1984-2001 Jeep Cherokee XJ Reservoir Tanks

Keeping the XJ coolant system honest is the job of 1984-2001 Jeep Cherokee XJ Reservoir Tanks — the overflow and expansion tanks that return fluid to the system when the engine cools rather than letting it escape — a collapsed or cracked reservoir lets coolant boil out rather than returning to the system when the engine cools down, which means the system gradually loses fluid on every drive until the low coolant warning shows up somewhere it shouldn't. Replacing a failing reservoir before that cycle starts is the cheap fix that prevents the expensive one.

 

Aftermarket aluminum reservoir tanks on the XJ replace the factory plastic units that crack at the seams over time, particularly on trucks that have run hot repeatedly or seen significant temperature variation between seasons. An upgraded reservoir with a higher pressure rating also gives the cooling system more headroom on a modified XJ running hotter than stock, which is worth considering alongside any engine performance work that increases operating temperatures.

 

Keeping the XJ cooling system intact and functioning properly is what 1984-2001 Jeep Cherokee XJ Reservoir Tanks handle. The full XJ engine performance category is at 1984-2001 Jeep XJ Cherokee Engine Performance Parts, engine dress-up options for owners also tidying the engine bay are at 1984-2001 Jeep XJ Cherokee Engine Dressup, and supercharger kit options are at 1984-2001 Jeep Cherokee XJ Supercharger Kits.