HarleyRob

need to replace radiator and need advice...

the radiator looks as though it has two sections (99 jeep cherokee sport). regular radiator closest to engine then thin smaller radiator in front. is this considered one piece? if i order replacement will both come or only main section? and if old radiator obviously has rust issues, do i need to do any more than replace? is rust in engine? do i need to flush? thanks

HarleyRob

and btw, where is the best place to shop for a new radiator?

Basshark7

the smaller radiator is your transmission fluid cooler. If you need to replace both of them you will have to order both pieces separately. I would at the very least replace all your engine coolant. There is a stopcock on the bottom of the radiator (mine is seized so I have to disconnect the lower radiator hose and stuff it in a bucket as quickly as I can). As far as a replacement goes I am not knowledgeable in that area. I would think you could order one at your local parts store.

HarleyRob

how do u know if u need to replace both? prob shud if I'm replacing main.

djb383

The front piece that looks like a radiator is the A/C condensor......totally separate from and nothing to do with the radiator. A new radiator for a vehicle with a auto tranny will have the tranny cooler inside the new rad.

Bustedback

There is an auxiliary transmission cooler and the A/C condenser in front of the radiator. You only need the radiator. I suggest having a shop do it for you if you have never done any kind of mechanical work. If you do plan on doing it yourself you can find radiators at any local parts store for around $150. Shop around.

EZEARL

The thin one in the front is your a/c condensor. Your trans cooler and engine cooler are one piece. Sounds as if you need to replace the rest of the cooling system.

http://www.autozone.com/autozone/par...266534_0_13752

HarleyRob

ok. my wife hit a deer a few months back and pushed grill ever so slightly into front part bent it slightly so may replace as well. jeep as 155k on it

HarleyRob

when replacing radiator, do u have to bleed system? or jus hook up all hoses and go? and how much antifreeze does it hold?

Basshark7

Whoops suppose I need to double check and see if your XJ came with the Up Country or the factory towing package. Anyway try this link (http://www.jeep4x4center.com/knowled...ex.htm#service)
7-2 has a depiction of the auxiliary transmission fluid cooler just scroll down a page. I always forget about the AC Condenser.

Edit: All the information you are asking for can be found in the above link just change the box that says cooling system to whichever category you need

Basshark7

Check your transmission fluid. If I remember the dipstick is in the rear of the engine compartment and is designated by a gear symbol wipe it on a white paper towel or other white flexible surface if it looks good then you don't need to replace the fluid (unless age is a factor). If the auxiliary trans cooler was damaged in aforementioned altercation with deer then I would replace it as it is likely depriving itself and the radiator of airflow. If you don't tow or wheel much you could even get rid of it.

Pelican

Why does everyone think the OP has a separate transmission fluid cooler? Why are we talking about changing the trans fluid?

Firstly, why are you swapping out the radiator? Are you having overheating problems?

What is history of cooling system maintenance? It usually makes sense to replace other components when going to the trouble to take everything apart.

The '99 cooling system is self burping but you need to fill it properly with some patience and then monitor it for a couple days.

You can get a stock type radiator at any parts store for around $100 or so. Whether you need or want an upgrade is up to you. How do you use your XJ? DD, off road etc.

Pelican

And you always flush. Too what extent and with what is determined by the condition of the cooling system.

HarleyRob

I have had history of runing hot. Had history of rust in radiator. Had it flushed by local mechanic etc. started running hot lately and just thought it wouldn't hurt to have new radiator with 155k miles. My jeep is for daily commute no towing.

Pelican

I flush every 2 to 3 years with Prestone flush that you leave in the system for several days/hours/miles "whether my system needs it or not." Others don't see the need for the extended flush but it sounds like it wouldn't hurt in your case.

Unless you know otherwise, your problem could be pretty much any component or combination in the system. Changing out the radiator and cap, water pump, mechanical fan clutch and thermostat can be done for ~$200 or so and you won't have to speculate or go through replacing coolant several times if problem turns out to be something other than the rad.

Assume e-fan is working?

Just some thoughts, let us know any other ideas you are having about the process.

Also a good time to check and swap belt if necessary.