Remove vent pin from thermostat?

[conner]

did any one ever remove the vent pin from a new thermostat when installed and did it help or hurt?

 

[AZjeff]

No but I've drilled a 1/8" hole in the flange and oriented it up to help burp air out. SOP in 4.0 Jeep engine. Same thing.

 

[D60]

If you've already got a hole with a pin, removing the pin shouldn't help. It can't flow enough water to matter either way -- it's just for air of course.

Now if you enlarge the hole, all bets are off. I realize you're not suggesting this.

 

[Chris142]

No but I've drilled a 1/8" hole in the flange and oriented it up to help burp air out. SOP in 4.0 Jeep engine. Same thing.

Next time remove that heater hose on the housing. Fill through the radiator until fluid comes out the open hole on the housing then put the heater hoses back on.

Now continue to fill the system until full. Put the cap on and run it until its up to operating temp. Shut it off and walk away.

Check and top off after its cooled.

Thats the factory recommend way to burp that 4.0 or 2.5.