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#1
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Exhaust Noise Re-visited
Both my '92 and '94 have identical exhaust noises. I concentrated on the '92 because iut also had a leak. I have replaced the leaky pipe (left front cat') and all new gaskets. I have NO leaks now. I also relaced or repaired all of the heat shields so they are not rattling.
I have heard that there is an internal baffle that breaks loose and can cause this noise. Noise occurs at part throttle, mainly light acceleration. It goes away at idle and half + throttle.Noise is definitely near center of car. I have listened with a hose and can not be sure where noise is coming from, definitely internal. Does this baffle problem occur in the Y-shaped, 2-into-1 cat' or in the first silencer just behind it? Ken '92 Pearl '94 Bordeaux '69 Lotus Elan +2 with Cosworth BDR |
#2
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How did you repair all of your heatshields?
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Tim 92 Liquid Silver SVX 5MT 2009 BMW Z4 (Gone) 2012 Camry V6 SE |
#3
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heat shields
Most of the bad heat shields were on the primary cat' that I replaced. The pipe comes with all new shields, for $360! The remaining shields were OK except for one of the welds on the U-piece. I put a layer of fiberblss heat shield beteen pipe and shield and it bolted up tight and no vibration. I don't know how long it will last but it is not rattling.
Ken p.s. It is a little scary laying under an SVX on jack stands with motor running and car in gear and all 4 wheels spinning with wife blipping throttle to make the noise !! |
#4
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Re: heat shields
Quote:
'Ma'am, you say that your husband laid under the car and asked you to step on the gas???'
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2005 RX-8 Grand Touring 2005 Outback 2002 Mercedes-Benz E320 wagon END OF LINE |
#5
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and the answer is.....
Lots of nice postings but I was hoping somone had an answer to the original question. Whcih of the two boxes is known to make the noise. The 'Y'-shaped cat' or the first stage muffler?
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#6
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The resonator is known to be prone to make the noise. I guess you may call it the first stage muffler.
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#7
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thanks
GL
Thanks, a real answer to my question. I'll try it on one car and see if it works. Ken |
#8
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Re: and the answer is.....
Quote:
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#9
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I replaced my "2 into 1" cat with an aftermarket, with just straight pipes in front of it. It rattled like crazy. Dynomax sent me another one, and it did exactly the same thing. So I welded in some glass packs right after the o2 sensors and BINGO, no more rattle. It sounds absolutely unbelievable now.
Stephen
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92 Ebony - Level 10/n2o REAR-ENDED 92 Teal - painted yellow/4.11 5spd/n2o SOLD 92 Claret - 4.44 SOLD 94 Barcelona - FWD SOLD 92 Ebony - 3.90 SOLD 94 Laguna ROLLING w/4.44s/Ecutune ECU +TCU/STI springs/Infiniti M45 rims |
#10
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emissions??
Stephen
Have you stopped at your local emission test facility lately? It would be good for us to see the results. Ken |
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