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Coolant issue!

jeepfreak32

NAXJA Forum User
I got an 87 XJ 4.0 and the strangest thing happened. After replacing battery and power steering pump, the truck was at idle for about ten minutes. During Idle, I noticed a hissing sound and saw that the coolant bottle was about to explode!! It was hissing steam and shooting fluid from the bottle. The bottle has hair line cracks now. I killed the truck and the bottle was still being pressurized?!! I have checked the thermostat and it is good. The engine gauges show no signs of overheating as well??!! Has anyone come across this problem?
 
87 = closed system and must hold 16psi

Replace your coolant bottle if it is cracked (19bucks from Quadratech)

this should solve your problem.
 
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