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1G Loud drill like sound

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Gooeytaro

Proven Member
35
11
Aug 26, 2022
Silverdale, Washington
Turbo performance is normal, car doesn't produce any sort of smoke. Runs perfectly fine actually
I suspect the turbo but it doesn't quite sound like it is
It didn't do this yesterday and actually only started when I started it up this morning.
Images below for reference if maybe yall can see something I don't.
Keep in mind this is at idle, which is when the noise is also producing at.
Anyone else have this problem?

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This is a mechanical issue, those logs wont help us diagnose much. I suggest you try to take a nice video or just audio and post it up so we can hear. Move the camera around the engine bay so we can echo-locate where the noise is coming from roughly.

Most importantly confirm that you have adequate oil supply to the head. Do this by opening the oil cap (element 710) and look for a nice line of oil running across the rocker lobe.

Then, when the car is cold, remove the pre-turbo intake and feel the turbo's shaft for significant play both radially and axially. But I doubt it's that since you say it only makes the noise at idle, when the turbo isn't spinning remotely as fast.

Other things that can sound just like a drill are too tight belts, belts or pulleys rubbing against something (such as timing belt cover), or even air in the power steering pump, causing aeration and the inner pump veins making contact with the metal casing, producing a whirr like sound (horrible to hear).
 
I will post video in morning.
I have my timing belt cover off currently so it wouldn't be that, and do keep in mind it's possible im not hearing this noise under load because my engine could be drowning it out
 
Do you have straight-cut oil pump gears? Those can make a whine sound. Mitsu switched to the helical cut gears because people were complaining of the noise.
 
Do you have straight-cut oil pump gears? Those can make a whine sound. Mitsu switched to the helical cut gears because people were complaining of the noise.
I'm unsure but seeing as the noise has never happened before, I have a hard time believing it could be that

You can also try removing the accessory belts one at a time to see if it's the belt or its pulley..
Will try this as a plan B, after I send the video here in about 30 minute yall can tell me if it sounds like anything specific
 
Here's the best pic I can get of the inside of the turbo

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There is also smoke now coming from this section of the car as well.

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I'm unsure. Gave it a few listens, definitely comes from the timing belt area though that's for sure. Doesn't sound like a turbo chirp, nor does it sound like oil pump straight cut gears. Engine looks messy though, needs some cleaning and TLC for starters. You can try removing the belts one by one like Gary suggested and also spin the pulleys by hand and check them for play.
 
And as long as the turbo hose is off, wiggle that turbo shaft up/down, left/right, and in/out to check the play. Also does the blade touch the sides at all when you twist it and apply slight up/down, left/right force?
 
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Wiggle that turbo shaft up/down and left/right to check the play. Also does the blade touch the sides at all when you twist it and apply slight up/down, left/right force?
I was trying to move the blade and (shaft?) Shaft meaning the middle bit in between the blades? And I couldn't move anything other than spinning it
 
Yes you check the blades by moving the nut around up/down and left right. If no play or touching while turning then it's good.
Yeah as far as i could tell it wasn't moving at all. The smoke coming from around the o2 housing area maybe points to something else? The smoke from the exhaust and the noise in the bay could be completely unrelated??
 
Sorry don't hear it - maybe cause I'm old and ears aren't what they used to be. Guess I'd have to be there. If you get this (cheap) $12 stethoscope (https://www.oreillyauto.com/detail/...l-stethoscope/pfm0/w80582?q=stethoscope&pos=0) you can pin point noise sources accurately. Works fantastic on pulley and water pump bearings (or any bearing in a housing). If you don't need it now you will in the future with any car.

Another possibility is harmonic balancer (crank pulley) separation causing belt squeel. Often it occurs right at cold start up and goes away as it heats up (although if really bad it can squeel all the time). Usually it's louder though.
 
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