Chrysler Repair: 99 LHS: Overheating, diameter hose, head gasket

Question
Ok my 99 LHS 3.5L keeps running hot. I have replaced the water pump, repaired or replaced all types of hoses, and the thermostat. It runs hot while sitting only sometimes right now(haven't taken it on a road test yet). Both fans are kicking on and it doesn't boil over or anything. When I shut the car off it cools down fairly quick. I don't know if its air in the system or what. I don't have any coolant in my oil, so I don't think its a head gasket issue.

Answer
Hi Marvin,
I would want to be certain that the cooling system has been filled properly as it may have air trapped inside of it that impedes the flow of coolant. There is a coolant bleed valve on the lower intake manifold of the engine; put a 1/4 inch diameter hose that is 4 feet long on the nipple and route the hose forward and out to a can to collect any coolant discharge, in front of the vehicle (you don't want to let coolant get on the drive belts, thus the hose). You then open the bleed valve. Then you pinch close a different hose, the one that connects the two sides of the pressure bottle where fluid is added to the system. Then you add coolant in a small stream to the filler opening (so as to allow air to escape while you are pouring (or use a special funnel that is sectioned to be sure that air can escape, part no. 8195 Miller tool). You keep adding fluid to the bottle until fluid comes in a steady flow out the 4' hose. Then you close the bleeder valve. Then you keep adding fluid to the bottle until it is full on the section of the bottle that is in-board. Then you put the cap on the bottle and unpinch the hose that was previously pinched. Check that you only have coolant in the smaller in-board side of the filler bottle. If necessary drain the larger out-board side of the filler bottle by disconnecting the connecting hose and drain it from that larger side.
If that is done properly I believe you will have heat and the engine will not overheat. This is not 'rocket science' but whoever is working on the vehicle needs to know how to properly refill the system.
Roland