1999 ranger keeps blowing coolant out the reservoir. Shop did pressure test this morning and confired not leaks in the system however said something is causing the pressure to build to much. Any idea as to what I might check? Replaced thermostat yesterday and it didnt help, however it did overheat yesterday morning and my step father had to come get me from side the road. He took and punched a hole in the thermostat filled the the radiator back up so I could make it to his house and replace the thermostat.

SOURCE: 2.3l ranger keeps overheating, been through two radiators already.

Hello Ranger Joe, eight months and two radiators is very uncommon. Question, Have you visually confirmed the leak in the radiators or is the leak near the hose connections? Replacing the radiator, cap, water pump, & the thermostat leaves only two others, the hoses and the engine block/heads. Far fitched will be something or somebody poking holes in the radiator.

SOURCE: 1998 Ford Contour HEATING problem

replace the heat controls in the dash, just og to the junk yard and get a new one, you can actually replace this yourself.

where the unit is, you have to remove all of the botls around it, just feel around for them and unscrew them. this will loosin the panel, pull the panel off, adn you will see there is 4 screws holding the heat controls in, unscrew them, and pull the control out, you will have to unplug a couple of plugs and undo a hard wire form the top, it is frustrating, but you have to hold the hard wire and turn the control tword the pasenger side of the car to pop it out, it is possible there is a clip holding itdown, if so just push on the bottom of the clip and it will pop out. and do the same to put the new one in.

SOURCE: Have a 2003 ford f150 crew cab truck will start to

Problem is most likely the water pump.Have seen several of these doing this on the 5.4L. Impeller fins were damaged on the ones that I have seen.

SOURCE: Radiator blockage?

I believe you have a head gasket blown or a cracked head. When you start it up COLD with the cap off, it would push water out immediately. Fill it with plain water and try this. It might not be a bad idea to perform a pressure test too. Also check for antifreeze in the oil. It will get milky looking and might even be over full. If this happens after warm-up, you may just have a plugged radiator. Have it professionally cleaned. The water pump vanes could also possibly be corroded off and it's not effectively displacing coolant. Hope this helps.

SOURCE: heater blows cold air. I have replaced thermostat,

Not an expert by any means, but i know my ranger.. I had a small leak at the top of my radiator that still cooled the engine but didnt have enough pressure to get to the heater. The heater hoses travel up over the engine and just were not gettin anything to my heater core. That or make sure the heater control valve is operating.