02 wrangler x - coolant sensor or not? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-11-2010, 06:03 PM   #1
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
02 wrangler x - coolant sensor or not?

yikes. please help. re: my 02 wrangler x. i thought it was my coolant sensor that was bad but when i bought the part at auto zone it is not the same at all. I took the part out (where the leak was coming from - engine block passenger side, same height as oil filter but further back.) it's got a small threaded brass neck with a hole in the end and a relay plugs into it. what part is this, if not the coolant sensor? ive attached a pic of it below.

thanks for all the help
jc
Attached Thumbnails
Click image for larger version

Name:	DSCN1988.jpg
Views:	33
Size:	190.0 KB
ID:	17953  

jconway is offline   Quote
Old 04-11-2010, 06:34 PM   #2
Jeeper
 
06jeep's Avatar
 
Join Date: Apr 2009
Posts: 56
DUDE, thats your oil sending unit........
The coolant sending unit should be the neck of your thermostat.........

06jeep is offline   Quote
Old 04-11-2010, 06:48 PM   #3
Abe Froman

5-Year WF Supporting Member
WF Supporting Member
 
doclouie's Avatar
 
Join Date: Feb 2010
Location: Was in the mountains, now in Texas
Posts: 3,708
Images: 4
Ditto
__________________
2000 Sahara, 3.5" Rubicon Express Lift, 1" spring spacer & 1" Body Lift, 33" or 35" BFG Mud tires, Front & Rear ARB, Rancho 9000 shocks, UCF Ultra High Belly Up

doclouie is offline   Quote
Old 04-12-2010, 10:17 AM   #4
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
Guys, thanks. That's where the water leak was coming from. Can I assume that means the unit is bad? Any tricks as I replace it?
jconway is offline   Quote
Old 04-12-2010, 11:32 AM   #5
Jeeper
 
Join Date: Mar 2009
Location: Bixby, Oklahoma
Posts: 439
Coolant was coming from the OIL sending unit, or up by the thermostat housing?!! Not sure you want coolant coming from the oil sending unit.
__________________
At some point during jeep ownership, you will BUST A NUT!!!
T-BONE N BIXBY is offline   Quote
Old 04-12-2010, 04:10 PM   #6
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
t-bone, yes, the coolant/water was leaking out there, nearest we could tell. hell- does that signal something larger?
jconway is offline   Quote
Old 04-12-2010, 04:43 PM   #7
Jeeper
 
Join Date: Mar 2009
Location: Bixby, Oklahoma
Posts: 439
I don't really know, but when I heard the word oil and coolant in the sentence, I kinda got a bad feeling. BUT, I'm no mechanic.
Have you performed an oil change to see if there is coolant in the oil? Is the jeep running ok? No water dripping or pouring out the tailpipe? Just asking in case you have a blown head gasket.
I'm surprised Jerry B. hasn't jumped on this. He may chime in and give you some better insight than me. Whatever he has to say, believe it.
__________________
At some point during jeep ownership, you will BUST A NUT!!!
T-BONE N BIXBY is offline   Quote
Old 04-12-2010, 09:44 PM   #8
Jeeper
 
06jeep's Avatar
 
Join Date: Apr 2009
Posts: 56
are you sure the coolant was coming from there or do you have a soft plug leaking, maybe a hose leaking , could be just about anything. Check around that area really good might be coming from something other then the sensor.....
06jeep is offline   Quote
Old 04-12-2010, 11:15 PM   #9
Jeeper
 
Join Date: Mar 2010
Location: alstead, NH
Posts: 83
Images: 3
yup coolant and oil are bad mix head gasket or crack in block is what that means
2003wranglerRHD is offline   Quote
Old 04-13-2010, 09:34 AM   #10
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
The jeep was running great. temp was cool; oil pressure and level was good. saw water dripping out and it looked to be coming out just where the oil sending unit is located. as 06jeep mentions, i will look for other leaks around the site, but, gosh, it looked like it was coming out right there. As you can tell, Im a knucklehead but trying to learn more.

And, yes, I'm about to send jerry b a blank check in hopes of his giving me the best advice. He is such a huge help always.
jconway is offline   Quote
Old 04-13-2010, 11:22 AM   #11
Jeeper
 
06jeep's Avatar
 
Join Date: Apr 2009
Posts: 56
can't learn till ya dig into it.......lol coolant can br running down your block and making it look like its coming out from the Oil sending unit, move things around on that side I'm sure you'll find its coming from somewhere else......
06jeep is offline   Quote
Old 04-13-2010, 12:06 PM   #12
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 34,397
Images: 2
It's too hard to tell what is going on other than, hopefully, your source of water was external and above the oil pressure sender and it only looked to be coming out of the sender itself. Unless your head gasket has blown, the head is cracked, or the engine block is cracked, there is no way for water to get internally to where the oil pressure sender is. From how you say the engine is running, I can't imagine it having one of those three problems.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote
Old 04-13-2010, 05:27 PM   #13
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
thanks, jerry and others, for the replies. I will look for the phantom leak that is (probably)throwing water onto that part and surrounding area.

hoping for a hose leak.....

again, guys, thanks.
jconway is offline   Quote
Old 04-15-2010, 12:02 AM   #14
Jeeper
 
Join Date: Nov 2009
Location: Jackson, MS
Posts: 19
UPDATE: as you guys suggested, the water leak is coming from somewhere behind the engine block, sort of on the passenger side. The engine does not run hot, and the oil is pure (no froth, evidence of water.) The water seems to be leaking just between engine and firewall (and dripping on oil sending unit) but I can't see a leaking hose. any idea what's back there? AND could it be related to why the heater seems to run cold at idle speed, but warms up when revved or driving?

jconway is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing Coolant Sensor - 02 Wrangler X jconway TJ Tech Forum 1 04-08-2010 11:00 AM
No diesel for Wrangler shenandoah JK General Discussion Forum 26 02-08-2010 10:59 AM
Fellow Ohio Jeepers Help fick15 Ohio Jeep Forum 11 01-19-2010 11:56 PM
New 2010 Jeep Wrangler Suggestions bradw JK General Discussion Forum 1 01-17-2010 05:12 AM
2003 TJ Burning Coolant kenpoengineer TJ General Discussion Forum 6 02-13-2009 02:22 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:01 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC