Question about 1998 Jeep Grand Cherokee

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Im trying to flush out the water system what do i have to do first?

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First thing you should do is pick up a can of radiator flush and add it to the overflow tank.Drive the jeep with this cleaner in it for a couple of days and then you need to let it completely cool down,remove the rad cap and drain the rad,catching the antifreeze in a pan and dispose of it at a local garage that is authorised to dispose or recycle it.Next step is to remove a heater hose from where they go through the firewall and then remove the thermostat from the thermostat housing and the put the housing back in place.Run a garden hose into the smaller hose of the water pump to flush the engine and heater core,run water into the top of the rad to clean it out,water into the thermostat housing to flush the engine block.

Posted on Sep 16, 2010

  • Secret Squirrel
    Secret Squirrel Feb 01, 2014

    I don't believe any of the backflushing kits instruct the removal of thermostat. It is left in to block the water and force it to go back through heater core in the opposite direction of the normal direction thus creating the backflush.

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