2000 Jeep XJ Cracked Cylinder Head
Senior Member
Joined: Jan 2017
Posts: 799
Likes: 4
From: usa
Year: 2000
Model: Cherokee
Engine: 6 cylinder
I thought for sure i had the infamous 331 crack.
The coolant reservoir was always low when i checked it.
A coolant pressure test revealed a tiny leak in the radiator. It was small enough where the leaky coolant evaporated on the hot radiator before drooling on the ground. Reservoir always full after a new radiator.
My 331 heads and oil psi were good when i changed the engine out at 290k or was it 300k for other un-related reasons.
The coolant reservoir was always low when i checked it.
A coolant pressure test revealed a tiny leak in the radiator. It was small enough where the leaky coolant evaporated on the hot radiator before drooling on the ground. Reservoir always full after a new radiator.
My 331 heads and oil psi were good when i changed the engine out at 290k or was it 300k for other un-related reasons.
Newbie
Joined: Aug 2016
Posts: 19
Likes: 0
From: Inland Northwest
Year: 2000
Model: Cherokee
Hello all,
I am looking for some advice in regards to my 2000 XJ with 185000 miles on it. When i purchased the jeep it had no signs of a cracked head. After owning it for a few months I noticed the coolant reservoir was low. I topped it off and its low again. Because there were no obvious leaks and after reading about how often the 2000s heads crack I decided to look inside the oil cap and saw a faint green line. I'm assuming this is coolant and that I have a cracked head.
The jeep runs fine, no milky substance under oil cap, the combustion leak test showed no leak, oil pressure fluctuates but after doing some reading it sounds like the XJs are suppose to do that.
Assuming I have a cracked head, i'm looking for some advice on what to do. I have no idea how long its been cracked for. Do I just replace the head and hope the bearings are still in good order? Do I replace the head and the bearings? Do I buy a new motor? I've read the location of the crack will determine if coolant has affected the bearings but how do I determine that?
Any suggestions, tips or comments are appreciated!
I am looking for some advice in regards to my 2000 XJ with 185000 miles on it. When i purchased the jeep it had no signs of a cracked head. After owning it for a few months I noticed the coolant reservoir was low. I topped it off and its low again. Because there were no obvious leaks and after reading about how often the 2000s heads crack I decided to look inside the oil cap and saw a faint green line. I'm assuming this is coolant and that I have a cracked head.
The jeep runs fine, no milky substance under oil cap, the combustion leak test showed no leak, oil pressure fluctuates but after doing some reading it sounds like the XJs are suppose to do that.
Assuming I have a cracked head, i'm looking for some advice on what to do. I have no idea how long its been cracked for. Do I just replace the head and hope the bearings are still in good order? Do I replace the head and the bearings? Do I buy a new motor? I've read the location of the crack will determine if coolant has affected the bearings but how do I determine that?
Any suggestions, tips or comments are appreciated!
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