hey my b16 started to over heat the other day. it had no heat at the time so i thought that it could be the thermostat. after replacing the t.stat, i took out the rad and checked for flow to see if there was any clogs. than i bleed the system of all air bubbles by cracking the bleeder screw. after that i ran the car to make sure everything was ok. after running it for a while the buttom rad hose didnt get hot nor did the fans come on. the coolent started to boil out of the rad. i really think this is a headgasket problem. has anyone had this problem and can say its the headgasket before i start to replace it.

 

if the fan didn't come on check your thermostat switch. it may be bad.

 

You may still have air trapped in the cooling system. Rebleed.

Bleeding the cooling system:

1) Park the car on an inclined driveway with the front end higher than the rear.

2) Push the dash heater lever/**** to MAX heat.

3) Follow the directions in the diagram below (hint: the bleed bolt is located where the upper radiator hose connects to the engine):

 

thanks ill have to check the t.stat switch i also did that procedure to make sure there was no air in the system but it just boiled out when i removed the cap and was shooting coolent into the sky lol

 

Was the engine cold or already hot when you started bleeding the system? If the engine was cold, then you may have a blown head gasket that is allowing pressured exhaust gas into the cooling system. If the engine was hot, then try the procedure again with a cool engine.

 

it was cold i think im just goin to pull the head does anyone kno the torq specs for tighting the head bolts again i think the cam hold down bolts are like 17ftlbs not even sure

 

Where did you buy the Thermostat? If you're using kragen/chucks/autozone/pep boys etc then U probably have a faulty one. Take the thermostat out all together and see if the problem persists... Are you noticing any type of "white" smoke come out the exhaust (indication of a blown headgasket)? And also take a look at the oil cap, is it all milky and nasty or is it black (obviously b/c the cap is black or "brown" if you have clear cap ) like normal oil cap would normally be?