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Posted

i guess to be more specific, i changed the lower radiator hose. then when i filled the overflow bottle and turned on the engine the antifreeze never drained out of the bottle. tried pouring some in the upper radiator hose with no results.

Posted

It seems some people have a problem with air pockets when filling the closed cooling system. A seemingly good way to burp the system is to park the truck nose down (or jack up the rear) and remove the coolant temp sensor until coolant comes out. The sensor is located in the head next to the valve cover, driver side near the firewall. It has one single wire coming from it.

 

Warning: some people have broken the sensor trying to remove it when it was rust welded in place.

 

I myself remove the thermostat housing end of the upper radiator hose and fill the system through the hose. Never had a problem doing it that way.

Posted

remove the small hose that goes to the water pump and fill it there, it will get rid of the problems with air pockets by putting the coolant on the backside of the thermostat

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