fits most Dune Buggies, Sand Rails, and Trikes utilizing 1200cc, 1300cc, 1500cc, and 1600cc based air-cooled engines.

SPECS

Each unit is manufactured to EMPI''s rigorous standards for fitment and finish. Below are the technical specifications for this component:

• Material: High-Quality Cast Aluminum
• Finish: High-Luster Mirror Polished
• Cap Style: Threaded Screw-on with O-Ring Seal
• Vent Size: Integrated 1/4 inch NPT internal thread for breather fittings
• Height Extension: Approximately 3 inches over the standard stand height
• Mounting: Mounts directly to the existing alternator/generator stand via the internal baffle nut
• Compatibility: Works with both 12V Alternators and 6V/12V Generators

PRO TIPS

1. Ensure a Perfect Seal at the Base

When installing this extension, it is imperative that you use a fresh paper gasket between the base of the extension and the top of the alternator/generator stand. Over-tightening the internal baffle nut can sometimes crack the aluminum base if it is not seated perfectly flat. We recommend applying a very thin smear of high-temp RTV or aviation-grade gasket sealer to both sides of the paper gasket. This ensures that even as the engine goes through heat cycles, you won''t experience the annoying oil seepage that often plagues improperly installed oil fillers. Always use the correct VW oil filler nut tool to tighten the internal nut to prevent marring the internal surfaces.

2. Optimize Your Breather System

The integrated breather vent on this extension is a game-changer for high-revving engines. To get the most out of it, don''t just leave it open to the atmosphere, as this will eventually coat your engine in an oily film. Instead, run a 3/8-inch or 1/2-inch ID hose from the vent port to a dedicated breather box or to the underside of your air cleaners. This creates a closed-loop system that allows the engine to "breathe" without making a mess. If you are running a high-compression or large-stroke engine, combining this filler vent with vented valve covers will significantly reduce the risk of blowing out your main seals due to crankcase pressure buildup.

3. Maintaining the Show-Quality Finish

Aluminum is a porous metal, and even though this unit comes with a beautiful polished finish, it can dull over time due to heat and road grime. To keep it looking like new, avoid using harsh degreasers or acidic cleaners directly on the polished surface, as these can cloud the finish instantly. Instead, use a soft microfiber cloth and a dedicated aluminum polish once every few months. If you are performing an oil change and happen to spill, wipe it off immediately; the chemicals in modern synthetic oils can sometimes stain the polished aluminum if left to bake under the heat of the engine tin. A little bit of preventative maintenance goes a long way in keeping your engine bay looking top-tier.