Article can be found on pages 18-19.
 

The Aftermarket World

The Advantages of Oil Coolers

Cooler oil makes engines last longer, simple as that.

Installation time is measured in minutes, riding time is measured in years.  Here we will talk about the Jagg oil coolers with cutting edge technology to keep your engine cool under the most punishing conditions.  These coolers feature multi-pass oil flow configuration that ensures the oil's utilization of the entire oil cooler.  Specially designed tabulators in each oil passageway gently stir oil exposing it to more critical heat dissipation surface area for superior cooling with minimal increase in oil pressure restriction.  Highly concentrated mini-louvered air fins allow maximum heat transfer.  These oil coolers are sold through Drag Specialties, part #0713-0009 for late model baggers in black for about $150.00, or in chrome for $220.00.  They also make them for all Harley applications.

These oil coolers can be mounted on the left down tube frame and virtually disappear on the bike.  In order to access the oil supply on Twin Cam models, you will need to purchase an oil cooler adaptor.  For 2000 and up baggers it will need to be an offset adaptor (Drag Specialties part #J4600) for about $110.00.  The advance design allows hot oil to go through the oil filter before it is routed through the oil cooler, resulting in less overall restriction and pressure drop.  There is also an oil bypass valve available (Drag Specialties part #J4000B) for about $65.00.  The bypass valve works in conjunction with all oil coolers a manual version of a thermostat.  The compact design blends into the oil lines, offering a less cluttered appearance.  Anti-rotation kits ensure that the oil filter adaptor can not rotate during the oil filter removal (sold separately).  Tools needed for installation for offset oil filter adaptor : 1 inch socket and extension, 5/32 Allen wrench (Snap On part#FABLSE works well), 1/4 inch nut driver, and a medium strength lock tight.

Installation details : Remove spin on oil filter (refer to factory owner's manual, changing oil and filter, for proper procedure).  Clean area thoroughly and disassemble oil filter adaptor by removing the five stainless Allen head screws.  With long/offset end of adaptor at top, place O-ring half of adaptor over the threaded stud that your stock oil filter mounts on and screw in 1-inch lock nut finger tight.  The adaptors flat ceiling rubber O-ring should face in, toward the stock filter mounting plate, and be free of debris (do not apply O-ring oil).  Hold the hose fitting half of the adaptor against the O-ring half of the adaptor and align the screw holes on both halves.  Adjust angle of the adaptor to angle desired orientation.  Ensure proper side-to-side clearance of unit.  Remove hose fitting half of adaptor and securely tighten 1 inch thread lock nut so O-ring half of adaptor will not rotate and ceiling ring is tight against filter mount.  This may require a prying force applied against the adaptor to allow tightening while retaining the chosen orientation.  Note : on rubber mounted models, allow adequate clearance to ensure adaptor will not strike any object while motor is shaking.  Cut two oil lines with a little extra length than needed to route to oil cooler location.  Install lines to hose fitting on outer half of adaptor.  Install and tighten hose clamps.  Note : rotate hose clamps to ensure hose clamp will not interfere with oil filter installation.

Install rubber gasket.  Be sure to line up oil passageway hole and gasket with oil passageway in adaptor.  Attention : gasket must be applied dry.  No additional gasket sealing compound is required and ensure adaptor halves are free of oil residue.  Place hose fitting half of adaptor against gasket and install three Allen head screws on front side.  Install, but do not tighten screws for now.  Install two Allen screws on the back side of the adaptor and do not tighten.  Return to the front side of adaptor and tighten screws firmly.  Return to the back side and tighten screws firmly.  A crisscross tightening pattern is recommended to ensure even gasket surface contact.

Install oil filter, had tighten.  Route oil lines to cooler, no sharp bends or kinks that may restrict oil flow, making sure they are free of filter and any other objects and attach to cooler.

Start bike and check for system leaks.  Allow bike to achieve operating temperature then allow bike to cool.  Retighten Allen head screws.  This is a particularly important step to ensure gasket does not suffer from (torque loss) due to expansion/contraction during heating/cooling cycles.  Note: oil flow direction from adaptor, oil feeds cooler from fitting on left side, as viewed from front of hose fitting half.  Oil returns to fitting on right side, as viewed from front of hose fitting half.  The off set oil filter adaptor is designed to access oil supply for installation of an oil cooler, any other use is not recommended.

Information gathered from Setrab Oil Coolers Co.

Until next time, be cool!