Common Problems with 1999 Cherokee Sport? - JeepForum.com
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post #1 of 29 Old 02-02-2006, 07:00 PM Thread Starter
blakely03
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Common Problems with 1999 Cherokee Sport?

Looks like a great forum!

I am looking at buying a 1999 Jeep Cherokee Sport with the 4.0L. My question is: What are some common problems/specific things I should be looking for with this model year?

The jeep runs and drives good, no abnormal engine noises. One thing that i found was some sediment/mud when I reached my finger down in the radiator. I also noticed that the coolant looked fairly dirty. I was just wondering if there was anything in the cooling system that is common to leak (ie. head gasket, cracked head/block, radiator, heater core)...thus the sediment being a block sealer.

Thanks for any help

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post #2 of 29 Old 02-02-2006, 07:22 PM
johnsoninc86
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I dunno bout the head gasket or the warped head, i think those are prone to the 2000+ models. As for the rest of the stuff, expect the rear main seal to leak, expect the valve cover gasket to start leaking, expect the power window lock to start acting up and not let the passengers open up their windows. I dunno about much else. Expect the headlights to suck @ss also. As for things to look for, if you plan on wheelin the rig, look for a back axle that has a flat bottom, which will be the 8.25 axle. Good hunting!

98 XJ Sport
07 JKU Sahara
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post #3 of 29 Old 02-02-2006, 07:48 PM
thooogy
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There's a TSB for the '99s (and '98s) about an electrical glitch. Sometimes the airbag light comes on and the tach & spedo both drop to zero. Other gauges work. It can last a few seconds or an hour or more. Sometimes tapping on the plastic (or hitting a bump) will get it to come back.

As you can probably guess I have this one. Sounds easy to fix but I don't have the time or inclination to rip open my dash (yet).

Check the sticky up above for the details.
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post #4 of 29 Old 02-02-2006, 07:53 PM
thooogy
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Well, never mind the sticky above but you can search for it online.
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post #5 of 29 Old 02-02-2006, 09:34 PM
liviu
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'99 is an excellent choice. The exhaust manifold will crack (or already has), oil may leek here and there. Overall a very good choice (not a 98 though not a '00): round intake manifold, head with larger exhaust passage. Good luck.
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post #6 of 29 Old 02-02-2006, 10:22 PM
Dannyboy18
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Yes. I can agree with ALL of the above on my '99:

1.) airbag light has come on randomly (only once); kind of scared me haha

2.) oil leaked from:
- oil filter adapter (common)
- transmission cooler line (also common)
* rear main seal + valve cover gasket = fine * (also places to check for leakage)


3.) exhaust manifold has a couple small cracks that like to tick and crap; already happened before I bought it.

Besides that, I've had no major issues what so ever. I love my XJ!

--Dan

1999 Cherokee Sport - Black; 4.0L AW4, NP231 w/ D30 and 8.25C.
RE 3.5" Super Ride w/ full packs (4* shims) + OME shocks + RE SYE w/ Tom Woods CV
Yukon 4.10s
AR Baja Alloy Wheels - 15x8 + Bridgestone Dueler Revo A/Ts - 31x10.50x15
TeraFlex Adj. Trackbar + TeraFlex Quick Disconnects & WARN T-case skid
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post #7 of 29 Old 02-02-2006, 10:23 PM
Dannyboy18
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Quote:
Originally Posted by liviu
'99 is an excellent choice. The exhaust manifold will crack (or already has), oil may leek here and there. Overall a very good choice (not a 98 though not a '00): round intake manifold, head with larger exhaust passage. Good luck.
Waiit, what are you talking about with the intake manifold and exhaust passage... I never heard of this; is this unique to the '99s?

--Dan

1999 Cherokee Sport - Black; 4.0L AW4, NP231 w/ D30 and 8.25C.
RE 3.5" Super Ride w/ full packs (4* shims) + OME shocks + RE SYE w/ Tom Woods CV
Yukon 4.10s
AR Baja Alloy Wheels - 15x8 + Bridgestone Dueler Revo A/Ts - 31x10.50x15
TeraFlex Adj. Trackbar + TeraFlex Quick Disconnects & WARN T-case skid
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post #8 of 29 Old 02-03-2006, 05:22 PM Thread Starter
blakely03
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Thanks for all the advice so far!

I guess my main question is about the cooling system. I have looked at 2 different 99 Cherokees and they both have had this sediment in the filler neck of the radiator.

I am just wondering what the most common cause of a leak in the cooling system would be on this model year? (radiator, head gasket...etc.)
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post #9 of 29 Old 02-03-2006, 06:42 PM
JoBo
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There's nothing exotic about the engine, cooling system or heater on a 99 that should cause problems. Sounds like the PO didn't change the coolant. HOWEVER I have read that they changed to the newer heads that crack in the 2000 and newer 4.0L engines in mid 99 You can check the casting number between cylinders 3 & 4 on the flat part of the head by the intake manifold. The bad/weak casting is "0331" It could be cracked and leaking and a PO may have used BARS or something to stop the leak

Edit. The round intake runners and highter exhaust ports are on the later 0331 heads.
Edit again. The airbag TSB was to move the control unit from under the drivers seat to under the dashboard.

JoBo
Columbus, Ohio USA
2006 KJ CRD Atlantic Blue Pearl Coat Limited
2000 Cherokee Classic with factory 16" wheels

Last edited by JoBo; 02-03-2006 at 06:52 PM.
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post #10 of 29 Old 02-03-2006, 06:47 PM
olds442
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mine always has problems with sensors and weird stuff but i never fix any of it and it never fails me to run but just does weird stuff sometimes but whateva it doesnt let me down

Family Wheelin...
Dad- '08 JK Rubicon- Stock, BB and 33s coming
Sister- '07 FJ Cruiser- Rear locker, BFG A/Ts
VT
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post #11 of 29 Old 02-03-2006, 09:19 PM
Renegade_Rick
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Just bought a 99 myself and they are nice to drive. 99 is one of the better years for the xj actually. Mine leaks water on the passanger floorboard from a bad heater gasket. Jeep used a foam gasket that tends to leak. It's easy to fix with silicone. Mine also needs a new pinion seal in the front. The xj has not been made in a wile so you will not find a perfect one. Use any small problems you find as bargaining points. As far as the cooling system goes drive the jeep up a steep hill at 15-20mph. If it gets hotter than 211 then the cooling system may need work. I can drive mine up super steep gravel roads with 500 pounds worth of people in it and it will stay at 211. With the outside temp at say 45-50. Also the if the Xj warms up fast and the heater works really well without over heating chances are the cooling system is good.


R

1999, Sport, 4-door, 4L-I6, AW4 auto, np231, 8.25 rear, dana 30 h-p.
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post #12 of 29 Old 02-03-2006, 10:17 PM
sbxj
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I've had my 2001 for about a year now and it's the last Jeep I want to own
My old '93 was a better vehicle in many ways
Jeeps are noisy as hell and rattles are very common even when new
If you're not use to a noisy, clanky vehicle with annoying electrical problems I'd seriously look elsewhere
btw, yes '99 heads do crack

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post #13 of 29 Old 02-04-2006, 01:07 AM
Dannyboy18
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Quote:
Originally Posted by sbxj
I've had my 2001 for about a year now and it's the last Jeep I want to own
My old '93 was a better vehicle in many ways
Jeeps are noisy as hell and rattles are very common even when new
If you're not use to a noisy, clanky vehicle with annoying electrical problems I'd seriously look elsewhere
btw, yes '99 heads do crack
Hmmm, someone doesn't like their XJ...

I love my Jeep. Sure it has it's stupid issues but whatever; when I'm offroading and doing things most vehicles can't, it's totally worth it.

--Dan

1999 Cherokee Sport - Black; 4.0L AW4, NP231 w/ D30 and 8.25C.
RE 3.5" Super Ride w/ full packs (4* shims) + OME shocks + RE SYE w/ Tom Woods CV
Yukon 4.10s
AR Baja Alloy Wheels - 15x8 + Bridgestone Dueler Revo A/Ts - 31x10.50x15
TeraFlex Adj. Trackbar + TeraFlex Quick Disconnects & WARN T-case skid
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post #14 of 29 Old 02-04-2006, 06:48 AM
sbxj
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Quote:
Originally Posted by Dannyboy18

I love my Jeep. Sure it has it's stupid issues but whatever; when I'm offroading and doing things most vehicles can't, it's totally worth it.

--Dan
That's a good point you make Dannyboy

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'99 WJ Laredo, 4.0L with HID Retrofit

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post #15 of 29 Old 02-04-2006, 09:59 AM
mdoug445
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I really like mine as well. but it has issues. as in a need for a full tranny rebuild. im trying to decide whether or not to trade it in while its still ok. its never left me stranded and ive never been able to get it stuck. except for the time i tried to drive through a snowbank. its a fun truck, but it has issues.

Gone: 97 Cherokee Sport
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