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post #1 of 5 Old 08-04-2003, 04:43 PM Thread Starter
tetatdo
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cooling question....

Hi. I have a 94 ZJ 4.0 and I recently went through and changed all the hoses. I drained the radiator, replaced all four houses and the thermostat and put it all back together. I even put in a 180 Deg thermostat.... the car seems to run cooler according to the guages but Im a little bit skeptical.... Every time I feel the upper radiator hose, it is not under pressure.. i can squeeze it all the way till my fingers touch. I can even do this when its hot and its still not under pressure. The lower radiator hose seems to only be under a slight more amount of pressure, but even that isn't much... Did i do something wrong? I seem to remember with the old hoses and thermostat that there was more pressure in the system... Should I not drive around the car? Is the guage lying to me? is there a coolant blockage somewhere? or air in the system? I think i burped the radiator right, I just kept filling and squeezing the upper hose and letting air out.. I don't want to ruin the car.. I hope its running okay.

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post #2 of 5 Old 08-04-2003, 05:07 PM
Texas ZJ1
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Is the resevoir for the fluid full? Add more fluid and see what happens.


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post #3 of 5 Old 08-04-2003, 05:17 PM Thread Starter
tetatdo
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yeah, the reservoir is full

mind you, the car doesn't run hot.. Which is why its baffling me.. I mean the temp guage says its running kinda cool. but the hoses aren't under pressure. I get the feeling something's wrong
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post #4 of 5 Old 08-04-2003, 05:37 PM
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That's weird. When I replaced all the rad fluid, I just kept adding until the rad was full. Then, I squeezed the top hose and it filled allowing me to pour more into the rad.

Hunter

04 4.7 HO, limited

08 Z71 Suburban, front leveling kit with rear spacers. 285/65 18s Nitto TerraGrappler G2s

94 5.9 Laredo 6.5 RE lift with 35 Maxxis Bighorns
and 33 Bridgestone Duelers
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post #5 of 5 Old 08-04-2003, 06:00 PM Thread Starter
tetatdo
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yeah I was doing the exact same thing. When i squeezed the top hose, air would bubble out... I did it till i got no more air out of the rad and i capped it..

The upper hose gets a little bit of pressure, and it certainly gets hot when the car is running, but its just not under pressure
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