Question about 1998 Jeep Grand Cherokee

1 Answer

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

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,627 Answers

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.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 2000 buick regal gse it has a 3.8 l engine with a supercharger Im trying to drain the radiator to flush it out and add new antifreeze Im having trouble with the pitcock valve any suggestions

Dont bother with the Pep/Pipcock. Simply remove the hose on the radiator near the water pump. Also pull off the thermostat hose and Thermostat (Buy a new one with seal) Flush it with water till clean. (The block and radiator) Those valves can and DO break. Then you'll need a new radiator. After all is said and done. That brass bolt is the air bleeder on the Thermostat neck.

Nov 30, 2016 | 2000 Buick Regal

1 Answer

Head gasket or IM gasket? overheating, think there's antifreeze on spark plug threads. drained flushed bled system. new thermostat rad cap. still overheating.

Somebody been using tap water in their radiator? The vehicle is old enough to have a lot of accumulated rust and crud in the Radiator which, depending on relative water quality and location of water pump could over pressure the system and have it squirting into overflow. If the threads of the plug have antifreeze on them it's coming from the OUTSIDE not the inside.

Apr 15, 2014 | 2005 Buick Rendezvous

1 Answer

Im trying to flush the cooling system on a '97

Not positive about that engine, but the usual method is the heater inlet will come off the cylinder head somewhere and to the firewall, and the heater outlet (the return hose) will be at same place on the firewall and go to the water pump, very close or at the fitting where the lower radiator hose attaches to the water pump inlet.

Jul 21, 2013 | Cars & Trucks

1 Answer

Flush radiator

The easiest way to flush, if radiator is left in the vehicle, is to have the car at normal operating temperature, open the radiator drain, and put a garden hose into the cap opening. Turn it on till as much water enters the radiator as is leaving the drain. Run the engine as you are flushing, and run it till the water runs clean out the drain. Then shut off and refill with a 50-50 mix of water and antifreeze.
If you take the radiator off, you could run the hose into the bottom hose fitting and let it drain out the top hose fitting or the radiator fill neck. A simple back flushing method that may help dislodge and flush out any particles-but the first method should work well enough if your radiator is in good shape and not clogged up with rust and scale.

Apr 29, 2013 | 2003 Buick Century

1 Answer

I have a 2000 nissan xterra my heat dont warm up i change my thermo stat if i get my heater core flush what are my chances of it working what are the major problem with the 2000 nissan xterra i done...

forget all the above items you mentiond,the heater metrick/core should be ok if you put a cooler flush through the system,im looking at the thermo switch mounted on the top of the water system it will have two wires on it and tells the engine when to let hot water through the core,also if its not working the engine will not perform great so try this and forget about new spark plugs/wires/coil pack ,as these are nothing to do with heating.adrian,,,

Dec 31, 2010 | 2000 Nissan Xterra

1 Answer

I got 2006 300c was starting now wont start water got into it was starting now got it towed 2 dealer for atranny flush they said car was pushed n idn so now im stuck on what two do once a while will start...

Flushing the transmission will not solve an ignition problem caused by water.
If enough water gets into the air intake then it will contaminate the fuel system components and intake system. Eventually it will evaporate. It will help to use a fuel additive that contains methanol.

Sep 08, 2010 | 2008 Chrysler 300

1 Answer

My car is overheating. i got water in my transmission, and transmission fluid in my water. is it my radiator? can my transmission cooling lines be backwards? my car is not smoking and no water is comming...

Sounds like the transmission cooler tank with in the radiator has gone bad, the transmission lines can go on either way, does not matter, replace radiator and have cooling system flush and have a transmission flush also done.

Jul 08, 2010 | 2000 Plymouth Neon

1 Answer


A weak water pump, faulty thermostat, and or bad radiator. You can try with the simple and replace the thermostat and flush out the cooling system with radiator flush, just follow the instructions on the radiator flush bottle. Preston has a radiator flush product that works really good on cleaning up any corrosion, causing the restriction of coolant throughout the engine and radiator. If this does not help, then its and good chance that your going to have to replace the water pump.
Thank you for using Fixya and good luck.

Mar 22, 2010 | 1993 Nissan 240SX

2 Answers

Engine Overheating

water pump, thermostat, head gaskets???

Aug 12, 2008 | 1996 Chevrolet S-10 Pickup

Not finding what you are looking for?
1998 Jeep Grand Cherokee Logo

142 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

76109 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides