MOROSO Tank Upgrade


If you are tired of that cheesy plastic pressure bottle under the hood of your XJ Cherokee, we have the solution for you.

There are two problems with the XJís stock arrangement:

I bought a new tank for mine from the dealer for almost $100 and it was leaking within three months.

The hart of the BUILDYOUR4X4 XJ cooling upgrade is a MOROSO pressure tank. With itís all aluminum welded construction and its standard radiator cap top opening, this kit solves both of the problems, plus it looks sweet. The reason I like this setup so much though is that it solves the problems of the original system without changing the basic configuration of the cooling system that your jeep was designed to have.I have used my system for almost two years now and I havenít had any problems with it at all. It just plane does what the original system does only it never leaks and it does not lose coolant over time from evaporation or overflow.


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Kit Contents

Bottle Kit

  1. Bottle
  2. Teflon tape
  3. Top Fitting
  4. Bottom Fitting
  5. Connector fitting
  6. 4 hose clamps
  7. Hose
  8. 16 psi Radiator Cap

Bracket Kit

  1. Bracket
  2. 4 self tapping screws
  3. 2 bolts 1/4-20 3/4
  4. 2 split rings
  5. 2 nuts

Install Instructions

Removing the old tank

  1. Disconnect the hose that comes off the side of the tank by loosening the hose clamp and sliding it off the plastic nipple.

  2. Get some kind of a can ready to catch coolant in. (CAUTION some coolant is toxic and also has a sweet taste that cats and other animals like)

  3. Tip the old tank so that as much coolant as possible empties out of the tank and into the can.

  4. Disconnect the hose that comes out the bottom of the tank the same way as the first one. At this point some coolant will flow out of the hose and you will want to catch it in your can.

Installing the bracket

  1. Paint the bracket as desired. We recommend starting with a zinc rich primer.

  2. Position the bracket on the ledge on the firewall so the gap between the edge of the bracket and the upslope of the firewall is even and the brackets tab is seated against the firewall.

  3. Using the bracket as a template, mark the locations of each of the 4 holes using a felt tip marker.

  4. Center punch the center of the pen marks. (If you don't have a center punch you could skip this step but you will need to be extra careful in the next step not to let the drill wander.)

  5. Drill each center mark with a small (1/8" or smaller) bit.

  6. Using a drill start each of the 4 self-tapping screws. As soon as the threads catch stop.

  7. Finish tightening each screw by hand. They do not need to be very tight. Tighten them only enough to pull the bracket down snug.

Installing the new tank

  1. Wrap the two pipe threads on the two fitting with 3 wraps of Teflon Plumbers tape in the counter clockwise direction looking at the fitting from the pipe thread end.
    When you are finished the end of the tape should lie so that when you screw it in it will get slicked down rather than bunched up. If it dose not take it off and wrap it the other direction.

  2. Thread the fittings in the holes good and firm.

  3. Slide the provided length of hose onto the barbed end of the top fitting and secure with the provided hose clamp.

  4. Slide the original bottom hose onto the bottom fitting and secure with the provided hose clamp.

  5. Hold the end of the provided top hose up to the end of the original top hose and determine if the provide hose needs to be trimmed. If it is longer than necessary mark it and trim it with a sharp knife like an Exacto.

  6. Insert the connector fitting about half way into the hose and secure it with a provide hose clamp.

  7. Insert the other end of the connector fitting into the other hose and secure with the last hose clamp.

  8. Bolt the bottle to the bracket using the ľ-20 bolts split washers and nuts