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2000 Mitsubishi Montero Sport - Knocking Noise


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pulpfiction21
Novice

Mar 11, 2009, 3:32 PM

Post #1 of 22 (10471 views)
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  post locked   2000 Mitsubishi Montero Sport - Knocking Noise  

Okay so I have a 2000 Mitsubishi Montero Sport XLS. 3.0 L V6. Bought it with 96,000 miles and it currently has 153,000.

I know there are several possibilities as to what is causing my engine to make noise, so I will go into some detail as to help narrow it down.

Almost every time my motor is cold (but especially in the morning) when I start my engine, it will roar with a clicking or knocking sound. And by roar, I literally mean it. Sometimes it sounds so loud I am afraid it will wake up all my neighbors in my apartment complex. But sometimes it isn't as bad. There are even times when it doesn't even make the initial loud roar.

Up until recently, the idle would rev up to around 1500 for about 30 seconds and then start slowly going down. If I just let my car sit there and warm up, it would take about 6 minutes before the noise was no longer audible. If I would slowly rev up the engine for a little while, the noise will get louder as i am doing it, but the noise will be gone in less than 6 minutes. In other words, it would make this noise until it it completely warmed up.

I have owned the car for almost 4 years and it has done this since I have owned it.

However, for the past 3 or 4 weeks, the knocking never completely goes away. I will be sitting at a red light and I can hear the knocking still going on. Typically if this used to happen, it would just mean that I had let my oil get low and I would just add some in, problem fixed. But now the oil is fine and it still knocks.

I have never been too concerned with it cause my dad has always said that it is a bent rod and I couldn't afford to fix. So I have just lived with it. I never used to drive it until the noise had gone away, so it has kinda put a burden on me cause I am always sitting in my car waiting. I have finally decided to look into this problem and see if I can do anything to fix it or if it really is a bent rod and can't do anything but go get it fixed at a dealership.

I have also read on the internet about it possibly being a Cam Belt Tensioner problem. If anyone could possibly verify this or just give various other explanations. I think the key piece of info for narrowing down what could be causing this is that it has made this noise for almost 4 years and hasnt gotten much worse up until recently.

Any quality information will be much appreciated. Ask me any questions that might help. Thanks.


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 11, 2009, 9:04 PM

Post #2 of 22 (10456 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

This is really tough, since we can't hear the noise. The lifters on the 3.0 Mitsu engines are a common cause of a loud clicking noise. I would think that if it were a rod, Lucille would have left you long ago. I'd recommend taking it to a reliable shop, leaving it overnight so they can hear it when cold, then go from there.
Loren
SW Washington


pulpfiction21
Novice

Mar 12, 2009, 7:56 AM

Post #3 of 22 (10451 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Okay so that is the first time I have been told that lifters could be the problem. Let's say it is the lifters, would that fit with most of the symptoms that have been occurring?

And if it is the lifters, what kinda cost would i be looking at? Ballpark me if you would.

Even if you dont answer this, thanks for the first reply.


pulpfiction21
Novice

Mar 12, 2009, 4:44 PM

Post #4 of 22 (10442 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

I made a video of my engine: It didnt make the loud start up noise cause i had already driven it today, but it had been sitting for about 5 hours so it was cold. You hear the noise the best at around 1:15 to 1:45 in the video.

http://www.youtube.com/watch?v=IjDIUVeTglA


If this doesnt help enough, i will film it again in the morning when I first start it and see if i can get the original roar of the motor on film.


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 12, 2009, 7:38 PM

Post #5 of 22 (10435 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

pulpfiction; That was awesome! I've never had anyone be able to do that, before. Well, I'd say we can rule out lifters.Unsure I would have all of the pulleys, up front, including the water pump itself, checked. Could have the noise coming from the timing belt area, as well. You have checked the oil, right? I think we can rule out rod/main bearings, as well. Not that kind of noise. Remove the serpentine drive belt, start the engine, and see if the noise goes away. If not, use an automotive stethescope to try and find it's origin. Good luck, and great job with the video.Smile
Loren
SW Washington


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 12, 2009, 7:56 PM

Post #6 of 22 (10433 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Ditto - that was excellent! It's still a pest to tell and might be if right thereCrazy

Totally agree with Loren that trying this with belt off for a short time would be helpful. Spin the pulleys by hand - engine on cool side. No burns please.

BTW - the temp gauge reads cold on the video. Does this change cold to warm - better or worse?

T
_________________________________________
Long retired now


pulpfiction21
Novice

Mar 12, 2009, 9:22 PM

Post #7 of 22 (10428 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

okay well i had the timing belt and water pump replaced about 1 1/2 years ago, like 18,000 miles ago. This problem has been around way longer then that though. Yes i have checked the oil, i check it very frequently. I will film this again tomorrow morning when i start it and you will get to hear the noise better. I'm not sure if you were able to get a great feel for the noise in that video.

The temp gauge does work fine, it was only cold in the video because the engine was cold. It takes about 5 minutes till the dial will get to the middle of the gauge. Even when the car is warm, the noise is still there. It will typically go away while driving when i hit about 1100-1300rpm.

Once again thanks for your guys help, i will post the other video tomorrow and maybe that will help diagnose the problem.


pulpfiction21
Novice

Mar 13, 2009, 8:03 AM

Post #8 of 22 (10422 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Okay so this is a video from this morning. I started recording just after i had started it. At about the :04 mark or so you should hear the loud rattling sound that sounds absolutely horrible. The rattling noise dies off at the 1:30 mark. This is the noise that it typically makes after sitting all night. This noise does not stay with the car while i am driving. Like i said it will die off after a little bit and then its just the "knocking" noise. So after it dies off, you should start being able to hear the "knocking" noise much better. I am not revving the engine in this video, i never once put my foot on the gas, the rpm is at 1300 - 1500 because thats what it stays at when it first starts for at least 2 to 3 minutes.

http://www.youtube.com/watch?v=ONSGe3enR5U

Sorry for the poor lighting, it was still dark out.

Please tell me what yall think about the noises now.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 13, 2009, 8:35 AM

Post #9 of 22 (10421 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

It kinda sounds like a metal to metal noise that might be something loose + heat related. With that I suggest getting a rubber hammer and tap on exhaust item in particular starting with underhood items. Do this when stone cold as it seems worse then too. Don't be tapping on any electrical plugs or wiring.

I'm not so concerned with idle speeds just yet as the engine was cold.

Common exhaust noise makers:
* Heat shields
* Any bolts or clamps
* Hangers
* Item that touch and shouldn't!

T
_________________________________________
Long retired now


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 13, 2009, 6:36 PM

Post #10 of 22 (10412 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Pretty darned sure that it isn't lifters. <sigh> You know, it's starting to sound more like a water pump bearing, to me. Grab the fan (preferably with the engine offSmile) and see if you have any front to rear movement. (assuming it's not an electric fan) I think the next step would be to take the serpentine belt off, start the engine, and see if the noise is gone. That is one ugly noise!
Loren
SW Washington


pulpfiction21
Novice

Mar 15, 2009, 9:51 AM

Post #11 of 22 (10405 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

I'll probably take the belt off on monday, but could you please describe how the belt could be causing the "knocking" sound?


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 15, 2009, 11:32 AM

Post #12 of 22 (10402 views)
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I'm wondering if you may have a pulley bearing going bad; Possibly water pump. Once the belt is off, you can inspect each pulley for roughness or excessive play. If the noise is still there after you start the engine (with the belt off) then you have eliminated everything that the belt turns. If the noise is gone, with the belt off, then you know it is, at least, one of the items that it turns.
Loren
SW Washington


pulpfiction21
Novice

Mar 15, 2009, 2:37 PM

Post #13 of 22 (10401 views)
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okay and if it were a pulley bearing going bad that is making the noise, it could have been going bad for the past 4 years and never have completely gone out yet?


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 15, 2009, 6:46 PM

Post #14 of 22 (10396 views)
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It's been making this same noise for four years?????? You gotta be kidding??Pirate
Loren
SW Washington


pulpfiction21
Novice

Mar 15, 2009, 8:13 PM

Post #15 of 22 (10393 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

No im not kidding. ha.

From OP:

"I have owned the car for almost 4 years and it has done this since I have owned it. "

and

"I think the key piece of info for narrowing down what could be causing this is that it has made this noise for almost 4 years and hasnt gotten much worse up until recently."


This is why i have a hard time trying to solve what the problem could possibly be. It may have gotten a slight bit worse progressively over those 4 years, but it wasnt until the past month that it has started "knocking"/ "ticking" even after the engine has warmed up. Cuz before it would only make that noise until it warmed up.

Any new thoughts of what it could be?


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 15, 2009, 8:36 PM

Post #16 of 22 (10390 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Well, the lifters could be adding to the original noise(or vise-versa), but I think the time for guessing and procrastinating is over.Unsure
Loren
SW Washington


pulpfiction21
Novice

Mar 15, 2009, 9:15 PM

Post #17 of 22 (10389 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Yeah i know. Im taking it in tomorrow. I was just trying to see if anyone could give me an answer, and maybe it would be something that i could fix myself. And I was hoping someone would know what it was so that if the mechanic tried telling me it was something else, i would know.

Thanks for all your help though. I'm going to guess that it is the lifters, cuz after some research online, that seems to be common with my car. And after listening closely today, it sounds like there is a "ticking" sound coming from right under the intake manifold.


Oh one last question though. If it turns out to be lifters, will it ruin my engine if i dont get them replaced? I am asking because i hear it will cost over $1000 easy, money i do not have now. And since my car has been okay with the noise for the past 4 years, im just hoping that it will continue to be okay, but just have a "ticking" noise.


Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 15, 2009, 9:25 PM

Post #18 of 22 (10387 views)
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From what I heard on your video, I'll be surprised if it's just the lifters.Unsure And, yes, you need to have them replaced, if that's what is causing the clatter. You've been very lucky for it to have lasted this long.
Loren
SW Washington


brenes23
New User

Jul 29, 2010, 11:11 PM

Post #19 of 22 (10169 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Did you ever get the problem fixed? I have the same problem with my Montero and was looking for you to post what you found out when you took it to the shop. Thanks


mercurybds
New User

Nov 5, 2012, 1:19 PM

Post #20 of 22 (6250 views)
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Hi Pulpfiction,

Did you ever learn what the problem was? I've got this exact same problem, right down to every little detail.

Until recently it was just a cold-weather nuisance for the first few minutes until the car warmed up. Now the clicking/rattling noise is there pretty much all the time.

Any help would be appreciated!


mercurybds
New User

Nov 5, 2012, 1:22 PM

Post #21 of 22 (6247 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

Hi Brenes23,

Did you ever learn what the problem was? I've got the exact same problem as Pulpfiction21 described right down to every little detail.

Any help would be appreciated!


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 5, 2012, 2:53 PM

Post #22 of 22 (6245 views)
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  post locked   Re: 2000 Mitsubishi Montero Sport - Knocking Noise [In reply to]  

This thread started......
Mar 11, 2009, 3:32 PM

Enough already! This is open web so if you want to chat with someone that long ago see if they can accept a private message or start your own please. Locking thread as it clogs in boxes of those who wanted a notice of a reply made,

T
_________________________________________
Long retired now




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