06-26-2009, 03:39 PM
I have a 1993 4JH2E that had a pin hole leak in a freeze plug about two years ago which I cleaned and plugged with epoxy putty and added new antifreeze. I still have a very slow leak from it and now another plug which amounts to a few table spoons per month. Use is only about 100 hours/year. Any stop leak products that can be added and how often should antifreeze be changed? Use in NW USA.