Your temperature problem is caused by trapped air in the coolant lines. You will have to air bleed the cooling system or purchase an air bleed bypass (overheat protector) to correct this problem. "We're here to help you" DMC Joe / De Lorean Services / <dmcjoe@xxxx> Web Site: <www.deloreanservices.com> . ----- Original Message ----- From: rpcarrington <rpcarrington@xxxx> To: <dmcnews@xxxxxxxxxxx> Sent: Sunday, April 16, 2000 10:40 PM Subject: [DML] temp. guage > Hi group. My question. While driving my temp guage needle will jump from > about middle of first lines to just under 220 mark. It might stay there or > just as suddenly drop back down . Any ideas as to the cause? Thanks. Bob > #20003 ( When I say suddenly, I mean instantly)