TWO wierd sounds from turbo....
#1
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TWO wierd sounds from turbo....
I have some sounds that are coming from my turbo that I cant diagnose the source of. Maybe some of you guys have heard them before and fixed the problem.
Sound 1- Began after the instal of a JR high flow cat. Sounds like when you blow through a cardboard paper towel roll. Begins shortly after reaching boost and is louder then the spool of the turbine.
Sound 2- Begins when the turbo starts to spool but goes away when boosts hits at higher rpms. Arrived after the tightening of the wastegate actuator rod. sounds like a rattlesnakes tail. I have a feeling this one is the rod bouncing back between the side of the wastegate and the pin.
Any idea's? I would like to figure it out before NE dyno day on sat although I dont feel any deliverance in performance, its anoying and sounds broken.
Thanks,
7
Sound 1- Began after the instal of a JR high flow cat. Sounds like when you blow through a cardboard paper towel roll. Begins shortly after reaching boost and is louder then the spool of the turbine.
Sound 2- Begins when the turbo starts to spool but goes away when boosts hits at higher rpms. Arrived after the tightening of the wastegate actuator rod. sounds like a rattlesnakes tail. I have a feeling this one is the rod bouncing back between the side of the wastegate and the pin.
Any idea's? I would like to figure it out before NE dyno day on sat although I dont feel any deliverance in performance, its anoying and sounds broken.
Thanks,
7
#2
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My guesses
#1 I don't understand what you mean, I can't recall ever blowing into a cardboard tube
#2 downpipe rattling against tranny or WG actuator rod end rattling between WG lever and cotter pin. I had both problems. The first I fixed when I put the tranny back in after the clutch. The second I removed the cotter pin and replaced it with a bent finishing nail.
#1 I don't understand what you mean, I can't recall ever blowing into a cardboard tube
#2 downpipe rattling against tranny or WG actuator rod end rattling between WG lever and cotter pin. I had both problems. The first I fixed when I put the tranny back in after the clutch. The second I removed the cotter pin and replaced it with a bent finishing nail.
#7
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listen to mine, it doesnt sound like that does it? if so that's normal boost in the making....
http://youtube.com/watch?v=IxSSi80Lv8s
http://youtube.com/watch?v=IxSSi80Lv8s
#12
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It was doing it at the time. Remember what we thought was the wastegate rattling or something because of the bigger cat? I tightened it all the way and its still there. I might switch the cat out tomorrow with the stocker and see if the JR cat is bad. Maybe its has a leak but i dont see why it would make that noise. Other then that I'm stumped.
#14
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So i might have found the problem. The shaft in the turbo has a ever so slight of play in it. Is that normal or is it not supost to move. Can i fix it or does it need to be rebuilt? basically whats my next step?
Would the turbo make sounds like this if it was oil deprived? I dont have the oil return drilled so there might be a kink in it?
Would the turbo make sounds like this if it was oil deprived? I dont have the oil return drilled so there might be a kink in it?
#15
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most turbos ARE supposed to have a tiny bit of play until the oil gets in the bearings, then its supposed to seal up from what I understand...
But I don't understand that much so IDK.
But I don't understand that much so IDK.
#16
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when you're turbo has enough play that the compressor blades hit the walls, it sounds like this: https://www.miataturbo.net/braineack...s/badspool.wmv
I really don't think it's the turbo per-say...
every needs to listen between 11 - 17secs., dont listen to the exhaust or the turbo spool...you'll hear a crazy rattling....then you can here it on the rest of the clips.
I really don't think it's the turbo per-say...
every needs to listen between 11 - 17secs., dont listen to the exhaust or the turbo spool...you'll hear a crazy rattling....then you can here it on the rest of the clips.
#18
The shaft should have some play up, down, side-to-side (axial/radial) but not back and forth (lateral). The axial movement accounts for the space the oil film will take up, lateral movement just means **** (the thrust bearing) is worn out and the compressor wheel will eventually hit the inside of the housing, if it hasn't already.
#20
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http://www.voodooboost.com/
Checked the oil return and feed and no kinks. Oil level is fine and i guess the play in the shaft is normal. Do you guys really think the noise could be from an exhaust leak?
Checked the oil return and feed and no kinks. Oil level is fine and i guess the play in the shaft is normal. Do you guys really think the noise could be from an exhaust leak?
Last edited by that7guy; 05-10-2007 at 02:00 PM.