Engine Cooling problem
2001 Jeep Cherokee 6 cyl Four Wheel Drive Automatic 9770 miles
2 weeks ago I bought a 2001 Jeep Grand Cherokee with the 4.0l engine and 4WD. I drove it about 150-200 miles and then noticed it overheating down the highway, I was a couple miles from my house so backed off and went home nice and slow and it cooled down some, it got up to about 250 and then backed down to 240 til I got home. I let it cool down, topped it off with water and then let it idle in the driveway. It climbed again. I drove it around a little and it seemed to stabilize around 245 while driving, drove it about 15-20 miles. It was bubbling back into the reservoir. I did some research and found some stuff about the fan relay switch and fan relay. I checked that out and found the relay had been changed and noticed the fan kicked on at around 200. I assumed it wasnt that. I changed the thermostat, changed the hoses, flushed the system and put a safety radiator cap on it. It was fine while idling, so I decided to take it for a test drive. Within a mile it shot up to 245 so I turned it around and took it home. As I was pulling in the driveway, the temp went to 250 and then I heard a pop and the radiator blew a seam right below the upper cooling hose. I changed out the radiator, real carefully, and then refilled the system and it idles around 210, and I changed the radiator cap to a regular one, but took it for a ride and it rose in temp again. Around 245. Now not sure what to do, is it the water pump? Its not leaking and it isnt making a lot of noise. The truck isnt putting out a lot of smoke, no water in the oil, isnt losing coolant, no wierd smells inside the cab or in the tailpipe, and is idling smooth and runs smooth when it runs. I thought about getting a pressure test at a garage, but it overheats before I can get it to the nearest one. Any advice?
have the same problem?
Wednesday, March 10th, 2010 AT 4:37 PM