Temature gauge slowly moves to hot
I recently bought a 2002 Nissan Altima. I just had
my catalytic converter punched out, head gasket
replaced and new spark plugs put in.But now the
temperature gauge moves slowly to hot,but there
is no smoke and all fluids are leveled. When I turn
on the heat, the gauge comes back down to the
half way mark.What could be my problem?