Yesterday i swaped a motor into my 89 Si for a 90 Si motor with about 30K miles... this motor has been sitting around for about 4 years or maybe 5... well.. i swaped it in... and it took a few cranks to start it but it finally started... when i was driving it home the temperature would always go up to almost the H on the temp gauge... .i started the heater inside the car to try to lower the temp but the heater was only throwing cool air.. it seemed like the heater was never working... what can i do?? i checked the radiator and its still full... any help??
thanks

 

is your fan running?? if its not, check your thermostat

 

if it sat that long, its most likely the thermostat.

 

thurmo is fuct, buy a 72* one from napa, their 14$ and fan will never kick in (usually) and the car will run bout 1/3rd of the way up on the temp guage

 

Thanks guys.. i will be changing the thermostat like you guys say... ill get it at napa.. thanks...