Burping 2018 3.6L no radiator cap

[Big Juan]

Hello, I had to replace my thermostat so went ahead and did a flush.
I have back flushed the heater core by removing supply and return hoses. I also flushed the radiator and block through the open t-stat housing.
A couple of question;

1) How do you “burp” the system since there is no radiator cap?

2)What is the torque for the thermostat, plastic housing?

Thanks for your help.

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[roaniecowpony]

1) The quick and arguably best way is to use a vacuum fill device. I've done it by filling and running/driving, check add, repeat.

2) 10 n-m or 89 inch pounds.

 

[Big Juan]

Hello, thanks for the reply, I will have to look into the vacuum fill device.
Not familiar with it.
thanks for the torque.

 

[DavidES1]

Jack up the front end and fill. Gravity will burp out the air.

 

[Big Juan]

Thanks, I’ll give that a try as well.

 

[58Willys]

I have a Mastercool 43012 vacuum and fill kit, works well.

 

[mwilk012]

It’s fully unnecessary on the JL, just fill it up.

 

[Big Juan]

It’s fully unnecessary on the JL, just fill it up.

Hello, so why is that with the JLs?
I looked into renting the vacuum, no stores had one.
I flushed it 3 times and it did not seem to have an issue with air blockage when I refilled it.
But I could never really get all the used fluid out, just what came out of the radiator, heater core and reservoir, I even blew through the core intake and thermostat.
the most I got out was about 5 quarts measured on the last drain out after flushing. Since I could not get all the used fluid out I dumped 2 gallons of distilled water through the heater core and t-stat housing to make sure what was left in the block was clean water.
Good thing the coolant I bought was concentrated. I put in about 6 quarts of coolant, maybe not quite 50-50 but i think its going to be ok.

 

[mwilk012]

The JL uses a pressurized coolant reservoir with a permanent air bleed hose. Coolant constantly flows into and through the reservoir. It is positioned at the highest point and does a very good job.

 

[Big Juan]

Ya I saw it pumping coolant through. All is good.
Now onto installing some skids I got over the Labor Day sales

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