Jeep overheated, about 20 times...
Yeah so I never maintained my cooling system and overheated my 01' with the weak head a few dozen times while doing flushes to try and fix it.
So today I got the new OEM style radiator, water pump and fan clutch installed.
Things I learned.
You can never have enough 10MM and 9/16 sockets.
Quick disconnects suck.
Quick disconnects can be replaced by hose clamps.
Don't over tighten bolts in aluminum fan clutches.
No, oil in the antifreeze is NOT good.
Buy a 15 MM socket, trust me, BUY A 15 MM SOCKET!!!
Maintain the cooling system!
Maintain THE Cooling System!
MAINTAIN THE DAMN COOLING SYSTEM!!!
My Jeep runs 10 to 15 degrees cooler with the new parts.
I see a write up on installing a head in my future...
So today I got the new OEM style radiator, water pump and fan clutch installed.
Things I learned.
You can never have enough 10MM and 9/16 sockets.
Quick disconnects suck.
Quick disconnects can be replaced by hose clamps.
Don't over tighten bolts in aluminum fan clutches.
No, oil in the antifreeze is NOT good.

Buy a 15 MM socket, trust me, BUY A 15 MM SOCKET!!!
Maintain the cooling system!
Maintain THE Cooling System!
MAINTAIN THE DAMN COOLING SYSTEM!!!
My Jeep runs 10 to 15 degrees cooler with the new parts.
I see a write up on installing a head in my future...
CF Veteran




Joined: Nov 2010
Posts: 5,841
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Yes, the 0331 cylinder head does not like to be overheated. Your new hobby is to religiously check the coolant level in the reservoir because "the #1 symptom of a cracked 0331 head is unexplained coolant loss".
Good luck!
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