In my church if he held a ministry position and was advocating dispensationalism he'd be removed from his office because he would be teaching a doctrine contrary to what we believe. As to what steps of discipline to take that would be a matter for the elders to decide not the pastor. Much of this would depend on the individual and on whether he's just ignorant or disrupting and argumentative.

If he were a lay person who held no ministry position in the church he probably be tolerated unless he made this a matter of contention and disrupted the fellowship of believers. We (and most churches) have members who hold to various views on a variety of topics which are not in agreement with Reformed confessions because they are still learning the basics. You can't remove a student for not understanding good biblical exegesis but you can't tolerate a leader who teaches heresy.


Wes

When I survey the wondrous cross on which the Prince of Glory died, my richest gain I count but loss and pour contempt on all my pride. - Isaac Watts