Burping a 2000 2.5 TJ after draining fluid

BABOOZLE

Caught the Bug
You can loosen the hose clamp for the upper radiator hose at the thermostat to let the air out of the system when it's running. I've used a screwdriver to gently pry the end of the hose to burp it. Or you could drill a small hole in the thermostat which helps the air escape when filling. My 4.0 had a temp sensor at the back of the head you could loosen up.
 
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