Turbo Failure? Boost Leak? Bad Gasket? WHAT THE HELL IS THIS SOUND?! - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-11-2006, 06:59 PM   #21
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Originally Posted by LunaticDriver View Post
so checked the shaft play and there is none in and out and back and forth and up and down is like zero you have it really push on it to make it move side to side or up and down even a tiny bit at all...
Umm... some shaft play is perfectly normal. Remember that that shaft is supported 360* with oil when operating. If there is no play then there is not enough clearance for the "oil bearing" to work properly and it will just wear down until there is. So, I recommend getting a dial indicator of sorts (harbor freight has a reasonable one for non-machinists for about $20) and measuring it for comparison to specs. I only trust the grab and wiggle method when performed by highly experienced turbo dudes (no just someone that has owned one).
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Old 11-11-2006, 09:52 PM   #22
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Ok the video is uploading now there will be a 20 meg version and a like 8 meg version and here are some photos of the turbo blades/whatever your fancy word for them is.

20 meg one
http://www.yousendit.com/transfer.ph...F85BEA145D5424

7 meg one
http://download.yousendit.com/DB05DD8333C6AAB5

you can hear the sound the best at times

0:48 - 0:50

1:03 - 1:08

1:13 - 1:19

1:37 - 1:44

1:48 - 1:55

2:25 - 2:30

2:50 - 2:55

3:00 - 3:05

3:21 - 3:25

after that is me just showing you cant hear it when at an idle or with a snap throttle test

*sorry for the bad camera stuff it was with my roomies digital camera*

also when it shows me doing the shaft play you can kinda hear a small click when the shaft moves... dunno if that helps or not...
Attached Images
File Type: jpg IMG_2331.jpg (53.8 KB, 21 views)
File Type: jpg IMG_2333.jpg (47.0 KB, 18 views)
File Type: jpg IMG_2334.jpg (89.7 KB, 20 views)
File Type: jpg IMG_2335.jpg (60.1 KB, 21 views)

Last edited by LunaticDriver; 11-11-2006 at 10:05 PM.
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Old 11-11-2006, 10:50 PM   #23
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maybe it's me but i don't hear anything
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Old 11-11-2006, 11:17 PM   #24
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me neither
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Old 11-12-2006, 12:45 AM   #25
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yeah it is pretty faint but if you listen really close you hear a sound that isnt exahust or normal turbo sound. Like a screeming/shrieking sound.

my roomie who has never heard the sound when i played him the video was able to hear it around 3:00 - 3:05 and is thinking bad gasket either Turbo to DP or Mani to Turbo
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Old 11-12-2006, 02:11 AM   #26
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it's not shrieking. I'd say it's nothing at all.
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Old 11-12-2006, 02:34 AM   #27
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it's not shrieking. I'd say it's nothing at all.
you did hear it tho right? would you check gaskets too or just say F it?
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Old 11-12-2006, 03:57 AM   #28
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Dude I don't think there's anything wrong. What I hear in the video is pretty normal, unless the noise is REALLY subtle.
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Old 11-12-2006, 04:07 AM   #29
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Dude I don't think there's anything wrong. What I hear in the video is pretty normal, unless the noise is REALLY subtle.
really subtle turn on the radio cant really hear it... no radio and you hear it well but the camera has shitty sound pick-up.
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Old 11-12-2006, 01:22 PM   #30
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it is exactly the same noise as mine , mine went after sanding the fins down abit (not adviseable) but the noise has came back genrally after talking to a marine technician he said he got the same noise on there turbos (dont ask what for i dont know) he said its when the bushes fail or when the bushes fail causing it to wear away the bushes housing in genral if it is not the bushes that has gone the turbo is on its way out
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Old 11-12-2006, 01:23 PM   #31
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if i get a sound recorder i will record and post mine might do it later actually
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Old 11-12-2006, 02:35 PM   #32
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im going to chalk it up to normal turbo whirling, not shrieking.
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Old 11-12-2006, 02:44 PM   #33
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im going to chalk it up to normal turbo whirling, not shrieking.
yeah going to get a dial indicator and messure the shaft freeplay if it is within spec then im going to say **** it and just keep my radio on. If it is out of spec then im going to send it back in hopes of a manufacturer defect.
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Old 11-12-2006, 11:07 PM   #34
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also for ***** and giggles where can i get a new Turbo -> DP Gasket and also get a Mani - > Turbo Gasket for the GReddy Flange TD04 15g?
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Old 11-13-2006, 09:57 AM   #35
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Don't use gaskets. I don't. FM and BEGi kits don't.
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Old 11-13-2006, 11:17 AM   #36
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I heard the sound faintly, sounds like you have a ghoul in your engine and you should most definitely get an exorcist.

I think its the turbo. how is your oil pressure? I ask because if you have low oil pressure it can screw a turbo up ... either way, see if you can find a turbo shop near you and take it in. From the video, i would say you have excessive shaft play, but this is coming from a guy with fairly little experience.
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Old 11-13-2006, 11:20 AM   #37
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I heard the sound faintly, sounds like you have a ghoul in your engine and you should most definitely get an exorcist.

I think its the turbo. how is your oil pressure? I ask because if you have low oil pressure it can screw a turbo up ... either way, see if you can find a turbo shop near you and take it in. From the video, i would say you have excessive shaft play, but this is coming from a guy with fairly little experience.
no turbo shops around... oil pressure is like 60 at start up on idle then 60-90 on driving till warm. once warm drops to 30 on idle and 30-60 on driving.
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Old 11-13-2006, 11:22 AM   #38
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Don't use gaskets. I don't. FM and BEGi kits don't.
Thats not necessarially true because we are talking about the $1200 greddy kit. The begi and fm kits have very well made manifolds and downpipes, i personally have a begi kit and can testify to this. Besides, the sound is definitely not a gasket leak, it follows the spool of the turbo and therefore i believe it is the turbo, or possibly the bov.
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Old 11-13-2006, 11:26 AM   #39
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no turbo shops around... oil pressure is like 60 at start up on idle then 60-90 on driving till warm. once warm drops to 30 on idle and 30-60 on driving.
That is good oil pressure and you seem smart enough to plumb your oil and water lines properly. Good luck, hopefully I have helped
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Old 11-13-2006, 05:21 PM   #40
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That is good oil pressure and you seem smart enough to plumb your oil and water lines properly. Good luck, hopefully I have helped
no water lines for teh GReddy =P but the oil return is to the pan and is always going downward. The oil feed is from the block to the turbo. Have pulled off the oil feed and there is oil getting to the turbo. So yeah... going to try and find another BOV to put on there (cut off my air baffle so cant really just take off the BOV) and see if that is the cause (very likely not) and on Friday taking it to class (am in a auto tech program) and going to change all the gaskets and also check the freeplay with a dial indicator.
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