just got the 7 a few min ago and was woundering why the temp guage is only just above the cold mark and has no hot air in the driver area.
Thanks

 

If its an 86-88, then the temp gauge is normally only 1/4 of the way up. If thats the case, then the heater isn't blowing hot because the heater core is clogged.

 

If the temp gauge don't go up and you have no heat the previous owner might have taken out the thermostat.

 

Overcooling, failed gauge.

Most likely overcooling due to a failed thermostat, replace it with a Mazda OEM one and you'll be fine.

 

check your connections to the Water temp sensor.Also check the Coolant.If it is Down make sure that when you are filling it,that you get all the air out of your Cooling System,Or else you Will NOT get Heat..When filling the Cooling system,Try Turning the Heater to Full Blast..having it on will Make the Coolant Circulate into the Heater core as the Thermostat on the Engine opens..Keep filling as much as possible,after the Engine thermostat opens,and If you can squeeze the Upper and lower rad hoses so that they Help to Force any air out.Once you cannot Pour anymore Coolant in,and the heater Inside is blowing Good,Check the Gauge..Make a Mental note of it..Fill the Overflow bottle to it's mark and go for a drive.Later on,when the car has cooled down Recheck the Coolant.Top up if necessary..you shouldn't hear a Low Level buzzer if you have done the Fill correctly..If you hear it..you have air..or are loosing coolant somewhere..either Outside or Internally..GOOD Luck Canuck!

 

thanks for the info I will check everything today and let you know how it went.
oh and what do people mean when they say that is was converted into a 5 bolt.

 

4-bolt wheels, brake rotors and hubs converted to 5-bolts, which some versions came with (Sport, GXL (luxury trim), and TurboII). Almost always includes going with the 4-piston calipers up front (instead of 1-piston). The swap also can include the slightly different rear calipers which use vented instead of solid rear disks. Purists will say you should also change the Master Cylinder and Brake Booster, but it is not mandatory.