Air Locked- Coolant system

[Iowa409]

Hey guys is there a method to get the air out of the system? I have this spot on my Tstat housing. Could I bushing it down and put a petcock there? Or would that be on the wrong side of the problem.

 

[Jim Sullivan]

You could drill a 3/16"-1/4" hole in the thermostat to allow air to bleed out of the block before the t-state opens. Once the thermostat opens, the coolant circulation should work any additional air out of the block. In most cases, just running the engine purges the air out of the heater core also, on these older engines.

 

[Don Jacks]

Go to the back of the intake manifolds and remove one bolt.Fill cooling until the water comes out.Reinstall bolt and top off coolant.

 

[our1962]

I drill a 1/8 inch hole in my TSTAT's and just continue too run the motor with radiator cap off, you'll see the coolant circulating and burping until you just see coolant circulating.

This method has never failed me in getting all the air pockets out and my cars run 180-185 in Florida heat.

 

[63impalass409]

I usually leave the water temp sending unit unscrewed in the intake manifold until I have water coming out of it then run er

 

[Iowa409]

Got 'er.... she was resisting but after a few bubbles she finally gave in, thanks guys.

 

[Skip FIx]

I usually drill the thermostat also.

A Honda Accord I had in the 80s actually had a bleeder on the thermostat housing like a brake bleeder!

 

[427John]

VW's and BMW's had coolant bleeders too, but those are usually only necessary when the fill spout isn't the high spot in the coolant system, air will usually make its way to the high spot after some running.