There is an o-ring on top of the cooler than is known to fail in cold
weather.  I have new ones in stock to replace it.  Let me know if you want to
try this route.  The seal is only a couple of dollars.  I also have the oil
coolers themselves available for $99 new.

Thanks,
Ken Wilford
http://www.vanagain.com
John 3:16

New Phone (856)-327-4936
Shop: (856)-765-1583
Fax:     (856)-327-2242