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Old 01-09-2008, 01:50 PM   #1
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Default Scary sound after Greddy install

A friend and I installed a Greddy kit, with no other modifications than some tan 1.8 injectors. Everything seemed to go okay, but when I took it out for a very gentle test drive, I heard a weird noise. It sounds a lot like a resonant rattle, like the loose heat shield that I clipped, except it's higher pitch and isn't so frequency-specific... I only hear it when boost starts to fall, kind of like if I had a bypass or blowoff installed. It doesn't sound like air, but it happens at times when I'd expect to hear a BOV if I had one.

I've been super gentle with it so far and parked it after I heard the noise. Could it be the oil feed wasn't done quite right, or would the turbo be making a terrible racket if it wasn't getting enough oil? The oil return is wet, so it's at least getting some.
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Old 01-09-2008, 02:00 PM   #2
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does it kind of sound like a fluttering sound like possibly compressor surge mine made that until i replaced the plastic intake pipe with the intercooler pipes?? just my .02 cents
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Old 01-09-2008, 02:02 PM   #3
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Tighten your wastegate actuator rod until it doesn't rattle.
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Old 01-09-2008, 02:44 PM   #4
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ITs your wastegate actuator rod 100% sure. If Its a buzzing sound on deceleration that has to be it. That drove me crazy after I Installed the Greddy on my car until I figured out how to get rid of it.
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Old 01-09-2008, 04:19 PM   #5
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does it kind of sound like a fluttering sound like possibly compressor surge mine made that until i replaced the plastic intake pipe with the intercooler pipes?? just my .02 cents
No, it's not compressor surge -- I know what that sounds like. The crappy BOV that FM sold in their MSM kit was too tight and gave me all kinds of surge.


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Tighten your wastegate actuator rod until it doesn't rattle.
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ITs your wastegate actuator rod 100% sure. If Its a buzzing sound on deceleration that has to be it. That drove me crazy after I Installed the Greddy on my car until I figured out how to get rid of it.
I was hoping that would be it! I saw it mentioned in some searches, but I figured it would only make noise if the wastegate actually had to open... as in reaching a few pounds of boost. I'll check this out when I get home this weekend. Thanks.
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Old 01-09-2008, 07:04 PM   #6
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No, it's not compressor surge -- I know what that sounds like. The crappy BOV that FM sold in their MSM kit was too tight and gave me all kinds of surge.






I was hoping that would be it! I saw it mentioned in some searches, but I figured it would only make noise if the wastegate actually had to open... as in reaching a few pounds of boost. I'll check this out when I get home this weekend. Thanks.
Mine only rattled on decel until I snugged it down. I'd bet that's the issue.
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Old 02-12-2008, 09:23 PM   #7
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I must have grabbed the wrong two metal pieces, because I just bent the connector between the rod and the turbo out, away from the turbo. I was watching the can side to make sure the rod itself didn't turn. Wtf.

It's the least of my worries, though. I have a new oil leak that I thought was the CAS o-ring or valve cover gasket. I replaced both, and it seems like oil is spraying up, from the back side of the engine. Not a huge amount, and not until the motor gets hot.
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Old 02-12-2008, 09:57 PM   #8
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Oil Pressure Sending Unit port?
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Old 02-13-2008, 12:38 AM   #9
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It's the least of my worries, though. I have a new oil leak that I thought was the CAS o-ring or valve cover gasket. I replaced both, and it seems like oil is spraying up, from the back side of the engine. Not a huge amount, and not until the motor gets hot.

are you boosting into your valve cover?
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Old 02-13-2008, 05:30 AM   #10
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are you boosting into your valve cover?
You bet your *** I am! +5 hp right there!

I should have read your post before going back out for another test drive. I paced until I noticed that I never replumbed that god damn hose. My Home Depot intake doesn't have the nipple like the greddy piece. Hope I didn't break anything.
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Old 02-13-2008, 06:06 AM   #11
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That is some JDM **** right there.
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Old 02-13-2008, 11:20 AM   #12
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haha a coldside turbo
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Old 02-13-2008, 12:40 PM   #13
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what problems might he have caused by boosting the valve cover?
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Old 02-13-2008, 02:17 PM   #14
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haha a coldside turbo
Lol. The fisheye setting on this thing is retarded.

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what problems might he have caused by boosting the valve cover?
So some people tap their oil pans while on the car, and they blow a little compressed air into the oil hole to help the shavings make their way out. I know someone said not to use any more than 10 psi or you'd 'blow the oil seals out' or something, but I don't have a clear picture of how the different oil thoroughfares are connected. I'm going to **** a ton of bricks if I get home tonight and find that now I have to pull the motor out.
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Old 02-13-2008, 02:47 PM   #15
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what problems might he have caused by boosting the valve cover?
nothing really more than just a mess in the engine bay when things like the oil dipstick pop out and leak oil everywhere.
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