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Old 12-28-2007, 10:57 PM   #1
parat75
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Angry Really noisy engine, lots of ticking

Basically LOTS of ticking under about 75% throttle, then goes away under boost and more throttle, or no boost and under 75% throttle. Kind of hard to describe. Ive posted this issue a couple of times in other topics of NASIOC and Ive asked other people I know that are mechanics and good with cars...Ive never actually gotten a final definitive answer, and I know that I prob wont get a final answer without taking it to the dealer...I would but Ive heard bad things about my dealer (Riverside Subaru Little Rock, AR) and I dont want to take the chance of taking it to them and them "finding" something wrong with it and denying me any warranty work. Truthfully, I hardly ever drive my car hard...in fact it gets driven to work and back home...Im in the air force and live on the base, so it takes me about 2 minutes to get to work if that. I bought the car brand new the end of Jan 07 then got deployed for 6 months in Mar. I got the first oil change done when I got back and switched to royal purple 5W30...I had the techs at the base auto shop change the oil while i watched them. Just to be clear the engine has actually made this noise since i got it as far as i can remember, and with the mods I put on it made it more pronounced. As far as I can tell, the car drives hard ans strong and doesnt seem to be affected at all. ITS JUST REALLY NOISY and it frankly concerns me...other people often notice the noise and ask me what is wrong with my car, but I can never tell them anything. Ive heard its normal, that it could injectors, blah blah, and Ive heard that its just what a boxer motor sounds like. This is NOT my first Subaru I had a bugeye wrx before this and it did not make this noise. Im putting this in here so that hopefully someone with alot of experience with Subarus can give me some advice on either what to do or some better insight on what the hell this noise is. My current mods are: AP V2, Titek catted DP, APEXi N1 CB, SPT intake and heat shield, Cobb Turbo heatshield. Please help! Thanks
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Old 12-28-2007, 11:28 PM   #2
DrD
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Well - subaru engines are notoriously loud - does it seem loud compared to other WRXs? Maybe go to the dealership and ask them if you can listen to one? Or post in your local forum and see if someone who's familiar with the engine can take a listen?
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Old 12-28-2007, 11:42 PM   #3
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its really hard to tell, and honestly you shouldnt take anyones advice over the forum because our perceptions of what you can describe are all different. now if the car was in front of me or someone else that would be a whole different story.

bring it to the dealer, you car is under warranty. they will tell you then and there if it is normal or not. it wont cost you a dime to go there and have them check it out.
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Old 12-28-2007, 11:55 PM   #4
parat75
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Hmmm...what about my mods? Would it be safe to say that they may come back and say "well this is a brand new car, and youve already modified it, so thats prob what caused it." ???
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Old 12-28-2007, 11:59 PM   #5
parat75
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Quote:
Originally Posted by DrD View Post
Well - subaru engines are notoriously loud - does it seem loud compared to other WRXs? Maybe go to the dealership and ask them if you can listen to one? Or post in your local forum and see if someone who's familiar with the engine can take a listen?
My dealer has ZERO 06-07 imprezas...all they have is 08s...should I still check it out??? On that note, I took my wife to the dealership (we werent in my subaru) and we were there to buy her one...she test drove an 07 legacy spec edition and an 08 outback sport...none of which made the noise. I know all cars are different even if theyre the same car, but im not sure that makes sense in this case???
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Old 12-29-2007, 12:08 AM   #6
STIFLYBY_RANGER
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i know youve heard this before but the injectors it what comes to mind without having it right in front of me... your ap will void your warr if they notice it and no matter what may be wrong they will find a way to blame it. your exhaust will be fine and the spt is fine.
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Old 01-01-2008, 01:00 AM   #7
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If it's substantially louder than the other 2.5l engines you have heard, then it's probably worth having the service dept. take a listen - as far as the mods go, what's done is done - just bring it in (unless the service department is staffed by morons, they're going to know if you try bringing it back to stock)
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Old 01-01-2008, 03:47 PM   #8
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I switched from RP 5W30 to RP 10W40 and the engine quieted down quite a bit. I'm of the opinion that 5W30 is to thin for our hotter running turbo engines, plus 10W40 is still with in my temp. range for where I live. I'm not saying this IS your problem, just something to consider.


For what it's worth, with the addition of a bell mouth DP things do get quite a bit noisier.
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Old 01-01-2008, 06:12 PM   #9
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Since you're worried about your local dealer's attitude, why not first take it to a local non-dealer shop that knows Subies? Spend $100 on a diagnosis/checkout, and if there is something wrong, you'll have an independent diagnosis to show to the dealership afterwards if they claim nothing is wrong with the car.

PS - I agree about running 10wxx oil.
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Old 01-01-2008, 07:14 PM   #10
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with my dp, and ap stg 2 mine is really load too, i never really heard it before, but now it is really loud. it drives me crazy, but everyone i have talked to and that has heard it has said it is the injectors, (if you listen in the wheel wells you can heard it louder too) the AP makes the injectors work harder.
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Old 01-02-2008, 12:44 AM   #11
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timming belt tensioner?
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Old 01-02-2008, 02:17 PM   #12
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x2, rare but have the tensioner checked, they are hydraulically charged and sometimes leak and begin tapping on the block, seen this more on 04 and older models, but it has come up
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Old 01-02-2008, 03:23 PM   #13
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sounds like injectors mine does the same I wouldn't worry, unless it's broke dont fix it.
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Old 01-02-2008, 05:24 PM   #14
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Quote:
Originally Posted by nerdydorkus View Post
its really hard to tell, and honestly you shouldnt take anyones advice over the forum because our perceptions of what you can describe are all different. now if the car was in front of me or someone else that would be a whole different story.

bring it to the dealer, you car is under warranty. they will tell you then and there if it is normal or not. it wont cost you a dime to go there and have them check it out.
good point..
I couldn't help but ponder a generalized answer anyway.

1. Royal purple sucks a**

My best guess (I would swear I have read a nearly exact description of your problem already with a different date...for this the third time..internet is fabulous.):

2. A 2 minute ride for any engine is bad for the engine. you could be teasing the system into no open thermostat and shutting the car off with it under abnormal pressure. Old subes used to release cold coolant into the reservoir, through the radiator cap that detected abnormal pressure.Most often short rides, not a full warm engine causes it. In maine.. it could be a dramatic drop in temperature even while car us running full speed ahead! (subarus aren't the only ones that do this) and create the same bad pressure with no errors, this never lasts..but there is an equation that can be bad. yours is feeding it with a short ride, and letting car sit for long time.. As some know cars keep warming after car is shut off for such and such a time. Thermostat open then shut off is quite gentle. Hence full warm ups are a must do.now to the common theory..
Subarus are aluminum.. the heads could be moving in the thousands of an inch creating noise, moving due to the bad pressure. As it does go away (as you stated) it is like having a perfect error.. and it isn't even an error. Try running a long trip when you can with real oil (castrol perhaps- and 5w30 sucks). If it starts using coolant.. well we all know EJ and thier cylinder heads..

good luck at the dealer.

P.S. I got rid of the sube thermostats and went for a common brand name that obviously opens easier.. it is my thoughts for all subes old new ej or not.

Last edited by subari87; 01-02-2008 at 05:34 PM.
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Old 01-02-2008, 06:48 PM   #15
Glenn Hough
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Parat,

There's nothing wrong with your car. Don't worry about what the others have said on here either. From the way you describe it, the sound you're hearing is wastegate flutter. It sounds like a fast clicking, or "pssh-pssh-pssh" sound. This explains why you only hear it at partial throttle when the boost is being bled-off. The noise becomes more pronounced after adding an aftermarket downpipe, because they are generally made out of thinner metal than the stock one.

My car does the same thing. If you're still uncomfortable with this, try searching for "wastegate flutter." You'll find some advice on how to fix or reduce the noise, but I had no luck. The best bet is to heat-wrap your downpipe. It would muffle it a little. I just deal with it.
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Old 01-02-2008, 06:55 PM   #16
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Another common noise is slight piston slap commonly seen in 00-04 impreza's,though havent seen one in a turboe'd engine yet. This noise is heard upon cold startup and can last for up to 15 minutes, noise chages with colder ambient temperatures. If the noise occurs after the 15 min warmup, there may be some problem. Your Subaru dealer has a special diagnostic procedure for engine noise involving disconnecting fuel injectors and such.
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Old 01-02-2008, 07:50 PM   #17
Glenn Hough
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Trust me... There's nothing wrong with your car. Don't worry about all this speculation. It seems like most of these people either didn't bother to read your post thoroughly or know absolutely nothing about your engine.

Last edited by Glenn Hough; 01-02-2008 at 07:50 PM. Reason: spelling
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Old 01-03-2008, 09:42 AM   #18
06Roxy
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Have you gotten a stethescope and tried to narrow down exactly where the tick is originating? this is a cheap and very helpfull tool in narrowing down the phantom ticks of subarus
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Old 01-03-2008, 09:46 AM   #19
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I with Glen, my 06 makes noise in the same rev range that stops under boost. I've traced it down to wastegate flutter.
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Old 01-05-2008, 09:25 PM   #20
parat75
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hmmm...thanks for all the replies...Im going to switch to 10W30 RP, then I think Im going to make a trip to the dealer and have them look at it...there prob really isnt anything wrong, but I cant be too careful...hell its practically brand new, and if the dealership cares about mods, then maybe theyll realize Im not trying to hide anything
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Old 01-06-2008, 09:26 PM   #21
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i would go back to stock if i was going to take it to the dealer, alot of dealers have a reputation for trying to find reasons to void your warrantee, even though you did haha.

just my .o2

good luck!
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Old 01-07-2008, 11:19 AM   #22
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That's your wastegate flapping. It's normal for an aftermarket downpipe.
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Old 01-07-2008, 11:33 AM   #23
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well here is the thing, i have the same problem...my car makes the valve tap sound because my injectors...it hit fuel cut high in 4th gear, and if it is a real tin sound, its the exhaust and wastegate, ive checked it out. nothing to worry about, try getting better gaskets
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Old 01-07-2008, 01:51 PM   #24
parat75
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Quote:
Originally Posted by Scooby89 View Post
well here is the thing, i have the same problem...my car makes the valve tap sound because my injectors...it hit fuel cut high in 4th gear, and if it is a real tin sound, its the exhaust and wastegate, ive checked it out. nothing to worry about, try getting better gaskets
Yeah I overboosted and hit fuel cut for the first time yesterday...so it would seem anyway, I was retarded and reset the ECU b4 I checked the code...hopefully my AP will be able to bring it back up...so you think gaskets might dampen the sound?
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Old 01-09-2008, 02:00 PM   #25
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Quote:
Originally Posted by parat75 View Post
Yeah I overboosted and hit fuel cut for the first time yesterday...so it would seem anyway, I was retarded and reset the ECU b4 I checked the code...hopefully my AP will be able to bring it back up...so you think gaskets might dampen the sound?
Not to sure, i know my leak has its days where its worse than others, but the sound always seems to be the same, i guess it would make sense that if you fix the gaskets than it would sound better, have not tried yet, im going to this weekend, ill let you know
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