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Old 03-31-2012, 07:28 PM   #1
WRXineohP
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Default 2010 WRX with a Knock? What to do?!?!?!

I have a 2010 WRX with exactly 33k miles on it. I wont sugar coat this... I have driven the car hard.

I modded it with:
Invidia Turbo Back exhaust
Electronic Boost Controller GrimmSpeed
GrimmSpeed Up-Pipe w/38mm EWG Port
38mm Tial EWG
Cobb Short Ram Intake
One Step Colder Plugs
P+L Motorsports Custom Tune

Sometimes when I rev it and hold it at 1300-1700 RPM's you can hear a very noticeable LOUD knock seemingly coming from under the inter-cooler. If you rev fast from 1-3k no knock at all. The knock is intermittent... which would make more sense with a rattle? I'm terrified to take it to Subaru cause they will probably laugh it out the door it came in through. BTW the car drives fine. No power loss, and no check engine light. I need advice...thanks!
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Old 03-31-2012, 07:44 PM   #2
doa
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Was it ever driven low on oil? Possibly a rod bearing? Try and find a video that has a similar noise.
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Old 03-31-2012, 08:16 PM   #3
WRXineohP
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never driven on low oil... i take extremely good care of the car and replace everything needed when needed and some things before needing replacement. I love her...shes my abused baby
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Old 03-31-2012, 08:47 PM   #4
WRXineohP
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Well i just checked the oil. I had an oil change done 3k miles ago... the motor was bone dry on synthetic subaru oil done by the dealer. they said it was due back for oil at 36k so i still had 3k miles to go according to them. I added some royal purple and the noise went away... I walked behind the car to see oil all over my driveway from the exhaust. It took 4 quarts to fill it just above the high mark on the dip stick... my oil light never came on either... im furious atm... ill upload the video of the noise and the pic of the oil...
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Old 03-31-2012, 08:54 PM   #5
wrx904
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Quote:
Originally Posted by WRXineohP View Post
Well i just checked the oil. I had an oil change done 3k miles ago... the motor was bone dry on synthetic subaru oil done by the dealer. they said it was due back for oil at 36k so i still had 3k miles to go according to them. I added some royal purple and the noise went away... I walked behind the car to see oil all over my driveway from the exhaust. It took 4 quarts to fill it just above the high mark on the dip stick... my oil light never came on either... im furious atm... ill upload the video of the noise and the pic of the oil...
WoW, that sucks. This is the reason that I do my own oil changes; RT6.
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Old 03-31-2012, 08:56 PM   #6
WRXineohP
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Old 03-31-2012, 09:04 PM   #7
WRXineohP
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Old 03-31-2012, 09:05 PM   #8
WRXineohP
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Anyways...guys...what should I do?
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Old 04-01-2012, 07:54 AM   #9
Spenk
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Quote:
Originally Posted by WRXineohP View Post
Classic.

Quote:
Originally Posted by WRXineohP View Post
Anyways...guys...what should I do?
Start researching a rebuild...and realize that your failure to do something as simple as checking the oil once a week is going to cost you $$$.
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Old 04-01-2012, 02:05 PM   #10
WRXineohP
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Well I put oil in and the knock went away. My dad is not convinced the motor is shot....would you guys say it is?
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Old 04-01-2012, 02:46 PM   #11
Uncle Scotty
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its blowed up

and you have just proven to me that you shouldnt let the dealer put garbage oil in your car
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Old 04-01-2012, 03:49 PM   #12
doa
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Quote:
Originally Posted by WRXineohP View Post
Well I put oil in and the knock went away. My dad is not convinced the motor is shot....would you guys say it is?
Yah that does not sound good at all and I would not drive it at all to prevent further damage. I would price out a new short block if I were you.
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Old 04-01-2012, 06:21 PM   #13
Tripintaz
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That motor is hurt. Keep driving it and it will break and cause even more damage. Stop driving it and start looking into getting it rebuilt ASAP. Also, I cannot even IMAGINE why the car would be 4 quarts low on oil after 3000 miles. Did they mistakenly put 5w20 in it or something? No low oil light came on? sounds fishy to me.
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Old 04-01-2012, 07:40 PM   #14
WRXineohP
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No low oil light. I doubt they put the wrong oil in. Im upset over it. Should I even try to warranty it? I just came in from the garage and im putting stock all back on. which is like a big puzzle.
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Old 04-02-2012, 05:33 PM   #15
bluesubie
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Quote:
Originally Posted by WRXineohP
No low oil light. I doubt they put the wrong oil in. Im upset over it. Should I even try to warranty it? I just came in from the garage and im putting stock all back on. which is like a big puzzle.
The dealer will know that the parts were replaced.

-Dennis
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Old 04-02-2012, 05:49 PM   #16
Bacon117
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Quote:
Originally Posted by Uncle Scotty View Post
its blowed up

and you have just proven to me that you shouldnt let the dealer put garbage oil in your car
Doooooooood! He just admitted to beating the ever loving snot out of it. Obviously blowing oil out of the exhaust, he never checked the oil, and it eventually ran out. I don't care if you're using jesus cum, a car that get's beaten on will eventually kill itself. Especially if it runs out of oil b/c you have a bad oil control ring or somethign else putting oil in the cylinder.

CHECK YOUR DAMN OIL ONCE IN A WHILE!

Edit: Bad luck you started losing oil, and didn't notice before it completely ran out, but don't blame the dealer. If it's something they did, it would have happened long before you got to 3k in this oil change. Put it back to stock, and try for the warranty.

Last edited by Bacon117; 04-02-2012 at 05:59 PM.
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Old 04-02-2012, 06:01 PM   #17
Uncle Scotty
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Quote:
Originally Posted by Bacon117 View Post
Doooooooood! He just admitted to beating the ever loving snot out of it. Obviously blowing oil out of the exhaust, he never checked the oil, and it eventually ran out. I don't care if you're using jesus cum, a car that get's beaten on will eventually kill itself. Especially if it runs out of oil b/c you have a bad oil control ring or somethign else putting oil in the cylinder.

CHECK YOUR DAMN OIL ONCE IN A WHILE!
I have beat my car pretty good at times...actually both my wrx's.....and since I stated using GOOD oil, I never have had to add any oil between changes....and the pcv system seems to be the culprit in most cases where there isnt another mechanical issue.

I have researched this issue at GREAT LENGTH and I am convinced that using the WRONG OIL is responsible for the vast majority of these engine failures.
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Old 04-02-2012, 06:08 PM   #18
Bacon117
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Quote:
Originally Posted by Uncle Scotty View Post
I have beat my car pretty good at times...actually both my wrx's.....and since I stated using GOOD oil, I never have had to add any oil between changes....and the pcv system seems to be the culprit in most cases where there isnt another mechanical issue.

I have researched this issue at GREAT LENGTH and I am convinced that using the WRONG OIL is responsible for the vast majority of these engine failures.
I know we don't agree on how big of a deal oil weights are. I know at Ford, they go through a LOT of work comparing oil weights and contents, and I assume Subaru does the same. So if it's recommended from the factory, it should have passed the test.
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Old 04-02-2012, 10:24 PM   #19
bluesubie
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Quote:
Originally Posted by Bacon117

I know we don't agree on how big of a deal oil weights are. I know at Ford, they go through a LOT of work comparing oil weights and contents, and I assume Subaru does the same. So if it's recommended from the factory, it should have passed the test.
5W-30 is not recommended by the factory. It is listed as the preferred weight by SoA for fuel economy and the OP's owner's manual states thicker viscosities are recommended for severe conditions and in higher temps. Although FHI does have to approve SoA's recommendations. By recommending 5W-30, SoA is saying that it's fine to run an oil with an operating viscosity of a 20 weight. Make one modification to your engine's performance and you should toss the oil weight recommendations out the window (unless you've chosen viscosity based on oil pressure readings).

It's funny that someone could probably post here asking if running 5W-20 in a WRX was ok and people would think they were nuts. Fact is, a Resource Conserving oil will shear to a 20 weight very quickly so there really isn't any difference since 5W-20's are very stable.

-Dennis

Last edited by bluesubie; 04-02-2012 at 10:30 PM.
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Old 04-02-2012, 11:00 PM   #20
doa
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Quote:
Originally Posted by bluesubie View Post
5W-30 is not recommended by the factory. It is listed as the preferred weight by SoA for fuel economy and the OP's owner's manual states thicker viscosities are recommended for severe conditions and in higher temps. Although FHI does have to approve SoA's recommendations. By recommending 5W-30, SoA is saying that it's fine to run an oil with an operating viscosity of a 20 weight. Make one modification to your engine's performance and you should toss the oil weight recommendations out the window (unless you've chosen viscosity based on oil pressure readings).

It's funny that someone could probably post here asking if running 5W-20 in a WRX was ok and people would think they were nuts. Fact is, a Resource Conserving oil will shear to a 20 weight very quickly so there really isn't any difference since 5W-20's are very stable.

-Dennis
would you recommend a 5w40 or 50. Im using redline oil and its a 2005 wrx.
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Old 04-03-2012, 12:05 AM   #21
Uncle Scotty
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Quote:
Originally Posted by Bacon117 View Post
I know we don't agree on how big of a deal oil weights are. I know at Ford, they go through a LOT of work comparing oil weights and contents, and I assume Subaru does the same. So if it's recommended from the factory, it should have passed the test.
...and.....fraud has a LOT more $$$ to use to engineer their engines internal specifications and materials to take advantage of using a thinner oil to achieve better mpg without failures that we have......how many turbo gas engines does ford sell and recommend 5w20 for??

well anyway....viscosity is a HUGE issue for subaru engines regardless of what fraud does
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Old 04-03-2012, 02:27 PM   #22
Tripintaz
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I drive my Scooby very hard and I am beyond stage 2 power levels. I run T6 and check the oil every 1000 miles or so. At most I have to add about 1/8 of a Qt. after about 1000-2000 miles. I run my T6 to about 5000-6000 miles as well depending on how I have driven the car. My car has 20K+ HARD miles and its running like a champ.
I cannot even fathom how a car gets 4 QTs low on oil and not noticed. There would be a difference in how the car runs, power, noise, and operating temperature. Even when I was a noob and ran Mobil1 5w30 in my 2010 WRX I saw it 1/2 QT low after 1000 miles and after 3750 miles noticed that adding 2.5 QTs of oil over time was not right. I changed to T6 and never burned oil like that again. In fact I am using oil, not burning oil, but most subies use a little oil.

4QTs blows my mind.
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Old 04-03-2012, 08:50 PM   #23
mikeythejew
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Subaru chose to recommended 5W30 to satisfy the Corporate Average Fuel Economy (CAFE) EPA rule enacted by congress in the 70's. The STi just misses paying the gas guzzler tax at the EPA rating of 23 highway. A vehicle must obtain 22.5 MPG to avoid it. If the STi was tested at 21.5 - 22.4 MPG highway, a $1000 tax would be added to the car appearing on the sticker making it a reality Subaru wouldn't sell it in the U.S..
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