Help!


On Tuesday I headed over to MPJ motorsports to purchase/install a helix uppipe/downpipe combo for a really dope price (btw much respect to mpj/gb...it was my first time buying something from these folks & despite my wrx's problems, they left me with a very good impression). The install process went well and on my way back home i was really feeling the power the minor upgrade resulted in.

On an errand later that day i noticed a knocking/vibrating noise coming from the middle of the engine bay...specifically when I put her in reverse or on 1st or 2nd immediately after mashing down on the peddle . I did a quick visual check at home and made sure all of the bolts were tight and the installation of the downpip/uppipe was solid.

So i took the wrx back to MPJ to have them take a look at it. At first they thought it was due to the heatshield rubbing against the downpipe...but that didn't end up being the problem. They did a visual check and confirmed that it was not the uppipe and downpipe causing the problem. After a few hours...nothign was resolved, & all of us were pretty much baffeled about noise. It was mentioned that the problem could be a busted LSD, or my tranny could be about to go (i have 42k miles on my wagon).

Anybody have any thoughts or ideas what the vibrations could be? The noise is beginning to become more excessive and occurs when i lay off the gas at highway speeds as well.

Thanks for all of the help.

 

just for a little clarification

mpj just sells parts and gb is the one that does all the installs and stuff

 

yup, they just share a building

 

I'm sure GB went over everything, but also maybe check the bracket that holds up the downpipe. It is in the rear section right infront of the rear o2 sensor. Sometimes if that bolt isnt installed or if it's loose you will get a rattle sound while in reverse or just sitting at a stop light.

 

yeup just checked it...the bracket is tightly held. btw. the rattling sound is accompanied by a vibration which can be felt on the floor panel.

any ideas?

 

hmmm there really isn't a whole lot that is removed that could cause such vibrations, and the new helix pipes have great fitment so they don't really touch anything else. I'm not sure if GB jacks the engine up in order to remove the stock uppipe, but maybe see if the nut holding the engine mount is secure. Thats really the only other thing i can think of that would cause a vibration like you are describing.