engine noise

"OPPOsaurus WRX" (opposaurus)
06/14/2016 at 15:55 • Filed to: None

This has been an on going thing. After about half an hour of driving the sound of my engine changes. It sounds almost like a giant fan and loses the ‘throaty’ sound. If I get back up to speed it usually goes away by 30 mph or so and the engine sounds returns to normal. There no squealing or ticking or dentist drill sounds. I guess the closest thing could be a window A/C unit. I suspect it has something to do with the temperature of the engine. The engine seems to run at a normal temperature and performance doesn’t really change at all. i just did an oil change and it didn’t make any difference. The temperature doesn’t jump up if I stop either.

The next repair which I plan to do later this month is the secondary air injector pump. I would love to have that fix this issue too but I doubt it. I’m still on the fence on if I want to keep it or not but I might as well keep it alive while I have it.

I just passed 177k miles. You want to make tow truck jokes please go somewhere else. I’m going to go DRIVE home now. Thanks.

DISCUSSION (35)

V12 Jake- Hittin' Switches > OPPOsaurus WRX
06/14/2016 at 16:00

Heh lol it’s broken shuld have bot a Miata

bob and john > OPPOsaurus WRX
06/14/2016 at 16:02

fan turning on an off....dunno WHY though. might be worth looking into

OPPOsaurus WRX > V12 Jake- Hittin' Switches
06/14/2016 at 16:02

don’t want a hairdresser car thanks.

OPPOsaurus WRX > bob and john
06/14/2016 at 16:02

i dont think its something turning on and off. It seems to gently fade with speed

S65 > OPPOsaurus WRX
06/14/2016 at 16:03

It’s twin turbo?

OPPOsaurus WRX > S65
06/14/2016 at 16:04

yes it is. from what I understand, the turbo issue is a high pitch sound. this might be more like a vacuum cleaner.

PartyPooper2012 > OPPOsaurus WRX
06/14/2016 at 16:05

Hard to pin it based on your description...

1) let your car idle for a while and make sure cooling fan kicks in. If that’s not the noise, then keep looking
2) is it possible you have danger to your manifold? Your exhaust manifold gets hot, expands, creates a leak and causes that noise... when it cools down a bit, it contracts and stops making that noise? inspect manifold for cracks?
3) if all else fails, turn up the tunes and ignore.

OPPOsaurus WRX > PartyPooper2012
06/14/2016 at 16:07

lol #2 i thought u were just making a bad F&F joke but your are and arn’t at the same time. I’ll have to think on that one but it it doesn;t have the burble of an exhaust leak,

PartyPooper2012 > OPPOsaurus WRX
06/14/2016 at 16:09

It wasn’t a joke. More of a nod to F&F. Did you have this problem in the winter - assuming your winter is my north east winter? Meaning was it making this noise when it was cold out?

Spaceball-Two > OPPOsaurus WRX
06/14/2016 at 16:10

I think what you're describing is the injector pump. I just had mine replaced a month ago. Eventually it will seize and throw a CEL, but won't affect performance. It's just annoying as hell.

BvdV - The Dutch Engineer > OPPOsaurus WRX
06/14/2016 at 16:10

So you say you hear it at low speed, but it goes away at higher speeds? In that case I think it could be the fan which is cooling the engine which is being slowly shut down, since the driving wind is increasing.

But that is just my 2 cents. Anyhow I hope it isn’t a problem, or at least an easy fixable one if it is.

V12 Jake- Hittin' Switches > OPPOsaurus WRX
06/14/2016 at 16:11

Bruv, trac day

PartyPooper2012 > OPPOsaurus WRX
06/14/2016 at 16:13

Some Hondas have vacuum cleaner in trunk. Check yours and make sure it’s off ;)

d15b > OPPOsaurus WRX
06/14/2016 at 16:13

lol

Milky > OPPOsaurus WRX
06/14/2016 at 16:15

Step one:

Kinja'd!!!

I know, not a 2.7t, but too good to pass up.

Roadster Man > OPPOsaurus WRX
06/14/2016 at 16:16

I bet your radiator’s cooling fan is on its last legs.

Jake - Has Bad Luck So You Don't Have To > V12 Jake- Hittin' Switches
06/14/2016 at 16:18

You’ve seen my Miata, right?

TheHondaBro > OPPOsaurus WRX
06/14/2016 at 16:18

You driving the tow truck?

MontegoMan562 is a Capri RS Owner > OPPOsaurus WRX
06/14/2016 at 16:21

It sounds like a fan to me too, maybe check on replacement fans? I’m sure there’s about 100 audi forums you could ask, maybe record the sound?

fourvalleys > OPPOsaurus WRX
06/14/2016 at 16:23

Sorry to hear that you hate fun.

Daily Drives a Dragon - One Last Lap > V12 Jake- Hittin' Switches
06/14/2016 at 16:28

But what about carrying more than one person?

jkm7680 > fourvalleys
06/14/2016 at 16:36

The Allroad is fun.

V12 Jake- Hittin' Switches > Jake - Has Bad Luck So You Don't Have To
06/14/2016 at 16:41

Yeah. It's the epitome of mechanical perfection .

not for canada - australian in disguise > OPPOsaurus WRX
06/14/2016 at 16:42

Kinja'd!!!

V12 Jake- Hittin' Switches > Daily Drives a Dragon - One Last Lap
06/14/2016 at 16:43

Who neds mor than one friend when you have a Miata

ESSSIX GmbH - Accountant/Wagon Thumper > OPPOsaurus WRX
06/14/2016 at 16:59

Fan clutch kicking in? The 2.7 is a hot box so that could explain it kicking on and off based on temps which speed directly affects.

I haven’t had a clutch fan in over a year (EFK), but I do know that they’re loud as hell. You should notice that there’s more load on the engine too (rotational drag if you will)

OPPOsaurus WRX > fourvalleys
06/14/2016 at 17:01

I loved fun then I sold the WRX. WRX >Miata