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Old 12-31-2012, 10:50 PM   #1
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Installing new radiator, new water pump necesssary?

I have a 2001 Sahara 4.0 with 68,000 miles that's going to need a new radiator as soon as the weather warms a little where I can work outside. From all the expert experience on this Forum, would it be advisable to change the water pump at this time even though there's no present signs of any leaks (other than the radiator)? I'll definitely be changing the thermostat but just wondered if with this low mileage would it be worth the expense of a new pump?

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Old 12-31-2012, 10:53 PM   #2
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If it's not leaking and it isn't loose I'd leave it. You don't touch the WP when replacing the radiator anyhow.

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Old 12-31-2012, 11:44 PM   #3
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I replaced my radiator earlier this year and although my water pump was still good I replaced it anyway. If you don't replace it while the radiator is out and it goes out you will have to drain all the antifreeze out and remove the radiator again. It's just easier to do it while it's out and it as good for my piece of mind. Just make sure if you do replace it use an OEM water pump. Heres where I bought mine...http://www.ebay.com/itm/00-06-JEEP-W...sories&vxp=mtr
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Old 12-31-2012, 11:46 PM   #4
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If you don't replace it while the radiator is out and it goes out you will have to drain all the antifreeze out and remove the radiator again.

The requirement to remove the radiator to replace a water pump is highly imaginary.
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Old 12-31-2012, 11:52 PM   #5
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I know it's not required to remove the radiator to replace the water pump but he has to replace the radiator anyway. It would just be easier to do while the radiator is already out.
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Old 01-01-2013, 04:01 AM   #6
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Change only the Radiator and not the water pump or thermostatic, unless they are giving you a reason to change them. Your just throwing your money away!
I would install new upper and lower radiator hoses.
My friend has a 4.0 with about a 169000 miles on it and the complete cooling system is original except for the coolant!
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Old 01-01-2013, 07:42 AM   #7
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That's really unneccessary and can open up chances for possible leak from a bad install or bad 'new' pump.
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Old 01-01-2013, 07:53 AM   #8
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If it is not leaking and working perfectly then why replace it? I understand the need to do it while you are there but why waste the money?? It's not all that tough to pull the radiator so replacement later on is not all that difficult. I wouldn't touch the thermostat either if it is working good also. Getting the housing to seal back up can sometimes be a challenge all by itself... Took me 3 tries and finally ended up using a thin coat of high temp RTV on both sides of the gasket.
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Old 01-01-2013, 07:54 AM   #9
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Originally Posted by 03Ruth
I know it's not required to remove the radiator to replace the water pump but he has to replace the radiator anyway. It would just be easier to do while the radiator is already out.
No, it would be " easier" to just replace whats wrong, The radiator. If it aint broke dont fix it.
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Old 01-01-2013, 08:29 AM   #10
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It's not all that tough to pull the radiator so replacement later on is not all that difficult.
Not only is it "not all that tough," it's completely and totally unnecessary.

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...just wondered if with this low mileage would it be worth the expense of a new pump?
With the advent of improved coolants, water pump seals are lasting longer than they did in years past. I would not recommend a preemptive water pump replacement at under 100,000 miles. Consider that water pump failures are seldom catastrophic; they usually provide plenty of advance warning.
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Old 01-01-2013, 09:09 AM   #11
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One question would be why is the old radiator failing this soon? Did the Jeep get overheated for some reason? A physical assault happened to it? (Tree limb jabbed it) Or was it just poor manufacturing?
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Old 01-01-2013, 09:12 AM   #12
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I wouldn't worry about it.
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Old 01-01-2013, 09:19 AM   #13
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One question would be why is the old radiator failing this soon? Did the Jeep get overheated for some reason? A physical assault happened to it? (Tree limb jabbed it) Or was it just poor manufacturing?
It's 12 years old, and the factory radiators are notorious for failing. In the last 5 years I'll bet I've replaced 5 or 6 TJ radiators, and only one water pump that I can recall.
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Old 01-01-2013, 09:37 AM   #14
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It's 12 years old, and the factory radiators are notorious for failing. In the last 5 years I'll bet I've replaced 5 or 6 TJ radiators, and only one water pump that I can recall.
Ahh! So it's poor manufacturing! My Jeep is the first Chrysler product I've had, and even though its a fun rig, I've found out they don't hold up too well. A lot of agitating little and big things. It does what I need it to do, so I put up with it. I have always got at least 20-30 years out of radiators on my other vehicles. Just turned in a truck with a quarter of a million miles on it, never turned a wrench on it other than changing the oil every 5k, tires and brakes. I don't think my new one is going to do so well (government motors).
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Old 01-01-2013, 09:37 AM   #15
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One question would be why is the old radiator failing this soon?
A TJ radiator that survives for 12 years is probably in the 95th percentile. I just replaced an original radiator in a 25 year old, 175k miles Cherokee; it was built like a tank compared to a TJ radiator. All metal; brass tanks and copper core.

When it comes to durability, the OE TJ radiator doesn't win any awards.
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Old 01-01-2013, 09:46 AM   #16
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Ahh! So it's poor manufacturing!
Poor design. Non-reinforced plastic tanks, in particular.
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Old 01-01-2013, 04:22 PM   #17
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Do what you need if money is tight. If money is not a problem I would with out a doubt change out all things related while the radiator is out. Water pump, thermostat, upper and lower rad hoses and heater hoses use new hose clamps and a new fan clutch. New belt ,idler and tensioner. With the age of your cooling system any of these things are suspect and could expire any time.

Any one of them have the possibility of ruining your day and possibly your engine if someone were to drive it without knowing it was over heating.Looking at my wife while saying that. One tow bill will cover the cost of most of those other items and the piece of mind knowing that your entire cooling system has been replaced is priceless.Sure as shit if you dont replace these things you will be kicking yourself in the ass later on.
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Old 01-01-2013, 05:35 PM   #18
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Why would you spend money on parts that have not failed?
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Old 01-01-2013, 08:24 PM   #19
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Some people call it preventative maintenance .The idea behind preventative is to prevent a untimely failure. Do it right when you have it apart and your odds of walking or ruining an engine go down a lot. Some may see it as a waste I dont if you have the money. Im 42 and I dont like walking and I dont like getting those phone calls from the wife or in this case my son as its his TJ and he is no were near as mechanically inclined as I was at his age. He does change his own oil and he does help me do everything but he is just not there yet.
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Old 01-01-2013, 08:38 PM   #20
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I dont see that as preventive maintenence, i see it as wasting money on parts that could easily last a long time. Hell while hes at it he should yard the valve train and camshaft out because you never know when it could fail.
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Old 01-01-2013, 11:33 PM   #21
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I think your missing the point. They dont cost much and are easy to do while your doing the radiator .Its much easier to clean the water pump cavity and seal face on the block with the rad out.If the fan clutch or water pump fails it can destroy the new radiator.And the biggest issue its a year known to have heads that will crack if it gets hot.Cheap insurance for a little piece of mind.
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Old 01-02-2013, 01:13 AM   #22
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I think your missing the point. They dont cost much and are easy to do while your doing the radiator .Its much easier to clean the water pump cavity and seal face on the block with the rad out.If the fan clutch or water pump fails it can destroy the new radiator.And the biggest issue its a year known to have heads that will crack if it gets hot.Cheap insurance for a little piece of mind.
That was my point exactly. I did everything related to the coolant system because after 120,000 miles they have all seen the same amount of wear and tear. Did it all need replaced because the radiator was bad? No, but now I have the peace of mind of not having to worry about any of the other cooling components going out anytime soon.
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Old 01-02-2013, 03:02 AM   #23
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Preventative maintenance is changing water hoses, coolant, belts, oils, filters, tune up, brakes, tires and battery.
Changing out hard parts that have not failed, or may never fail is just plain and simply a waste of money and time!!!!!!!!!!!
For those of you that want piece of mind, then why don't you just trade up every year a buy a new Jeep so that you really will have piece of mind?
It's your money so spend it any way that you want, but I will save mine for a rainy day and there will be plenty of them in this weak economy of ours.
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Old 01-03-2013, 01:46 AM   #24
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Most people dont want any failures there for they try to error on the cautious side and replace wear items when convenient.Most would consider a water pump a wear item and a convenient time would be while putting in a new radiator.

There are a few pictures on here of pumps with impellers that look like they were dipped in acid.What does yours look like ? Bet you dont know.
We are talking about a $100 water pump .Dont know about you but my time is worth money and knowing I now most likely will have another 100k miles that my water pump and shiny new radiator are not going to have to be messed with is money saved.

There is cheap and there is poor. If your too poor to buy it then you have to do what you have to do.Ive been there done that.
If your too cheap to buy it then you will get what you deserve sooner or later. Thats why you never buy a used car that was owned by a cheap ass . You get to fix all the things they thought didn't need done because it was a waste of money.

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Old 01-07-2013, 12:40 PM   #25
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Appreciate all the excellent advice. As far as the radiator needing replacing, it has been seeping around the crimps of the crappy OEM top cheap plastic tank for a couple of years now and I know sooner or later (and probably while I'm out in the boones some where) it will give out completely. I haven't crawled under the front end and examined the bottom tank real close so it may be seeping also. There's usually a small wet place on the concrete about the size of a saucer when it sets for a day or so and I only have to add a pint to the overflow tank every few months.
I've never had any problems with overheating even crawling around the mountain Jeep trails for several hours in 4X4L doing maybe 3 MPH.
The money is no problem going for a new pump knowing it'll be much easier with the radiator out, but like everyone else I don't like throwing good money down the drain.

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