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Discussion Starter · #1 · (Edited)
2010 gsr 35,500 miles turbo sounds like siren updated with video

A little background:

at 34K miles my motor blew. The car was repaired underwarranty.

I noticed that even right before that event, I would notice a whining/siren type noise. The more I accelerated the louder and higher pitch the whine got. I dont remember this noise when the car was new. From my search i seems it could be the Journal bearing worn out due causing shaft play, or the events that led up to the blown motor caused debris to strike the vanes of the turbine.

I asked the dealer during the warranty process to inspect the turbine for any damage, and the technician told me the turbo was fine. I noticed this noise is really loud when the car is cold, it isnt so loud when its warmed up, but i can still hear it. I can barely hear it on deceleration.


Anyways my question is, how much downtime is a turbo replacement job? Since this is my daily driver I wanted to see what I would be looking at for a replacement in downtime. In addition, instead of using an OEM Replacement, can I run an FPGREEN Ball Bearing on the stock internals and block, while keeping the boost around stock levels? I know it seems pointless but if I have to replace it, a better turbo would make sense. Do I have to upgrade my fueling system if I run stock boost levels? the FP green would just deliver that targest boost easier than the stock? Pardon the n00b questions.
 

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If your just changing out your turbo for another one your downtime would be ~2-4 hours depending on your skills. If your having your stock turbo rebuilt the downtime will depend on the shop thats upgrading it and getting it back to you (could be a week could be over a month). FP Green should be able to be setup to run with the stock fuel system and is a great pairing with the stock block.
 

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If your motor popped, like mine did, I am literally stunned they did not replace the turbo. Were you having oil consumption issues too? My turbo was also incredibly loud (especially when cold). Cylinder 3 finally went kaboom.
 

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Check the for sale threads on here and evom. If you are looking to stay at stock boost you might as well try to find a stock turbo for cheap. I think they go for around $300.
Then when you decide you want to go bigger you can send your original turbo to FP or Chad to build it up.
 

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Turbo probably wasn't well-inspected when they told you that. Shouldn't be sounding like that, the way you describe it. Maybe check with them one more time if they would replace it under warranty? Otherwise like Malves said, pick one up for cheap. I'm sure a few people selling them right now in the For Sale section. I've got 2 extra turbos I'm gonna sell soon, just gathering everything first before I post it all up.
 

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Discussion Starter · #7 ·
i had David at South Side Performance take a look at it yesterday he told me after test driving it, that he is sure its the turbo. Now to try and get more warranty work.
 

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I'm just curious, what causes the motor to blow as a result of a bad turbo? Does the dying turbo have a tendency to over-boost or something?
 

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I'm just curious, what causes the motor to blow as a result of a bad turbo? Does the dying turbo have a tendency to over-boost or something?
By my logic, if the seals are blown internally you'll be pissing an appreciable amount of oil into the charged air going in to the motor. So not only are you running the motor low on oil, but you're contaminating the shit out of your fuel mixture with oil, therefore detonation.
 

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By my logic, if the seals are blown internally you'll be pissing an appreciable amount of oil into the charged air going in to the motor. So not only are you running the motor low on oil, but you're contaminating the shit out of your fuel mixture with oil, therefore detonation.
Ahh. Gottcha, that makes sense. Gracias
 

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Discussion Starter · #11 · (Edited)
i have the video here. I took it to two mitsu dealerships yesterday and the first one after saying they had a time available told me they didnt when i arrived onsite. I then went to the second one and they told me the noise is normal. I complained to Mitsu of north america about both dealers and am waiting on a reply from the case manager. The turbo is covered under the power train 60k mile warranty or 5 years and the tech tried to pull a line saying its only 3 yr 36k miles on the evos. i showed him the website for mitsu north america and the specific part about warranty for 60k miles on the evo.

He then told me the noise is normal and that he drives a ralliart and his makes the same noise and that all turbos whine. Not like this they dont. They spool which is a different noise. I am getting frustrated with this car. I just want to enjoy a turbo car i dont even care if it stays stock, i just want it to work normal.

Update: i noticed an oil leak this morning, a couple drops of oil on the floor, i will try to check under the hood today if possible to source the leak.

 

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motor blowing could have contaminated oil and junk could have gotten into the turbo bearing journal causing issue. Good luck.
 

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Maybe they will get to pay for not 1 but 2 new motors now! I thought they don't care about doing warranty work as they get paid either way. I've seen dealerships do warranty repairs that weren't even necessary (not Mitsu in my cases) just because they get paid to do them. Maybe I'm wrong though.

I'll go ask my buddy at the Mitsu dealership 5 mins from me next day I have off...if the wife doesn't give me another 25 errands more than one can complete in a single day..
 

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By my logic, if the seals are blown internally you'll be pissing an appreciable amount of oil into the charged air going in to the motor. So not only are you running the motor low on oil, but you're contaminating the shit out of your fuel mixture with oil, therefore detonation.
You would need to completely fill up the charge cooler with liquid oil before any of it will even get to the intake manifold.
 

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You would need to completely fill up the charge cooler with liquid oil before any of it will even get to the intake manifold.
True.

The only danger from oil getting into your IC piping is that it will coat the inside of the IC and act as an insulator. Raising charge temps. Probably about as much as painting or anodizing the IC.

OP, mine sounded like that when I had a huge boost leak a while back.
 

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Just watched your video, I would safely say 100% that is shaft play and I've had this happen to me at round about the same mileage too.

You will need to change the turbo or get that one repaired or upgraded.

I don't know if it's related to the blown motor? and I dont think it would have caused the blown motor either unless its leaking a considerable amount of oil.

I driven round for about 3 months with the siren untill I got the turbo swapped and my motor was/is still fine.

I think its x2 separate issues IMO, and I think the turbo is only covered under the 3year or 36k mile warranty. I would push to get a new one from Mitsi, it is an engine component after all.
 

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Discussion Starter · #17 ·
so after taking it back to the dealer who did the original repair work before, they have confirmed the turbo is making a noise and it needs attention.

Also they told me they check the shaft for any play and it was still "normal" just making a noise from the bearing, not sure if this is a possibility or not.

I also found out that the turbo charger is covered under the power train warranty, for 5 years 60k miles. The 3 years 36k miles is bumper to bumper warranty. Im glad the power train goes for longer.
 

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Discussion Starter · #19 ·
turbo was replaced under power train warranty. Im happy to have the car back after so many roadblocks along the way. I dunno if its just a placebo effect but the car feels much more responsive than before, although its stock so it is still slow compared to what it was before. I have to say lewisville mitsubishi, tx was top notch on their service.

I did have to get a rental car, and i purchased an extended warranty from costco which covers everything on the car except fluids tires clutches and brakes. They paid for my rental car which solved the downtime issue.

I highly recommend this for people who daily drive as their only car.
 
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