Question about 1995 Jeep Grand Cherokee
Hi there is One thing you can do to see if the heater core is plugged or not. Take the two hose from the heater core. Remove them from the engine. The hose that has pressure, put that one in a bucket or something to collect the coolant and debris. The other hose, put a garden hose to it and let the water backflush the heater core. You will see the dbris come out of the hose in the bucket. Do this till the water comes out clean. Once thats done, reconnect the hoses and fill your rad again. let the engine warm up so the thermostat opens and allow thw air to escape through the rad. top up radiator as required during this burping procedure. Once all the air is out top up the rad again and put the cap on. Try this and see if the core is plugged. By the sounds of your complaint , it is because you should have even pressure on the hoses and the temperature on those hoses should be similar to the touch. Hope this helps you out
Posted on Jan 16, 2009
Jeeps have a notoriously small radiator. When system is new, they run at what I would consider marginal efficiency. As core passages begin to plug up with mineral deposits etc, it pushes the system "over the edge" and causes overheating. This happens fastest with the iron block 4.0 engines, that tend to rust up internally. You need to remove the radiator and back-flush it to get some of the plugged passages to open up. I use CLR or a similar household lime & rust remover and with the rad out and hose outlets plugged, actually fill the radiator with this stuff and let it sit for a few hours before blowing it out with a garden hose. (you can do the same to the heater core, right in the car.by removing both hoses and filling it without removal.It dosen't hurt to flush out block with a hose while waiting either! I've done this lots of times and cannot believe how much debris comes out of there (sometimes over a cup of hard calcium, not counting dissolved stuff)
If you don't have something bad going on there (ie: head gasket, etc) This should help.
Posted on Jan 16, 2009
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Posted on Jan 02, 2017
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