coolant leak from oil pan, help? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 05-06-2013, 05:54 AM Thread Starter
xxxxxxxxranger_1999
Guest
1998 ZJ 
 
Join Date: Mar 2011
Location: Forest City
Posts: 515
coolant leak from oil pan, help?

Okay here's the ordeal. If i leave my jeep for a few days without driving, say 2 or 3 days, i will start to have coolant leaking down the oil pan from what looks like the bottom of the crankshaft pulley.

I cant actually tell where its coming from, i can only see in a limited space. Its not a horrible drip, but a small puddle every few days of not driving.

I replaced my waterpump and t stat before Christmas. I used RTV on the seals as well. im not ruling those out, but i cant see the bottom of the waterpump to actually tell or not.

Someone mentioned a freeze plug? but i would like more input if possible.

xxxxxxxxranger_1999 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 05-06-2013, 06:22 AM
Uniblurb
Web Wheeler
 
Uniblurb's Avatar
1996 ZJ 
 
Join Date: Jan 2012
Location: Central
Posts: 6,982
When you installed the new water pump did you clean all the gasket/dirt off of the bottom mating surface super good where the oil/grime accumulates above the timing chain cover? Did you install a new water pump inlet tube as can be seen in the below link or just use the old one? Sometimes the old ones are hard to seal correctly and can leak. Also make sure your hoses are tight.

http://shop.advanceautoparts.com/web...ater+pump+tube

While you can't see exactly where the bottom of the pump meets the block look to see if the coolant may be coming out of the weep hole which would indicate a faulty pump.

Most likely wouldn't be a freeze out plug since they're on the sides of the block. And since the T-stat is in full view on the front of the 4.0 you should be able to see if it's leaking. Good luck.
Uniblurb is online now  
post #3 of 8 Old 05-06-2013, 06:25 AM Thread Starter
xxxxxxxxranger_1999
Guest
1998 ZJ 
 
Join Date: Mar 2011
Location: Forest City
Posts: 515
thank you, yes i did clean the opening well, chisled the old gasket off and used acetone on a rag and cleaned the whole area well. unfortunately i had to use the old hose inlet tube, as the were out of stock for new one. I guess ill just pull the fan off and take a closer look.
Thank you..

although i find it odd it doesnt leak after i drive it. Its just after 2 days or more of sitting.
xxxxxxxxranger_1999 is offline  
post #4 of 8 Old 05-06-2013, 07:00 AM
Uniblurb
Web Wheeler
 
Uniblurb's Avatar
1996 ZJ 
 
Join Date: Jan 2012
Location: Central
Posts: 6,982
YW and if you can remove the fan clean everything off with spray brake cleaner then you may be able to see where the coolant is coming from after sitting. They also sell a UV marker you can use or eventually the coolant should leave a trail/residue where it's leaking.

I've also had to use the old inlet tube on new/rebuilt pumps before and supposedly on some there's an o-ring down in the port which needs replaced. But after putting gasket sealer on the threads it seems like they don't always bottom out but haven't had them leak after doing this. And I do use gasket sealer (Ultra Black) rather than regular RTV on any coolant mating surfaces even with a water pump gasket.
Uniblurb is online now  
post #5 of 8 Old 05-06-2013, 10:53 AM
dellis
Registered User
2005 WK 
 
Join Date: Feb 2013
Location: Vienna
Posts: 470
I had a small leak that looked like it was beading off the oil pan at the front, and I assumed it was the water pump ... replaced the water pump, but the leak continued.

It turned out to be the top radiator hose had a small pin-hole. I discovered it by moving it around while the car was hot.
dellis is offline  
post #6 of 8 Old 05-06-2013, 10:56 AM
PolkaPower
Registered User
1998 ZJ 
 
Join Date: Aug 2011
Location: The Abyss
Posts: 19,374
How about the coolant bypass hose?
PolkaPower is offline  
post #7 of 8 Old 05-06-2013, 12:27 PM Thread Starter
xxxxxxxxranger_1999
Guest
1998 ZJ 
 
Join Date: Mar 2011
Location: Forest City
Posts: 515
Ok thanks. Ill check more thoroughly
xxxxxxxxranger_1999 is offline  
post #8 of 8 Old 05-07-2013, 04:31 AM
shaban
Registered User
1996 ZJ 
 
Join Date: May 2012
Location: Yarraville
Posts: 571
Mine's doing that, but it sort of weeps from thermostat housing gasket, then drips on the pump and all the way down to the sump.
shaban is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome