Head gasket? - 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 08-17-2014, 01:02 PM   #1
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Head gasket?

I'm not getting much help on this one, which I normally do from WF. but I think I may have blown a head gasket. Got white smoke and knocking noise. All my gauges read normal. My question is how hard is this before I tackle this. I have done basic pull and plug parts such as water pump, oil pump, fuel pump, etc... Am I looking at a lot of work when I start this. I do have a video if anybody wants to take a look to see where smoke is coming from and can tell the knocking sound.

Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 02:42 PM   #2
Jeeper
 
GreggM's Avatar
 
Join Date: Apr 2014
Location: Michigan
Posts: 207
I say post the video and let the smart guys assist

GreggM is offline   Quote Quick Reply
Old 08-17-2014, 02:51 PM   #3
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Are you sure it's a knock? I've haven't met a 4.0 that doesn't have a little lifter tick..

I can tell you that a head gasket job is pretty easy and just like you had done the basics before. I got here torn down in about two hours (and that includes taking pictures, labeling baggies and wires, put stuff in the baggies, etc) and put back together in a little less than four. Read up on how to do it and have a manual with you and you will be fine.

A word of advice though is to pull the head, intake, and manifold off as one piece. It's a little awkward (and heavy for some) but man does it make it easy.

Don't forget to get the head resurfaced and replace the manifold while your at it. Cause pretty much every stock one out there is cracked
__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-17-2014, 02:58 PM   #4
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Not sure why it won't let me edit my post...

See the pictures for what I mean about pulling it out as one piece. Here's a link to my Comanche build where I did the head gasket for it. There's more pictures there.
http://ComancheClub.com/topic/37879-...placement-608/

And in the other picture you can see the coolant pooling in cylinder #6 and she was honestly running fine. Not great, but not horrible. So I believe you when you say it's running fine and the gauges are okay.
Attached Thumbnails
Click image for larger version

Name:	image-2956141621.jpg
Views:	35
Size:	130.1 KB
ID:	1400970   Click image for larger version

Name:	image-1448848044.jpg
Views:	39
Size:	148.2 KB
ID:	1400978  

__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-17-2014, 03:00 PM   #5
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 03:02 PM   #6
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
The end of the video when I go underneath is when you can hear the knocking. Didn't realize you can't hear it when I was above. I could repost a new one, but there is a lot of white smoke coming out of the exhaust too.
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 03:03 PM   #7
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Oh and it's a 4.2, not a 4.0
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 03:10 PM   #8
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Quote:
Originally Posted by Jevenson View Post
Oh and it's a 4.2, not a 4.0
I'm not that familiar with the 4.2 but I thought the only difference was the carburetor
__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-17-2014, 03:18 PM   #9
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
When I just started it back up to turn it around in my garage, the knock wasn't as bad, a lot more smoke than prior. In higher RPMs the knock got horrible. And to make my life more miserable all of my lights died at once in my garage before I could even get started on trying to pluck this apart.
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 03:20 PM   #10
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Zack93 View Post

I'm not that familiar with the 4.2 but I thought the only difference was the carburetor
Pretty much, same torque specs for the cylinder heads. The 4.2l uses a thin metal gasket instead of a normal gasket that the 4.0l uses
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-17-2014, 03:22 PM   #11
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
When I just started it back up to turn it around in my garage, the knock wasn't as bad, a lot more smoke than prior. In higher RPMs the knock got horrible. And to make my life more miserable all of my lights died at once in my garage before I could even get started on trying to pluck this apart.
This sounds more like a piston ring issue, but pull the cylinder head and look at the piston rings carefully. Have you even run a compression test? That would have been my first step
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-17-2014, 04:42 PM   #12
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Don't own a tester yet. Bought this thing to learn about vehicles and just buying parts and tools as the problems come. I'm just upset how great the engine itself was running and then this happened out of nowhere.
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 05:07 PM   #13
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
Don't own a tester yet. Bought this thing to learn about vehicles and just buying parts and tools as the problems come. I'm just upset how great the engine itself was running and then this happened out of nowhere.
Sounds like a ring problem, a blown headgasket would have put oil in the coolant and coolant in the oil. Open your radiator cap and see if there's a milky deposit left on the underside of cap.
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-17-2014, 05:17 PM   #14
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Quote:
Originally Posted by Jevenson View Post
Don't own a tester yet. Bought this thing to learn about vehicles and just buying parts and tools as the problems come. I'm just upset how great the engine itself was running and then this happened out of nowhere.
You can 'rent' them from autozone or the alike for free
__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-17-2014, 05:35 PM   #15
Jeeper
 
DREDnot's Avatar
 
Join Date: Jul 2014
Location: Phoenix, AZ
Posts: 172
Get that compression tester. The screw in kind. Take a spark plug with you to make sure you get the right thread.

A vacuum gauge is a handy diagnostic tool also

__________________
'91 YJ Sahara 4.0L/AX-15/NP231, D30/D35 @3.07
'12 KK Cherokee 3.7L/42RLE/MP1522, D30M/8.25 @3.73
"Non vi sed, Arte"
DREDnot is offline   Quote Quick Reply
Old 08-17-2014, 07:02 PM   #16
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Quote:
Originally Posted by c5wagner View Post
Sounds like a ring problem, a blown headgasket would have put oil in the coolant and coolant in the oil. Open your radiator cap and see if there's a milky deposit left on the underside of cap.
No milky residue, going to test stuff tomorrow. If it's a blown ring, does this make my job harder, easier?
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 07:08 PM   #17
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
No milky residue, going to test stuff tomorrow. If it's a blown ring, does this make my job harder, easier?
Harder, you'll have to pull the engine out and apart. You can always check craigslist for another motor
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-17-2014, 08:59 PM   #18
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Sorry to bother people, but as I said new to this stuff. After looking at my overfill, it does appear to have oil in with the water, dipstick does appear to be a little bubbly and the smoke has a real sweet smell to it. I'll ask for more help after I test it tomorrow, but I got this to learn so it will probably be a rebuild if anything. So I am going to be annoying the hell out of this forum
Jevenson is offline   Quote Quick Reply
Old 08-17-2014, 09:08 PM   #19
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
Sorry to bother people, but as I said new to this stuff. After looking at my overfill, it does appear to have oil in with the water, dipstick does appear to be a little bubbly and the smoke has a real sweet smell to it. I'll ask for more help after I test it tomorrow, but I got this to learn so it will probably be a rebuild if anything. So I am going to be annoying the hell out of this forum
We're ready for you! I've pulled my engine apart twice. Once for a rebuild, and once to replace my rings from running too lean
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-18-2014, 10:32 AM   #20
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Quote:
Originally Posted by Jevenson View Post
Sorry to bother people, but as I said new to this stuff. After looking at my overfill, it does appear to have oil in with the water, dipstick does appear to be a little bubbly and the smoke has a real sweet smell to it. I'll ask for more help after I test it tomorrow, but I got this to learn so it will probably be a rebuild if anything. So I am going to be annoying the hell out of this forum
Honestly, I don't think it will be as hard as you think. Just read the write ups out there, take lots of pictures, label both sides of the pigtails, put the bolts into zip lock baggies and label the bags and you will be good to go. I'm studying to be an architect, never had any mechanics training, and I though it was pretty easy. Those I6s are pretty darn easy motors to work on.
__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-18-2014, 04:04 PM   #21
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
I'm just a dumb army guy trying to figure out how to ground my coil wire.
Jevenson is offline   Quote Quick Reply
Old 08-18-2014, 06:26 PM   #22
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
So during compression check, my battery died. First three were 148,150 and 148. I just had a dead Jeep minutes before this happened and replaced the alternator right before this so I was hoping I had enough charge, guess not. My question I have to finish this can I hook up my jeep to another vehicle or will that effect my readings?
Jevenson is offline   Quote Quick Reply
Old 08-18-2014, 06:30 PM   #23
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
So during compression check, my battery died. First three were 148,150 and 148. I just had a dead Jeep minutes before this happened and replaced the alternator right before this so I was hoping I had enough charge, guess not. My question I have to finish this can I hook up my jeep to another vehicle or will that effect my readings?
Those numbers look good so far, you should charge the battery because there won't be enough juice to run the starter by jumping from another vehicle. You might be able to pull the battery out of the other vehicle and try that way
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-18-2014, 06:52 PM   #24
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
I know it normally takes two bad readings, side by side for a head gasket, but if it continues this way, is my head gasket guess still a possibility?
Jevenson is offline   Quote Quick Reply
Old 08-18-2014, 07:15 PM   #25
Jeeper
 
c5wagner's Avatar
 
Join Date: Apr 2013
Location: Reno, Nevada
Posts: 1,366
Quote:
Originally Posted by Jevenson View Post
I know it normally takes two bad readings, side by side for a head gasket, but if it continues this way, is my head gasket guess still a possibility?
Yep, if there's oil in the coolant, that's the best clue of all
__________________
1989 Base YJ, 4.2l, Borla exhaust, offy intake, Motorcraft 2150 carb, CRT HEI ignition, ax15, np231 JB conversions SYE, D30 ARB & Ford 8.8 ARB 4.56, 35x12.5r15 Goodyear MTR's, bds 3.5" springs, 1" body lift, and 1/2" Boom Shackles.
Build Thread: http://www.wranglerforum.com/f330/fi...ld-385106.html
c5wagner is offline   Quote Quick Reply
Old 08-18-2014, 07:29 PM   #26
Jeeper
 
Zack93's Avatar
 
Join Date: Feb 2011
Location: 937, Ohio
Posts: 294
Quote:
Originally Posted by c5wagner View Post
Yep, if there's oil in the coolant, that's the best clue of all
I had oil in my coolant but no coolant in my oil lol
__________________
The above is not intended to offend, insult, or ridicule in any way, shape or form.
1995 YJ, 1992 MJ,1998 XJ,
تفخر الكافر -Proud Infidel
Zack93 is offline   Quote Quick Reply
Old 08-18-2014, 07:44 PM   #27
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
That is making me confused a little, my coolant in the radiator looked nice and green, but in overfill resevoir seems to have some brown tint to it. I ran it for about 20 minutes earlier today, but my temp didn't get hot enough to even open my thermostat. Steam came from where the radiator cap was, but my garage was nice and smoky when I turned it off.
Jevenson is offline   Quote Quick Reply
Old 08-18-2014, 08:01 PM   #28
Jeeper
 
Free Bird's Avatar
 
Join Date: Mar 2014
Location: Naples, Fl
Posts: 37
did you finish the compression test?
Free Bird is offline   Quote Quick Reply
Old 08-18-2014, 08:13 PM   #29
Jeeper
 
Jevenson's Avatar
 
Join Date: Mar 2014
Location: Georgia
Posts: 162
Quote:
Originally Posted by Free Bird View Post
did you finish the compression test?
Not yet, I have been convinced that it was the head gasket the whole time, but started to late tonight and didn't feel like driving to get a charger or a battery. And my wife is due any minute, so can't really take battery out of the exploder
Jevenson is offline   Quote Quick Reply
Old 08-18-2014, 08:20 PM   #30
Jeeper
 
Join Date: Aug 2011
Location: north of St.Franisville La.
Posts: 2,095
Send a message via Yahoo to Nubby55
do the rest of the compression check, some thing is wrong, it could a lot of things, got to find what it is first before crying in your pudding, let use know. oh an I pull all the plugs and check it with the gas pedal on the floor as in WFO.
After you run the check, squirt some motor oil in each cylinder and check them all again, this should tell you if it's a bad ring. three or four good pumps from an old type oil squirt can.

__________________
The Government can not give anything to anybody that it does not first take from someone else !
Nubby55 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




» Featured Product

All times are GMT -5. The time now is 03:49 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