I have a ported/head cut down 01' SRX 700 that is running hot. It's reaching 150 degrees running down the hard pack at speed. My big problem is when I come into town and slow down it climbs to 185 or so. What temp should I become concerned about, is 185 alright? I am full of coolant and all my heat exchangers are getting hot. Is it possible that I have an air pocket but it is still circulating?