Update I offer thanks to Bob Blick and others who offered suggestions. After replacing the thermostat ( the old one looked fine ) ..... the engine= ran hot one time after that change. It has never overheated again. I ha= ve no explanation for this. 99guspuppet --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .