Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Loosing Coolant, no visible leaks...

Thread Tools
 
Search this Thread
 
Old Jul 28, 2016 | 12:35 PM
  #16  
95Cherokee's Avatar
CF Veteran
 
Joined: Feb 2009
Posts: 2,203
Likes: 3
From: Houston Tx.
Year: 1995
Model: Cherokee
Engine: 4.0
Default

I've been having to add about 2 cups of coolant a month for the last 7 years, I don't know where it goes but I don't worry about it.
Reply
Old Jul 28, 2016 | 12:46 PM
  #17  
extrashaky's Avatar
Banned
 
Joined: Feb 2014
Posts: 2,379
Likes: 18
From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
Default

Originally Posted by Firestorm500
I would not drive it until diagnosis is complete. If coolant is getting to the bearings, even a little of it, it is ruining them.

You would not be able to see coolant contamination in modern oils with the naked eye unless it is REALLY bad.
I agree with this. I also would be reluctant to drive it because of potential for continued bearing damage.

To expand on the thing with the oil, when a motor cools down, condensation forms on the metal surfaces inside the motor. Motor oils have a detergent package in them that is intended to bond to this moisture on startup to reduce the amount of damage it does until the motor is hot enough to boil it off.

Thirty years ago if you overwhelmed the detergent package with a coolant leak, the water would form a milky-looking emulsion in the oil. Now, however, the detergents have gotten so good that you can have a considerable amount of water or coolant in your oil before you can see any definite change in the oil's appearance, even though you're still doing damage.

The only sure way to rule out coolant in your oil is to send off a sample to a lab for analysis. I use Blackstone, but there are others. They charge $28 for the analysis and send you a sample kit for free. I do this at every oil change on my vehicles because the oil analysis tells you a lot of other neat things about what's happening in your motor.

Originally Posted by halligan.evan@gmail.com
To be clear, you're referring to the rod bearings yes?
The cam bearings will probably go first.
Reply
Old Jul 28, 2016 | 12:47 PM
  #18  
Firestorm500's Avatar
CF Veteran
 
Joined: Apr 2009
Posts: 4,734
Likes: 12
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Default

Originally Posted by halligan.evan@gmail.com
That's understood, just a typo/typing habit from my old boxer in my sti.

To be clear, you're referring to the rod bearings yes? I'm tearing into this project this weekend and will report back to you guys asap, with pictures hopefully.

Appreciate the input though, I wasn't aware coolant wasn't visible in modern oil unless it's a bad leak, must've only dealt with bad leaks in the past!
Any and all bearings. Crank, rod, and especially cam.
Reply
Old Jul 28, 2016 | 01:15 PM
  #19  
extrashaky's Avatar
Banned
 
Joined: Feb 2014
Posts: 2,379
Likes: 18
From: Florida
Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
Default

I think Firestorm and I may be the same person today.
Reply
Old Jul 28, 2016 | 01:45 PM
  #20  
halligan.evan@gmail.com's Avatar
Thread Starter
Newbie
 
Joined: Jul 2016
Posts: 12
Likes: 0
Year: 1999
Model: Cherokee
Engine: 2.5L
Default

I appreciate all the input fellas, I'll be posting updates as soon as I get into it this weekend!
Reply
Old Jul 28, 2016 | 02:04 PM
  #21  
Firestorm500's Avatar
CF Veteran
 
Joined: Apr 2009
Posts: 4,734
Likes: 12
Year: 2015, 2012
Model: Grand Cherokee (WK2)
Engine: 3.6L
Default

Originally Posted by extrashaky
I think Firestorm and I may be the same person today.
Great minds think alike.

And post at the same time.
Reply
Old Mar 29, 2023 | 04:24 PM
  #22  
Konstantin's Avatar
Newbie
 
Joined: Mar 2023
Posts: 1
Likes: 0
Default

Originally Posted by halligan.evan@gmail.com
I appreciate all the input fellas, I'll be posting updates as soon as I get into it this weekend!
AND? Did you resolve the problem?
Reply
Old Mar 29, 2023 | 05:35 PM
  #23  
Saudade's Avatar
CF Veteran
5 Year Member
Veteran: Air Force
Community Favorite
 
Joined: Aug 2020
Posts: 2,121
Likes: 577
From: SoCal
Year: 1988
Model: Cherokee (XJ)
Engine: 4.0L
Default

Halligan.evan hasn't been back since 2016. If you're having an issue, I suggest you start a new thread so we can assist you further.

Welcome to the forum!!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jpmarine6786
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
22
May 23, 2016 02:46 PM
Axel1831
Cherokee Chat
2
Mar 28, 2016 12:23 PM
Gunmetal Pearl XJ
Modified XJ Cherokee Tech
8
Mar 26, 2016 12:01 PM
SlickXJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
Mar 19, 2016 07:13 PM
robert0550
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
7
Mar 3, 2008 05:32 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -5. The time now is 07:18 PM.