Replace freeze plug

SOURCE: water pump

Fill the radiator completely with coolant mixture. Let the engine warm up 10 to 15 mins. Is the upper radiator hose warm? If yes, then the water pump and thermostat are good. If all this works, then the leak is somewhere else. Hope this helps.

SOURCE: Where are the spark plugs located in a 2005 Chrysler Pacifica?

Jay from Ma,
You have it backwards the rear three are accessable with the front three being under the intake. To remove the intake simply remove throttle body and aproxamently 15 other bolts.

SOURCE: my chrysler pacifica is leaking anti freeze on the

First find where the leak is coming from. Check the bottom of the radiator first for white corrosion. If the leak puddles in the fron and you see white corrosion on teh bottom (fins) of the radiator, chances are you just need to replace it.

SOURCE: i put in anti freeze in, it leaks out..? the van

check where the leak come from, could be the receivior overfill, a trransm. cooling line in radiator, or an engine block seal worn. sammyc47.

SOURCE: 2005 Chrysler pacifica 3.5 v6

sc1232ip, I think that this is definitely a head gasket problem. When the coolant boils out of the everflow bottle it is because combustion gases are getting by the gasket and heating the coolant faster than the radiator can cool it down and this is the easiet place for it to escape. Also the code po300 for a Chrysler is for a misfire detected. One of your cylinders are getting oil or coolant into them causing this. You didn't mention what color your exhaust fumes were. Are they white (coolant) and have a sweet odor to them or do they have a blue tint to them (oil). Another possibility is a crack cylinder head. Good luck with this.