i just found out that i might hav eto bleed my colent systema nd thats why i am not getting heat.does anyone have a write up on this.some pls ay blled it by some screw on teh fire wall soem say a srew on teh block some say a screw on teh thermostat houseing. i never saw so many undecided ppl before.the sr20 forum is like a married couple just cant agree.

When filling the cooling system, set heater control to max hot and remove the bleed screw on the thermostat housing until water runs out, then replace the bleed screw and fill up the radiator and reservoir tank to the max line. Now you need to modify the rad cap by putting a piece of wire or similar between the rubber and the metal centre bit.(it lets the air bleed out into the overflow tank) Fit it to the radiator. Start the engine warm it up and run it a 2500rpm for 10secs, turn off, fill up the radiator. Repeat 3 times.
Remove wire from rad cap and refit it as standard item. Run engine at 4000rpm and move heater control to a few positions between hot and cold , then check level again. (rad will be pressurised this time, so let it cool down or cover the rad cap well)

although i never do it that way because im forever dropping the poxy bleed screw