her838a2 wrote (
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I have modified and installed at least a dozen of these oil
coolers. I am currently taping the existing oil passage with the
same npt tap that I use for the two new holes in the outside of the
cover. I buy pipe plugs from NAPA 1/8 npt plug. I like the pipe
tread because its tapered. I install the slotted plug with a
screwdriver and I use blue tread lock. I have logged thousands of
miles with the current design with no problems. I've tried a
lockhart cooler with a built in thermostat, but can't find a
suitable place for the cooler. The Virago just doesn't have enough
room. The inline thermostat from lockhart BP 180 does a good job.
The existing oil passage in the cover must be plugged. This
method is more effective than the oil flow adapter that derale
supplied years ago. The orignal adapter had a O ring that would be
subject to failure and lose at each oil change. Permanently plugging
the hole below the return tap is a permanent solution
TH