2001 Cherokee Refurb... - JeepForum.com
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post #1 of 36 Old 08-14-2021, 11:51 AM Thread Starter
Keyjeep
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Working on my Daughters 2001 Cherokee...
We bought it in 2010 with 65k miles...
Its been pretty good to her, and she now has 195k miles on it... along the way we had to replace the transmission, but thats the only big bit.
The last couple of years she has had a couple of overheat conditions... one was related to a bad radiator cap.... it was fine after that.
Last month it did it again... and I noticed that the coolant was rusty brown and sludgy.
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I cleaned it up, found a cracked radiator hose attachment, so replaced the radiator, pipes, thermostat, and flushed the system.


A week later it overheated again.
Now I was worried, so I investigated... an inspection found it still has the notorious 331 head.
A coolant test turned the tester fluid from blue to bright yellow in short order!
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Guess at 195k it had finally cracked.

A new head was ordered from Clearwater, and I put it on the last week.
Let me see if I can post some pics because the next part gets real interesting...

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Last edited by Keyjeep; 08-14-2021 at 12:01 PM. Reason: attaching pics
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post #2 of 36 Old 08-14-2021, 12:06 PM Thread Starter
Keyjeep
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Pulled off the old head, and was greeted by some good sights.


I taught her to change the oil at 3k miles, and the inside of the engine looks a nice color, that tells me she did good.

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Pulling the head revealed a nice sight... some carbon, but I still see honing marks....
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post #3 of 36 Old 08-14-2021, 12:15 PM Thread Starter
Keyjeep
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While I was in there cleaning everything up, I thought I should replace the water pump… and boy was I shocked!
No vanes left to pump!
Corroded away!
No wonder it overheated!

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New AC Delco pump
Looks better!



Crazy!

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post #4 of 36 Old 08-14-2021, 12:21 PM Thread Starter
Keyjeep
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Close inspection of the original head doesn’t show any cracks I can see…
But the middle head bolt shows some coolant and corrosion that the others don’t.
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post #5 of 36 Old 08-14-2021, 12:24 PM Thread Starter
Keyjeep
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New water pump on, everything cleaned up, so time to get it all back together.


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post #6 of 36 Old 08-14-2021, 12:40 PM Thread Starter
Keyjeep
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Got it all back together, and time for the big moment...






But I noticed a problem... a smell of fuel...
An inspection revealed that the leak was from the hard fuel line under the intake...




Odd, but I removed it and expected I had mayvbe bent it and it cracked when I moved the intake over a bit to removed the head...
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post #7 of 36 Old 08-14-2021, 12:46 PM Thread Starter
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Removal of the pipe shows that the failure is caused by the pipe rubbing on the clip that holds it to the intake.
Worth flagging for other people to be aware of.
I have a new pipe assembly on order and I think I’m going to wrap that pipe at the clip with a piece of rubber.
388f8dce-c252-45e9-86d5-2b83fbccb082_1628963058703.jpg5e32926f-1f68-43fe-a86c-d6f31b1f70a2_1628963043161.jpg
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post #8 of 36 Old 08-14-2021, 12:53 PM Thread Starter
Keyjeep
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The new pipe was $86 shipped from Summit Racing.

Upon filling the engine with coolant… I was freaked out to see coolant gushing from the back of the head.
Investigation revealed that the Clearwater head has a threaded port hole at the rear of the head upper deck that is not plugged… probably for a temp sender on some models…. Not on the OEM head. So gotta find a bolt or plug that fits.
Anyone know what thread it is?


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I would welcome any comment, thoughts or observations of course.
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post #9 of 36 Old 08-14-2021, 03:40 PM
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thanks for the photos.
Someone recently posted about the same leaking fitting on the cyl head, its a water temp fitting and a pipe thread. Would have been SOOO easy fast a fix to deal with before installed.

The water pump vanes erroded are a lesson - can't be the water pump water can't do that... will be sharing that pic.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #10 of 36 Old 08-14-2021, 06:55 PM Thread Starter
Keyjeep
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Yes, I would have plugged that hole had I spotted it! LOL...

Feel free to use my pic as an example!
I would note the the AC delco pump vanes are massively thicker material!
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post #11 of 36 Old 08-26-2021, 09:49 AM Thread Starter
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Update.
Found the correct plug for that threaded hole.
Filled the coolant, and Engine is up and running…
Then I moved my focus to the next issue which is the way the Jeep drives….
It wallows around on the road… follows cambers, darts left and right, and generally feels unsafe to me. Hints of death wobble sometimes.
A good inspection underneath showed a worn track bar ball joint, which I replaced with a complete Moog unit.
Next I found the sway bar bushings were worn, as well as the end links. All replaced with polyurethane now.
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Then I noticed the steering damper looked like it was leaking… and even if it wasn’t I was prob the original so replaced that with this upgraded unit.
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Decided that the 18s we’ve been running might not be helping the odd handling, so put my 5.9 GC Ltd wheels on as a test.
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Hoped that might be it, and took it to have the alignment checked.
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post #12 of 36 Old 08-26-2021, 10:00 AM Thread Starter
Keyjeep
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I tried to check if there was any wear in the front ball joints… but I could not seem to see any wear…. At 195k?
I jacked up the front, supported the axle tube(2wd), and levered under the tire looking for movement but couldn’t see any.
Maybe I’m doing it wrong?

Anyway, I took it, to have the alignment checked, and asked them to give it good look before they did.
The first thing they said is that the front upper and lower control arm bushings are shot/cracked/worn.
The second thing they said was the rear axle is out of alignment spec and the rear axle is pushed back on the passenger side.
Here is the sheet they game me.
The caster error might explain the odd handling and DW, and I will replace the bushings next week.
The rear axle issue I need some input on please?
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post #13 of 36 Old 08-26-2021, 11:18 AM
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so they are saying the rear axle is not aligned properly behind the front and its making the jeep drive a bit dog legged?

their computer is not any good since its saying to adjust rear toe, ha ha ha.

you might check all the rear spring mounts/bushings and maybe see if you are in need of some new rear leaf spring assemblies. maybe one side is flatter then the other so its kicking the axle a bit back farther

the xj is the only jeep left in the driveway
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post #14 of 36 Old 08-26-2021, 11:19 AM
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and that hole in the head was a temp sensor hole on my yj.

the xj is the only jeep left in the driveway
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post #15 of 36 Old 08-26-2021, 01:20 PM Thread Starter
Keyjeep
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Yeah.
The way I read it is they are saying the rear axle is +- 0.15 deg from 0. So .3 degree out overall? Doesn’t sound that bad to me, but that’s why I’m posting, to get some opinion.
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