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Old 09-09-2010, 06:17 PM   #1
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Oil leak problem on 2.5L

Hey guys! I know i'm a noob to this forum but i've been searching for the last couple hours and have read dozens of threads so i just want to make sure i have this right before going forward with the project...

As some read my first post, i have an oil leak in my 99 Wrangler 2.5L. After searching awhile, i first thought it was the RMS so i had the jeep dealer look at it (free) and make sure with me...they said they were 80% sure it was coming for the intake and just dripping down over the rear main. So, i had them order a head set for me at cost which should be here in a couple days. Anyway, i'm not bad with mechanics or anything but i'm terrible with names of things haha. So my question is, by an "intake leak" does he mean the head gasket? And if so, what kind of project am I in for?

I've read a few other threads and posts from various places and with the 2.5L i understand that i pretty much just need to remove the airbox and stuff around it and i'll be able to lift the intake off, clean the gasket up, clean everything up nice, then replace in reverse order?

Any help or a link to a how-to would be much appreciated...again, sorry for bein a noob on the forum!

Thanks again

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Old 09-09-2010, 07:59 PM   #2
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anyone?

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Old 09-09-2010, 10:05 PM   #3
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Mine does the same thing got a less viscous oil it reduces pressure and it dosent leak as bad.
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Old 09-09-2010, 10:41 PM   #4
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I'm gonna be changing to a full synthetic oil which should help but i also ordered a head kit (got it at cost) which i'll do myself unless someone advises me not too...

hopefully get this done soon though! Hate havin this leak...
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Old 09-09-2010, 10:46 PM   #5
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Youve got it right mine is a 94 but i think they are similar. U just have to remove the airbox and seperate the throttle cable from the body and unplug a few sensors and lines just make sure you document what goes where or if you have a chiltons manual it will help. Then undo the intake manifold bolts and on mine the power steering pump is hooked to the intake manifold aswell idk of yours is.... Then remove the gasket clean and replace. Hope this helps.
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Old 09-10-2010, 03:28 AM   #6
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Quote:
Originally Posted by Owen_TJ
I'm gonna be changing to a full synthetic oil which should help but i also ordered a head kit (got it at cost) which i'll do myself unless someone advises me not too...

hopefully get this done soon though! Hate havin this leak...
When you change your oil typicly there is a little leftover old oil that mixes with the new, this is normal and perfectly fine but when mixing a mineral based oil and a full synthetic they dont fully mix due to the Polyglycols in the synthetic. But if you went to a partial synethic oil it would mix just fine do to the fact that partial synethics are equal parts mineral and Polyglycols. I have also heard if you switch to a synthetic oil after running a mineral oil for the life of your engine that the synethic may break up mineral deposits left in your cylinders or in the block and they will basicly just be sitting in your engine now.
As for changing the head gasket it just depends on your knowlege and comfortabilty around your engine and also your resources/tools ect. You have to do all of what i stated below aswell as the rockers/ pushrods head bolts and then the head. Taking it apart is the easy part its getting it back together that can be difficult everything must be assembled to spec and proper torq. And if you dont have a resorce for this info it could be difficult.
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Old 09-10-2010, 05:02 PM   #7
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Quote:
Originally Posted by H2_recoveryteam View Post
Youve got it right mine is a 94 but i think they are similar. U just have to remove the airbox and seperate the throttle cable from the body and unplug a few sensors and lines just make sure you document what goes where or if you have a chiltons manual it will help. Then undo the intake manifold bolts and on mine the power steering pump is hooked to the intake manifold aswell idk of yours is.... Then remove the gasket clean and replace. Hope this helps.
Quote:
Originally Posted by H2_recoveryteam View Post
When you change your oil typicly there is a little leftover old oil that mixes with the new, this is normal and perfectly fine but when mixing a mineral based oil and a full synthetic they dont fully mix due to the Polyglycols in the synthetic. But if you went to a partial synethic oil it would mix just fine do to the fact that partial synethics are equal parts mineral and Polyglycols. I have also heard if you switch to a synthetic oil after running a mineral oil for the life of your engine that the synethic may break up mineral deposits left in your cylinders or in the block and they will basicly just be sitting in your engine now.
As for changing the head gasket it just depends on your knowlege and comfortabilty around your engine and also your resources/tools ect. You have to do all of what i stated below aswell as the rockers/ pushrods head bolts and then the head. Taking it apart is the easy part its getting it back together that can be difficult everything must be assembled to spec and proper torq. And if you dont have a resorce for this info it could be difficult.

Thank you very much for the replies...i feel comfortable enough to do it, but to be on the safe side i'm going to have a friend of mine do it that works in a Ford service dept for around 100 bucks. For me, it's worth it sicne there wont be any "hmm, where did this go" or anything like that...plus he'll get it done a hell of a lot quicker than i would haha

And you're correct about the oil...i've read all you stated!
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Old 09-10-2010, 09:27 PM   #8
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Yea that would prob be the best an fastest soulution anyway. Well goodluck an enjoy jeepin.
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Old 09-14-2010, 05:21 PM   #9
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Sorry to bump my thread, but just figured i'd update with a few pictures of the leak...i noticed it was overfilled with oil the other day (not my doing) so i drained some oil out and its gotten slightly better but didnt solve the problem (didnt think it would).

Looks to be coming down the transmission...

Any guesses as to what is leaking or would you second the head gasket...

thanks!

Driver side...


Cable under driver side connecting to tranny


Top of the tranny (picture facing motor)


Passenger side


Passenger side again
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Old 09-14-2010, 06:05 PM   #10
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Again, sorry for the bump...

But i opened the hood and took a look from the top and it looks like its comin from the back of the motor near the valve cover/head gasket area so hopefully the head kit will do the trick...

If anyone has any ideas, please feel free to shoot em out!

Otherwise, i'll update when i get the head kit installed...wont get the kit for a week or so
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Old 10-02-2010, 08:50 PM   #11
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Figured I'd bump this to the top for an update...

After telling the jeep dealer that i figured the RMS was my problem and them telling me it was the head gasket, i went with them and was gonna do the head. Got things goin on it today and after getting down into the motor, theres no oil coming from the head. Went into it a bit more and like i thought its a RMS leak (fckin idiots) so i returned the head kit and am going to do the RMS when i have a little time set aside to do it. I'll update again after i change the seal to see how things go!

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