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Old 09-15-2007, 10:19 AM   #1
mmiller2002
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Join Date: Sep 2007
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Location: Fort Worth, TX
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2002 WRX Wagon,Com-C
RCE wgn sprngs/Konis/H6

Default New to WRX, engine noises and other questions

Pardon my newbie ignorance. I'm looking at used WRXs and test drove my first one yesterday.

I expected a turbo "whirring" noise, but I did not expect the hissing sounds that were also there. Are these normal? What is the cause?

Also, is the WRX hood fiberglass? The one I drove sure didn't feel like metal.

What are weak points to look for in a 75K+ mileage car?

Is the AWD system robust?

Thanks
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Old 09-15-2007, 10:29 AM   #2
jamesnobrakes
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You can't hear the turbo because there's a turbo-silencer box in the right fender. An aftermarket intake will let you hear it, but you have to be very carefull because most aftermarket intakes will screw up the MAF sensor, which will cause problems. I use the SPT one and I like it.

The hood is aluminum.
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Old 09-15-2007, 10:49 AM   #3
SilverSubaab
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Hard to tell what is normal or questionable on the internet, especially concerning a Subaru/WRX. You will hear turbo spool sounds, but I would have any car you are interested in inspected by a local Subaru dealer or someone you trust who knows Subaru.
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Old 09-15-2007, 10:57 AM   #4
CynicX
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The hood is aluminum....dents fairly easily (I have MINOR hail damage) but its really light....
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Old 09-15-2007, 01:48 PM   #5
mmiller2002
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RCE wgn sprngs/Konis/H6

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Thanks.

I did hear the subdued turbo whine. Is the popping/hiss sound the wastegate blow-off valve? Is there a way to make it quieter?

What's the polished cylindrical thing mounted on the front of the intercooler?
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Old 09-15-2007, 01:55 PM   #6
SurfWagon
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I would assume that you're talking about the blow off valve. The stocker isn't really polished, but many aftermarkets are....look to see if there is a hose that runs out of it that's about 1" thick. If it doesn't have one, I would bet it's an atmospheric BOV and that would sure create some of the noises you heard. Sounds cool, but messes with AFR unless there is some form of engine management.
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Old 09-15-2007, 04:51 PM   #7
kpluiten
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Never mind.
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Old 09-15-2007, 05:23 PM   #8
rkramer
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it 'sounds' like that car has numerous mods, at least a bov and maybe aftermarket hood? i wouldn't go anywhere close to a modded wrx with high mileage, you are probably getting someone else's problem that they unloaded. ANY used wrx you buy should be in bone stock condition, at least powertrain wise... Take a good high res picture of the entire engine bay and post it on here if you really want to know.
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Old 09-15-2007, 05:51 PM   #9
Gas.I.Lean
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I had the same sounds with my stock wrx, the turbo "whine" is not as easy to hear as one expects. You hear more of a sucking lower "wurrr" with the snorkus in place. The hood is light, aluminum as stated above, fiber glass or carbon is easy to tell. Tapping or just touching should tell you, fiberglass is warm to the touch and sounds hollow. Aluminum stays cool as its metal and the sound is metallic also.
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Old 09-16-2007, 08:34 AM   #10
mmiller2002
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RCE wgn sprngs/Konis/H6

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Thanks for the input. I'm not interested in buying this particular car, but it was my first WRX drive, so I'm trying to learn the ropes in case I want to buy one. The thing that concerns me about WRXs compared to the other models I'm looking for is that they seem to be attract lots of owners that have "hacked" things just for show or cool sounds. I'll bet that I'm a bit older than the average WRX owner, and can wait for the right car to come along.

Another general question, did all WRX's come with a rear wing?

Thanks for the great info!
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