It shouldn't change anything unless you used the sending unit that was in the new engine. If you did, it could be sending more power to the gauge and causing it to appear to be overheating. What you need to do is rent or borrow a thermometer designed to read over 250 degrees. When the engine is cool, open the radiator and place the thermometer in the top of the rad and let it heat up. THe temp shouldn't get much above 200 degrees. IF the gauge says it's overheating and the thermometer says 200, you know there is a problem with the sending unit.
Let me know how it works out for you.
Saturday, June 6th, 2009 AT 11:31 PM