jettin169

Stupid question, but which way does the thermostat go in the housing???!!!

jettin169

Right now, I think I have the spring facing the block... but I get no water circulation... I just rebuilt my 5.0 and can't remember which way it goes in..??

fordguy17

yea. spring into the intake manifold.

do you have water in the intake manifold?

you have to burp the system of air..

5IVE.OH

That's the correct way. Did you put your belt back on

jettin169

The belt is on but I get no pressure in the upper coolant hose. How do I burb the system?

7upedition

Could you define rebuilt? Because birping a coolant system and thermostat posistion is pretty basic considering your an engine rebuilder!

Anyhow, jack the front of the car up, place on jack stands, (or park on a hill), and open the rad cap, turn the car on, allow to run and add coolant as neccesary, the system will flow once up to temp, and then squeeze the upper radiator hose(the one that crosses over the alternator) a few times and the air will rise from the system and escape through the rad cap...

Blckstng93

There should be a hole on the lip of the thermo, make sure its pointed up.