Hey fellas, I have an 89 XJ, 4.0 with 204k and the closed cooling system. I've recently put in a new water pump, flushed/filled the radiator, tried to burp the system by parking downhill, and put in a new 195* thermostat.
Despite all this, I can drive my jeep around in the 90* weather for about an hour, and then my temperature starts to creep up to the red until I let it cool off for about 10 minutes, giving me another 10 minutes of drive time before I have to stop again.
I thought that the new thermostat was an improvement, you can watch the temp gauge go to around 210, then drop to 180 over and over, until it doesn't drop anymore (after about 15 miles) and the temp stays at about 205 for a bit, until it just starts to rise up to infinity.
I'm thinking of going ahead and converting to the open system via an overflow bottle , filler neck, and new heater valve, like on Madxj.com, but I'm worried that it's not going to make a difference.
My radiator is about 80k old, and it's been flushed a few times recently, so I really really don't want to buy a new one, and am hoping that that's not the problem.
So what I'm asking you fellas is, what do you think the problem is? Neither I nor my dad have really seen anything like this so we're stumped. Fan clutch is a maybe, but how can I tell if it's working or not?
Despite all this, I can drive my jeep around in the 90* weather for about an hour, and then my temperature starts to creep up to the red until I let it cool off for about 10 minutes, giving me another 10 minutes of drive time before I have to stop again.
I thought that the new thermostat was an improvement, you can watch the temp gauge go to around 210, then drop to 180 over and over, until it doesn't drop anymore (after about 15 miles) and the temp stays at about 205 for a bit, until it just starts to rise up to infinity.
I'm thinking of going ahead and converting to the open system via an overflow bottle , filler neck, and new heater valve, like on Madxj.com, but I'm worried that it's not going to make a difference.
My radiator is about 80k old, and it's been flushed a few times recently, so I really really don't want to buy a new one, and am hoping that that's not the problem.
So what I'm asking you fellas is, what do you think the problem is? Neither I nor my dad have really seen anything like this so we're stumped. Fan clutch is a maybe, but how can I tell if it's working or not?