Oil in radiator fluid, and engine cutting out when warm. - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ General Discussion Forum

Join Wrangler Forum Today


Like Tree7Likes
  • 1 Post By Crazysjeep
  • 2 Post By Luckymac
  • 3 Post By IRQ
  • 1 Post By Got it at last
Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-04-2019, 01:15 AM
Thread Starter
  #1
Jeeper
 
BeatleBailey's Avatar
 
Join Date: May 2019
Location: Las Cruces, NM
Posts: 52
Oil in radiator fluid, and engine cutting out when warm.

Took the 88yj for run after a motor flush, fluid change and thermostat change. It ran great. Lugging hills, high way driving, no over heating issues. Once on highway going home jeep heated up just a little over 210 degrees which did not bother me. But jeep would stall or sputter every time i changed gear and stepped on gas pedal. Now once in town jeep cooled down and stopped stalling.



I did notice what appears black oil in fluid at top of radiator as I removed cap. Engine oil is new and I suspect oil from before that was in engine before I purchased the jeep. I suspect motor had issues before it was installed. Is there a way to tell if the jeep originally came with a different motor. Even motor size.



I just recently bought this used 88yj. Fluids were clean looking till I got it home. Lot of problems with this one, but have most of them sorted out now and upgrading. I think the fuel is trying to boil so looking on best place to route the fuel lines. Does anyone have a heat shield suggestion? I am even considering putting vents into hood to help.

Attached Thumbnails
Click image for larger version

Name:	IMG_0479.jpg
Views:	16
Size:	236.5 KB
ID:	4161475  
__________________
1988 yj wrangler. 6cyl, inline. Dual V-belt. Stock Carb for now. BA-10 manual tranny. Stock diffs 35/30/ 4 inch lift with 31 inch tires 5 lug. Nutter bypass.
BeatleBailey is offline   Quote
Old 07-04-2019, 02:56 AM   #2
Jeeper
 
Crazysjeep's Avatar
 
Join Date: Jun 2019
Location: Ellwood City pa
Posts: 161
Sounds like a blown head gasket
BeatleBailey likes this.

Crazysjeep is offline   Quote
Old 07-04-2019, 12:30 PM   #3
Moderator

WF Supporting Member
::WF Moderator::
 
Luckymac's Avatar
 
Join Date: Jan 2014
Location: SouthEast of Denver
Posts: 8,076
Sounds like a blown head gasket. Do a compression test.
A leak down test will be even better. With pressure on the cylinder with the leak, you might see bubbles in the radiator with the radiator cap off.

The PO might have put some "head gasket stop leak" in the cooling system that you flushed out when you did your flush.
You did the right thing by doing the flush. Pulling the head and having a machine shop plane it back to true isn't too big a job. Have the shop boil the head, do a valve job and replace the valve seals while they have the head. Ask the shop about better valve seals than the plain "umbrella" style. They require a bit of machining but I believe they're worth the few extra dollars.

Let us know what you find.

Good Luck, L.M.
87_WhyJay and BeatleBailey like this.
__________________
"Wrangler....It's not just a vehicle, It's a lifestyle".
.................................................. ........................
1987 YJ-4.2L-Standard Shift- Re-manufactured Carter Carb-2" body Lift-31X10.5X15 BFG KOs-190K Miles No back seat.
HEI distributor with computer and all related relays and wiring removed.
12K Badlands winch with dual batteries.
Warn front bumper. Matching imitation Warn bumper on the rear.
Luckymac is offline   Quote
Sponsored Links
Advertisement
 
Old 07-04-2019, 12:47 PM   #4
IRQ
Jeeper
 
IRQ's Avatar
 
Join Date: Dec 2014
Location: NY
Posts: 2,038
Drain some of the fluid and take a photo of it, while you do have symptoms indicating a head gasket issue, I learned recently this is not always the case.
  • On the left we have fluid from a radiator that has the color consistency of oil, with a slight sheen
  • On the right we have oil with antifreeze
Attached Thumbnails
Click image for larger version

Name:	9322B277-FA7B-40FC-A815-3A2E164DDE6F.jpg
Views:	13
Size:	234.0 KB
ID:	4161547  
__________________
1995 Rio Grande • 2.5L • AX-5 • 50,000 miles • Stock
IRQ is offline   Quote
Old 07-04-2019, 11:14 PM
Thread Starter
  #5
Jeeper
 
BeatleBailey's Avatar
 
Join Date: May 2019
Location: Las Cruces, NM
Posts: 52
LuckyMac is close. I looked at oil and it was rust But it floated. Looked the color or IRQ bottle on the right. Now new Fluid is not mixing with this rust and had it looked at by another who suggested stop leak of some sort.



If I pull head, is there any upgrades like rocker rollers you would suggest for trail riding and such.
__________________
1988 yj wrangler. 6cyl, inline. Dual V-belt. Stock Carb for now. BA-10 manual tranny. Stock diffs 35/30/ 4 inch lift with 31 inch tires 5 lug. Nutter bypass.
BeatleBailey is offline   Quote
Old 07-05-2019, 11:18 PM   #6
Supporting Member

5-Year WF Supporting Member
 
Got it at last's Avatar
 
Join Date: Nov 2016
Location: Phoenix, Az
Posts: 1,456
On your fuel lines, they are routed like everyone else's. One thing you should do is turn your fuel filter so the port to the fuel tank return line is above the carb feed, and for the 3 bucks they cost you might want to replace it if you haven't already.
BeatleBailey likes this.
__________________
'89 YJ 4.2 with MC-2150 Carb & HEI, 2-1/2" Magnaflow Exhaust. BA-10, NP231, Adams front Diveshaft, SYE kit, 31x 10.5 x15 BFG KO's, 2 1/2" Rancho Spring kit, 1" Body Lift. RS5000x shocks, No emissions.

FSM Manuals https://www.dropbox.com/sh/0vfmk6jc5...v7lceZk7a?dl=0
Got it at last is offline   Quote
Old 07-14-2019, 12:31 AM
Thread Starter
  #7
Jeeper
 
BeatleBailey's Avatar
 
Join Date: May 2019
Location: Las Cruces, NM
Posts: 52
TY GIAL, i cant believe i missed that. Little things that make a diff. Considered putting some braided lines in. Want to get the drag and sway links off but have to install extended brake lines. Also the tie rod ends showing signs of wear........I am seeing a pattern here lol.

__________________
1988 yj wrangler. 6cyl, inline. Dual V-belt. Stock Carb for now. BA-10 manual tranny. Stock diffs 35/30/ 4 inch lift with 31 inch tires 5 lug. Nutter bypass.
BeatleBailey 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






All times are GMT -5. The time now is 02:36 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

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