1983 Other GMC Models air bubble?

1983 GMC
35,000 MILES • V8 • 2WD • AUTOMATIC
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BIGLIN84
  • MEMBER
  • 1 POST
hi,i just put an aluminum radiator in my caballero.it has a crate motor-ram jet 350.i also put in a new 180 thermostat.i seem to have an air bubble in the motor,as the temp goes from 170 to 200 as i drive around my block.it goes up and down 3 time every half mile.i check the rad temp w/a laser meter it was 100 degrees. only the motor temp is going up and down.does that sound like air and how do i get it out? thanks,steve
Nov 28, 2008 at 11:34 PM
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DOCFIXIT
  • Experienced Mechanic
  • 18,828 POSTS
Is top of motor higher than rad cap ? If not jack up front truck cap of run it till all air is expelled.
Nov 29, 2008 at 7:56 AM
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