Question about 2004 Jeep Grand Cherokee

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Radiator on 04 GC SE blow out

My radiator blew apart on the top plastic right by the hose. What may make that happen?

Posted by dgonzo78 on


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Michael Zangari

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Could be a faulty radiator or too much pressure in the system.
You could have a bad head gasket.

Posted on Oct 04, 2008


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Just replaced radiator hose for 2002 BMW X5 4.4 v8 because old one came loose and all fluid leaked out. Refilled radiator with 21/2 gallons of antifreeze. Now when I turn on the car the temp gauge goes all...

Which hose came off? If it was the top radiator hose, is the nipple on the radiator still intact? The failure mode for these plastic radiators is that the top hose nipple crumbles from the inside and blows off.
Did you bleed the cooling system through the bleed screw next to the fill point on the radiator? Normally, when these cars overheat after coolant is changed, it is because there is air in the system. You need to turn on the key and turn the heater all the way up so the heater valve opens, then add coolant to the reservoir until pure water comes out the bleed screw hole. The reservoir will appear to be overfilled, but any excess coolant will push out the first time you drive the car (oops, is EPA listening?)
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