Bad oil leak!!!! - Mitsubishi Forum - Mitsubishi Enthusiast Forums


Mitsubishi Montero & Montero Sport This sport utility vehicle offers more size than the other Mitsubishi SUVs, but manages to keep a sporty look and comfortable feel, unlike many larger SUVs.

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Old 04-16-2018, 06:46 PM
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Default Bad oil leak!!!!

I recently did the timing belt on my 2002 Mitsubishi montero limited 3.5 with the 5 speed auto transmission, and now i have a bad oil leak. Like really bad.

I took it to Valvoline since i do not have a lift anymore to have the oil changed and so i could have a look under it. It was so hard to tell where its coming from but it looks like from the timing area.
It was litterly leaking while they were changing it.

It did not have this issue before i did the timing so i am wondering what i could've screwed up now. I have such a love hate relationship with this car.

I got the whole kit and replaced everything with he timing while i was doing it.
I changed the timing belt tensioner since it was making the lifter taping noise and someone told me it was the tensioner causing it but its still making the lifter tapping noise and now i have a horrid oil leak.

Is there something in the timing area that could cause this?
Anyone heard of this before?

Thanks guys.

JP
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Old 04-17-2018, 02:56 AM
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Quote:
Originally Posted by jp1985 View Post
I recently did the timing belt on my 2002 Mitsubishi montero limited 3.5 with the 5 speed auto transmission, and now i have a bad oil leak. Like really bad.

I took it to Valvoline since i do not have a lift anymore to have the oil changed and so i could have a look under it. It was so hard to tell where its coming from but it looks like from the timing area.
It was litterly leaking while they were changing it.

It did not have this issue before i did the timing so i am wondering what i could've screwed up now. I have such a love hate relationship with this car.

I got the whole kit and replaced everything with he timing while i was doing it.
I changed the timing belt tensioner since it was making the lifter taping noise and someone told me it was the tensioner causing it but its still making the lifter tapping noise and now i have a horrid oil leak.

Is there something in the timing area that could cause this?
Anyone heard of this before?

Thanks guys.

JP
If this engine is identical to the 3.0 6g72, you have some classic places.
First is the bolts that hold the tensioner. Treadseal on these two bolts should stop the leak there.
Camseals is also prone to leak.
Thats about it, AFAIK.
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Old 04-17-2018, 04:21 PM
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If it is coming form the timing belt area, there are three possibilities:
1. camshaft seals
2. crank shaft seal
3. oil pump

You will have to open up the timing belt covers to see what is going on. The oil pump is the one I'm least certain about. I believe it is bolted to the front of the engine where the crankshaft is. The crankshaft seal is actually mounted on the front plate of the oil pump. It is possible that one of the bolts that hold the oil pump were removed by mistake (not necessary for timing belt job) and not installed back correctly, or not torqued and that is what's causing the leak. I've seen a similar issue on the forum. Try searching for massive oil leak threads.
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Old 04-21-2018, 06:11 PM
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I tore it down today. The front cam seal looks ok but i am going to replace it anyhow since its torn apart and i ordered the part.

there was some residual oil sitting on it but i cleaned it off and it doesn't look like anymore is coming out. Or does it come out when engine is running?

I am Going to do the top two cam seals as well.
They look ok but the oil spill seems to be coming from the right somewhere so it doesn't hurt to replace them as well since i have it torn down and the part on order.

I really hope this fixes it. I want to drive again lol.

thank you for your help so far.

JP
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Old 04-21-2018, 06:13 PM
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Crank Seal Before Replacement.



Crank Seal Before Replacement.

It did also seem to come from the bolt that held the tensioner on when i was replacing the timing belt I remember thinking that seems like an odd amount of oil to be coming from there but did not do anything about it.
Could that cause a lot of oil to be flung out and leak badly?
So put some thread tape on the end of it when i put it back in and that will seal the oil leak if it is from the bolt?

As for it being the pump that could be a possibility but the oil seems to be coming from the top right cam shaft area. I dont think leaky valve gaskets could cause this big of a leak would it?

IDK still have some work to do i guess.
Seems its always something on this car.... I have a love hate relationship with it LOL.

Last edited by jp1985; 04-21-2018 at 06:19 PM.
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Old 04-21-2018, 07:15 PM
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For some reason t would not let me edit the last post above.
Do you think the noisy lifters could be caused by the oil pump going bad or leaking?

Itís always had that clicking/clanking noise. Thatís why I did a timing belt job on it people told me it was the tensioner but it was still making the noise when I drove it after the timing job. Oh and do you think the rough idol I was talking about in previous post could be caused by any of this ?
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Old 04-22-2018, 12:59 AM
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Noisy lifters can be caused by being low on oil at any point and sucking some air into the system. You have to run a lifter bleed procedure to see if it fixes it. Rough idle is not likely related to oil. It is hard to diagnose that remotely. Its best if you can hook up a scanner to the system and see what the fuel trim levels are and how they change with opening throttle. It seems like that is the whole another issue you need to deal with after you get the oil leak fixed.
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Old 04-22-2018, 10:10 PM
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Yes I will have to do that after i fix these seals.

The bottom and top left look ok, but like i said im replacing them all anyhow.
The top right looks like its a little soaked, and oil residual is back on the pulleys below them. I cleaned everything off so i could see and now its oily again so that leads me to believe its the top right seal.

I really hope it is.

Im tired of working on this thing. I need to be able to drive it LOL. Not being able to drive sucks.
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Old Yesterday, 04:11 PM
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Sorry i haven't gotten back to you guys sooner i have been sick these past few days.

So i went and opened the hood after the 2 days of being sick and i think i have narrowed it down to the cam shaft seal or the threading in the cam. I Cleaned it out thoroughly before the past 2 days and now there was more sitting oil.

either that or the top drivers side is leaking it and dropping it down onto the cam.
i hope it turns out to be just one of these seals.

Would it leak from there if it wasn't being run?

thanks guys
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Last edited by jp1985; Yesterday at 06:43 PM.
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