My 1989 4 banger just blew up - JeepForum.com

 
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post #1 of 12 Old 12-03-2009, 05:09 AM Thread Starter
Thunder Head
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1989 YJ Wrangler 
 
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Location: Georgia
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My 1989 4 banger just blew up (pic added)

Hey guys,
My jeep lost power and quit on the way to work the other day. Pulled out the spark plugs to make sure i ws getting fire. They looked pretty bad so i put a new set of plugs and wires on. While trying to start the engine my vavle cover exploded into several pieces. I am assuming this means i have cylinder problems and the back pressure caused this. I am not a mechanical genius so i am not real sure. What do yall think?

Also, keeping in mind i dont know alot about engines. How hard is it to replace my 4 cyl. with a 6cyl.


Last edited by Thunder Head; 12-04-2009 at 08:07 AM.
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post #2 of 12 Old 12-03-2009, 05:14 AM
rompinthewoods
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1995 YJ Wrangler 
 
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It is difficult to do for someone that knows about engines. From what you posted above, I would part it out and buy one with the 6 cyl or pay a mechanic to do it. But then again, it may be a good learning experience. I would use the search function on the homepage and find someone that has done it. Look at their process and see if it's something you can tackle.

If I have to drill out another bolt, I'm just going to start welding parts on.
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post #3 of 12 Old 12-03-2009, 10:00 AM
jeepnmike
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Just swap in another 4 banger. It will be A LOT easier and cheaper.

'95 YJ- 1.25" BL, 31" bfg's, black cragars, herc'd tub. sold
'99 TJ Sport- 35's, 8.8, 4.88s, 5" RC LA, JB SS SYE, UFC TT, HD steering
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post #4 of 12 Old 12-03-2009, 01:18 PM Thread Starter
Thunder Head
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Whats my best option for a new motor?
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post #5 of 12 Old 12-03-2009, 01:33 PM
jeepnmike
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Quote:
Originally Posted by Thunder Head View Post
Whats my best option for a new motor?
As far as a reman'd 4 banger?? I don't know much about remans but I haven't heard a lot of bad stuff about Jaspers.

'95 YJ- 1.25" BL, 31" bfg's, black cragars, herc'd tub. sold
'99 TJ Sport- 35's, 8.8, 4.88s, 5" RC LA, JB SS SYE, UFC TT, HD steering
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post #6 of 12 Old 12-03-2009, 02:01 PM
oteps
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I have a jasper engine and tranny in my truck, 140,000 miles on the engine 120,000 on the tranny. And its a dodge auto with a lot of towing. I am starting to have some problems with the tranny now.
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post #7 of 12 Old 12-04-2009, 08:06 AM Thread Starter
Thunder Head
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Any idea how the valve cover blew up?

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post #8 of 12 Old 12-04-2009, 08:42 AM
1998zj
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Wow that engine has been neglected during its miserable life.

"Our lady of blessed acceleration don't fail me now"
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post #9 of 12 Old 12-04-2009, 09:18 AM
WJ-matt
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the only thing i can come up with is a cloged pcv valve or an actual lifter/valve stuck and the presure just kept on building untill the valve cover blew up. How long have you had this jeep, and what kind of serveces have you done too it ? only reason i ask is the oil looks like sludge in thier. When was the last oil change done? and who did it?

- http://www.jeepforum.com/forum/f197/wj-matt-build-1459459/
- Dude i think i know what your noise is...your jeep is telling me i need a beer....and your gonna need a bigger wallet.
- www.rcoverload.com
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post #10 of 12 Old 12-04-2009, 01:07 PM Thread Starter
Thunder Head
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I have put about 30 thousand miles on it since i got it. Its was up to 169,000. I was surprised at how dirty it was under the cover too. I service all my vehicles at around 3,000 miles. I replaced the pvc valve 6-7,000 miles ago because it was stopped up.

I havent done anything to the outside of the engine because i havent got there yet. It usless to clean it. Too much oil coming out around PVC valve. Kinda been waiting on it to die. It had a compresion problem in the #2 cylinder already.
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post #11 of 12 Old 12-06-2009, 10:35 AM
Geardo
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That is one nasty engine
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post #12 of 12 Old 12-06-2009, 04:25 PM
buzziegee
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Fuel in the crankcase,,little spark,,,big boom,,god-damn dirty motor...remans are all good, used to build them myself ,,just not for Jasper..go to a local Automotive Machine shop and get some advice on your options...Buzziegee
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