How do I change the coolant in my 1990 Jeep?

cgolda
0

Asked by cgolda Dec 23, 2012 at 03:47 PM about the 1990 Jeep Cherokee

Question type: Maintenance & Repair

Where is the collant drain?

3 Answers

joejoes
115

YOU'VE GOTTA PULL THE LOWER HOSE OFF YOUR RADIATOR WHEN EMPTY COOLANT GOES IN RESERVOIR

tenspeed
50,905

The drain petcocks fill with crud anyways. Replace the wire clamp with a new stainless hose clamp. Flush it out with water a couple of times. When ready to refill, pour in half the coolant volume with straight anti freeze. Fill the rest of the way with distilled water. That way, any water remaining in the block will be added to the 50/50 mix.

NVSmith
85

Most people forget to open the coolant drain on the block when changing ar flushing their cooling systems. Unfortunately the drain plug on the 4.0 is cleverly hidden under the manifols and can be a bugger to spot. Also, be careful when the engine is hot. Before changing the coolant are you going to run some cooling system cleaner before draining, flushing and refilling the system? As tenspeed intimated, a lot of crud builds up in the system.

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