Volvo Repair: 1987 volvo turbo wagon w/intercooler, mail man, cat converter

Question
ive had the car for a year and had only minor problems.i started a new job with the 911 center working with address. so i drive it alot like a mail man alot of stop and go driving. im having trouble with it over heating at slow speeds normal driving it works fine.ive put a new radiator on it but it still runs hot.is this a problem that they have.what is the normal temp they run.i no a turbo runs hotter than a non turbo is there anything i can do to cool it down better or do i just need to get another car for the job      thanks nick jones

Answer
Hello Nick,

         How 'bout the thermostat?
          Is the engine properly timed?
        Is the cam,dist.,and crankshaft aligned?
        Make sure that you have unobstructed air flow to radiator.
        Make sure intercooler(a radiator for air to cool)is unobstructed.
        Did you or a previous owner use "Stop leak" to cure a leak?..Not a great idea...it can seal little passages and cause a overheating problem.
      A problem with the cat.converter?...I doubt it.

Bilbo