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.

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

Tighten your wastegate actuator rod until it doesn't rattle.

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.

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.

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.

Oil Pressure Sending Unit port?

are you boosting into your valve cover?

You bet your ass 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.

That is some JDM shit right there.

haha a coldside turbo

what problems might he have caused by boosting the valve cover?

Lol. The fisheye setting on this thing is retarded.

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 shit a ton of bricks if I get home tonight and find that now I have to pull the motor out.

nothing really more than just a mess in the engine bay when things like the oil dipstick pop out and leak oil everywhere.