Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
Oil flow through the cooler is thermostatically controlled, you shouldn't have any meaningful flow when cold. The thermostat is under the filter housing.
Check the crankcase breather, if this is obstructed, crankcase pressure can force oil out of the rear main seal.