I have 2000 ford ranger v6 3.0 I replaced the water pump ten months ago and all of a sudden it's running hot it only runs hot when I stop for a second at a red light or stop sign. I changed the radiator today but still is running hot. The top radiato hose going to the thermostat housing is building a lot of pressure and the water is bubbling in the reservoir what could be wrong? And I took the thermostat out last week
2000 Ford Ranger Water Pump
You waited too long, over heated the engine, and now have leaking head gaskets. If water is boiling in reservoir, that is DEFINITELY the problem. Take heart, though. Many times, all you need do is replace the head bolts and re-torque them to specifications. This will usualy un-warp the heads and restore good gasket seals on the Ford 3.0 engine. Compression is forcing air into the coolant. It's that simple. Untill your head get resealed, you will contiue to have boiling and overheating. GOOD LUCK!!
You're looking for an answer that may be hard to find. Have to assume the water pump and radiator are good. But there's a lot more to the cooling system. You could have one or more issues. For one, we don't know how well the water pump is spinning or if you changed the pulley so it's spinning slower. You have coolant channels in the block that go through the head gasket into the head. In a 12-year-old car, these channels could be partially blocked with crud and sludge. Stop buying parts and take your car to a good radiator shop. Possibly all you need is a good chemical flush to get rid of the sludge. For starters, turn on the heater which might keep the temperature in the operating range, but get some help from a radiator shop. ... Good luck!!
Check the 20 amp fuse under the hood that sends power to the relay. Also I have a 94 ranger and when I put the fuel pump in a few months back it blew that fuse.It blew because the pump was stuck.I had to take it out and wired to the battery 12 volt to get it to start and then reinstalled.Anyway check that fuse..
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