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Unread 04-05-2014, 12:12 AM   #1
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Location: waynesville, North Carolina
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01 wj radiator coolant system

I have an 01 grand Cherokee at 161000 miles 4 time all wheel drive. I recently noticed there was a little crack at the top of the radiator. I was keeping water/coolant in the reservoir to make up for the small loss until I could afford to get a new radiator. but a couple days ago I was driving and I noticed it was overheating so I opened the hood and noticed that the reservoir had exactly as much in it as I put in it the night before which was at the full line. I drove it directly home after it cooled down (2 miles). I am wondering if i should go ahead and order a new water pump for when I change the radiator or if that is common with the radiator. I also found that there is a much larger crack on the bottom that I wasn't aware of. water pump? lower intake gasket? thermo? the coolant did not smell of gas or oil either. any assistance will be much appreciated

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Unread 04-06-2014, 07:12 PM   #2
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1995 YJ Wrangler 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,136
If your rad cap failed it may have allowed too much pressure to build up in your cooling system and that cracked the rad. Now that you have no pressure in the cooling system it will overheat even of it is full because doesn't have enough pressure in the system. I would replace the rad, cap and coolant.

If you do not know when the water pump or thermostat was changed I personally would add them to the list of parts to replace. Then you might as well look at your belts and hoses also.

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