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FrEaKy FrIdAy SaLe!!!!NEW!! HMF 50"-52" light bar mounting brackets!! The ULTIMATE "Selectable" Locker System! Brough

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Unread 11-05-2012, 06:43 PM   #136
schaef89
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1989 YJ Wrangler 
 
Join Date: Mar 2010
Location: Pittsburgh, PA
Posts: 846
Bad news bears..


Ran another compression check with some unsettling results

#1 - 10 dry, 10 wet (no joke, checked it 7 times)
#2 - 110 dry, 130 wet
#3 - 60 dry, 65 wet
#4 - 110 dry, 140 wet

Only thing I've done to the jeep since the first compression test was seafoam it and replace the plugs.

I even let it run until warm and checked number 1.. Still 10. I pulled the plug wire and started it, and it ran like I never even pulled the plug wire. The plug looked like this after I shut it off for the night

image-2398340453.jpg
Dripping gas.

The only thing I can think is that something happened in the head after I seafoamed it. The numbers point to the head as well for number 3.

The head will be coming off

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89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-05-2012, 07:51 PM   #137
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit, Michigan
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Not yet. Pull the valve cover first and check the valves lifters etc. first.
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Unread 11-05-2012, 08:13 PM   #138
schaef89
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Quote:
Originally Posted by Que89YJ
Not yet. Pull the valve cover first and check the valves lifters etc. first.
Have any advice on what to check? I know how they work just not good at diagnosing
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89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-05-2012, 08:27 PM   #139
Que89YJ
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1989 YJ Wrangler 
 
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As bad as you say it is it should be obvious. The valve will not be closing if it is a valve issue pull off the cover, remove the plugs and slowly turn the engine over with a wrench on the pully damper. Check the valves as it is turning. If it is a bad vavle it will be a broken spring or a bad valve either bent and not moving as much as the reset or a burned valve. You still might have a bad piston but you might luck out.
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Unread 11-06-2012, 07:17 PM   #140
schaef89
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Pulled the cover today. Found some white-ish stuff under the cover

image-261090902.jpg

I didn't see anything out of the ordinary. No bent pushrods or broken springs

image-1018726283.jpg


image-1906066707.jpg

I rotated it and watched the lifters and looked for valves to drop. I could see the intake valve come down but couldn't see the exhaust through the spark plug hole. Idk what else to do but pull the head and see for sure.

I did another comp test on that cylinder and got 15. I think it might be a burnt valve
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89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-06-2012, 09:52 PM   #141
Schaef81
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Seeing that you drive this thing....never...the white coloration in the oil could simply be condensation.
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Unread 11-07-2012, 09:19 AM   #142
Que89YJ
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The white is too small of an amount, its condensation. If you cycled the engine through 1 rotation and looked at the intake and exhaust valves on the cylinder that gave you the bad readings it sould be obvious if they were stuck open. You are looking strait at them as they push and release. That leaves either a bad valve or bad rings.
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Unread 11-07-2012, 09:35 AM   #143
schaef89
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lets just hope it's not the rings. I should be pulling the head on friday so we'll see what surprises my jeep has in store then.
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89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-09-2012, 06:04 PM   #144
schaef89
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Pulled the head tonight and found this at the start. Can't tell if its old or gas but it smells like gas

image-2090453533.jpg



image-1491652195.jpg

Cylinders 1-4 in order.

image-1595050936.jpg



image-1748793375.jpg



image-1007367004.jpg



image-1378832209.jpg

3 has a sunken valve if you look close and 1 looks fried

Cylinders bores look real smooth and found my pistons are .030 over

image-3003933582.jpg



image-2245698671.jpg

And the head is ready for the machine shop (once I find one)

image-3946493204.jpg
__________________
89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-09-2012, 06:34 PM   #145
jresch10
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What kind of bike is that?
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Unread 11-09-2012, 06:53 PM   #146
schaef89
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Location: Pittsburgh, PA
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It's my buddy's ninja
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89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-11-2012, 09:16 PM   #147
stmanser
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I have read the entire thread you have on here, and I have been enjoying the progress you made, and the documentation of the floor project.

I bought my 88 YJ from a friend for $100. He was going to give it to me for free, and i told him I had to give him something for it.

Well it is a project itself. The floors are in bad shape. I have welded in most of the passenger side floor already, but i need to finish it off, and there is some body cancer, and some frame rot that i have not tackled yet.


I just bought a new house with a garage, and it is in the middle of the garage, ready to be worked on, just need to find the time here and there to work on it.
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Unread 11-12-2012, 09:17 AM   #148
schaef89
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Quote:
Originally Posted by stmanser View Post
I have read the entire thread you have on here, and I have been enjoying the progress you made, and the documentation of the floor project.

I bought my 88 YJ from a friend for $100. He was going to give it to me for free, and i told him I had to give him something for it.

Well it is a project itself. The floors are in bad shape. I have welded in most of the passenger side floor already, but i need to finish it off, and there is some body cancer, and some frame rot that i have not tackled yet.


I just bought a new house with a garage, and it is in the middle of the garage, ready to be worked on, just need to find the time here and there to work on it.
Thank you sir! And congrats on getting your jeep.. seems you got a good deal regardless of throwing your friend a bill

I think i'm in the same boat as you about the jeep sitting around. I have a hard time juggling between jeep time and work a lot of the time actually
__________________
89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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Unread 11-14-2012, 04:28 PM   #149
stmanser
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i need to rip off the old fender flares and fix the rot around the typical places and try and finish the floor. i will be doing that this thanksgiving break, i just hope i have time, without having to do something else for someone else.

lol
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Unread 11-16-2012, 12:09 PM   #150
schaef89
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Location: Pittsburgh, PA
Posts: 846
Just dropped the head off at the machine shop. They said they should have it ready by next week
__________________
89 YJ S, 2.5L/AX-5/NP231
99 WJ Limited, 4.0L/42RE/NP247
93 YJ, 4.0L HO/32RH/NP231 - Sold
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