Heat is the primary enemy of any air-cooled Volkswagen engine, especially when you start pushing for more displacement or higher performance. The EMPI 8-Pass Oil Cooler Kit is engineered to be the ultimate solution for enthusiasts who refuse to let rising oil temperatures limit their driving experience. This isn''t just a simple radiator; it features 1/2-inch copper tubing and high-density aluminum cooling fins that are joined using a mechanical expansion process. By physically stretching the copper tubes to make absolute contact with the fins, this cooler maximizes thermal transfer and heat dissipation far more effectively than standard "sandwich" style coolers. This design ensures that your oil stays within the optimal operating range, protecting your bearings, lifters, and case from the devastating effects of thermal breakdown during long summer cruises or spirited canyon runs.
What truly sets this kit apart is its comprehensive nature, providing everything you need to transition to a high-performance external cooling system. Included in the package is the EMPI single oil pressure booster kit, which helps maintain consistent oil pressure even as temperatures fluctuate. You also receive a remote oil filter bracket and bypass adapter, allowing you to move to a full-flow style filtration system that traps contaminants much better than the original stock screen. The kit is rounded out with high-temperature 1/2-inch hose and all necessary barbed fittings and hardware. By relocating the cooling and filtration away from the engine case, you are not only lowering oil temperatures but also increasing the total oil capacity of your system, providing an extra layer of safety for your prized VW powerplant.
Tip 1: Strategic Mounting for Maximum Airflow. When installing your 8-pass cooler, placement is everything. For the best results, mount the cooler in a location that receives constant, high-velocity airflow, such as under the rear luggage tray on a Beetle or near the frame horns on a Buggy. Avoid mounting it directly against a flat sheet metal surface; instead, leave at least an inch of air gap behind the cooler so that the air can actually pass through the fins rather than just hitting them and stalling. If you are running in extremely hot climates, consider adding a dedicated electric puller fan to the cooler for low-speed cooling.
Tip 2: Proper Hose Routing and Protection. When routing your high-temperature oil lines, always ensure they are secured away from moving suspension components and the extreme heat of the exhaust headers. Use rubber-lined "P-clips" or zip ties with protective sleeves to prevent the hoses from chafing against the chassis. Remember that as the engine moves on its mounts, the hoses will flex; always leave a bit of slack in the lines to account for engine torque. Double-clamping the barbed fittings with high-quality stainless steel clamps is a cheap insurance policy against leaks and high-pressure blow-offs.
Tip 3: Pre-Fill Your System and Filter. Before your first startup after installation, always pre-fill the new oil filter and, if possible, the cooler itself. Adding an external cooler and remote filter significantly increases your engine''s total oil capacity. After the initial run, let the engine sit for a few minutes and check your dipstick level again. You will likely need to add an extra quart or more of oil to account for the volume held within the 8-pass cooler and the new lines. Checking for leaks at the bypass adapter and filter bracket during this first heat cycle is critical to ensuring long-term reliability.