Another oil leak thread - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 07-19-2013, 10:15 PM   #1
Jeeper
 
bcmercer's Avatar
 
Join Date: Jun 2012
Posts: 15
Another oil leak thread

I've researched this and found several others that have had the same problem, but I can't find a solution. Hoping someone out there can help!

87 YJ 4.2l I6, nuttered, running a motorcraft carb.

Got oil puking up from the dip stick.

Running a manual oil pressure gauge. Checked the PCV valve and it is good, rattles and has good vacuum, CCV valve is running to a port on the carb to the breather and it is clear also. Compression is good on all the cylinders.

Recently replaced the oil pump due to low oil pressure. According to the dipstick, I'm a quart low on oil, but it's still coming up through the dip stick.

What am I missing, and what can I check next???

Thanks for any and all advice!!

bcmercer is offline   Quote Quick Reply
Old 07-19-2013, 10:54 PM   #2
Jeeper
 
Join Date: Jun 2013
Posts: 27
Hello , Well I am running about the same set up 4.2, .30 over rv cam, milled head. Nuttered and running motorcraft 2100 carb .Recent rebuild and only 5,000 miles on engine I Finally ran another pcv valve into the other hole in the valve cover. So I have a pcv valve in the front hole, and I put a tee in the back pcv hose and ran the front pcv hose into it. It has done the trick so Far. Everyone I have talked to have said it is probably something wrong with the rings, But with such good compression it does not make sense. One guy also mentioned that maybe the oil pick-up tube loosened up or a seal in the pump is leaking and squirting extra pressure into oil pan. I will be checking that tomorrow. Let me know how it goes and I used 3/8 tubing which should be the correct size for the pcv line Goodluck

90jeepguy is offline   Quote Quick Reply
Old 07-19-2013, 11:02 PM   #3
Jeeper
 
Join Date: Apr 2013
Location: Phoenix, AZ
Posts: 118
I had serious oil blowback coming from the valve cover vent that feeds from the rear hole in the valve cover to the carb and it turns out it was my timing. Once I set it the blowback stopped. Dunno if that will help you or not but it's worth a look.
__________________
1990 YJ 4.2L
Currently in the shop for an 8.8 swap!
Meshugga is offline   Quote Quick Reply
Old 08-18-2013, 12:48 PM   #4
Jeeper
 
bcmercer's Avatar
 
Join Date: Jun 2012
Posts: 15
Sorry for the lack of new info on this problem! I've been out of town and have not been able to spend much time on the Jeep.

So far I've switched the vacuum on the PCV valve to get stronger suction, and actually replaced the oil pan gasket again as it was leaking up front. I thought this had solved the problem but after a quick ride in the mud yesterday I was greeted with an oily starter. I zip tied a paper towel to the dip stick tube to try to be sure that's where the oil was coming from, and it was soaked. This is much too high up to be coming from anywhere else.

I will try the timing adjustment this week to see if that helps.

Any other suggestions? My oil pressure has been running between 30 & about 55...
bcmercer is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

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.



Thread Tools

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 Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:31 AM.



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