Just installed a 5/8 plenum spacer, and Im getting a very high pitched whistle just as the car is in idle. Any ideas? Im going to try loosening the screws might be too tight causing the spacer to warp, but suggestions are welcomed.

Anyone else run into this problem?

 

did you use a torque wrench? the outside bolts must be torqued to 100 ft lbs and the inside bolts must be 80 ft lbs. i think that would be the first place to start if you didn't use a torque wrench. but yeah if the bolts are too tight you will warp the spacer and get the plenum whistle

2004 G35x, Motordyne 5/16" Copper Iso Thermal Plenum Spacer, Z-Tube with Pop-Charger, NGK Iridium, Mobil 1 Synthetic, EBC Green Stuff Pads with EBC 3GD Sport Rotors, Brake Master Cylinder Stiffener, OEM Spoiler, Grounding Kit, 235/50/17

 

I had no problems with my 5/16. did you tighten them down in order? Maybe one isnt tightened?

 

DO NOT torque to 100 ft lbs, it is INCH lbs and there is a specific order to do it in

http://www.motordyneengineering.com/manual.pdf

 

^ INCH POUNDS!

Its different from foot pounds

100 inch pounds is 8.33 Foot pounds.

 

while the other points are valid,

you probably need to get a new gasket

 

oh crap. . . I mis typed. . In lbs!

 

I am willing to bet that the rubber surround for the oil filler neck is wedged between the plenum and the spacer.

 

what plenum spacer is it?

You need to retorque the bolts down. be careful, some people have overtightened and caused much more serious problems...

 

does it sound something like this?

 

^
lmao

 

I can't watch YouTube videos at work, but please tell me that is the whistling muffler tips video with Bub Rub and Lil' Sis.

It's like an alarm clock...woo wooooo!

 

^ Haha, I love that video! The best is when he almost drills a stop sign and a parked car while trying to show off by speeding away at the end.


"Iss only in da moaning, you should be up cooking brefass o' somethin'."

 

Haha, I was just recently introduced to it's greatness by my wife. I love it.

 

After seeing that video it totally makes me want to get one of those whistle tips. Only two problems:

1. Only available in Oakland
2. Hurts performance because "Iss juss fo' decoration"