I have a bad knocking. - Subaru WRX Forum
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#1 Old 07-03-2011, 03:56 PM
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I have a bad knocking.

so I have a 02 wrx sedan, it has a VF39 turbo, sti tmic, straightpipe 2" exhaust, intake and hks SSQV BO. I went out last night and i raced a few of my friends and it was fine, on the way home i had problems. I was going about 40mph in 4th and my turbo was not in boost but spooling which is unusual for that gear, then when i put it in 3rd i could hear a knocking. The car then died and i pulled off to the side. i let it sit then started it again. the engine shook and made some noise then there was a loud knock. I turnned the car off. I think it is either a spun bearing or a bent rod or something along those lines. I havent had it check yet. Hoping to see what you guys have to say, thanks alot

Tanner
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#2 Old 07-03-2011, 05:39 PM
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Sounds like what happened when I broke a piston connecting rod.

Mike
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#3 Old 07-05-2011, 07:54 PM
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Was the knock in sync with the rpms and sound like it was coming from the bottom of the engine? In other terms....a low/deep sounding knock.

Kirt
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#4 Old 07-07-2011, 11:25 AM
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yes im pretty sure like 90% its a spun bearing
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#5 Old 07-07-2011, 05:30 PM
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If it sounds like what I described, then yeah. I'd bet its a bearing/rod issue. Normally if a bearing goes it can take the crank and rod with it.

Kirt
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#6 Old 07-08-2011, 06:21 PM
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awesome!! I have to find out what parts ill need.
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#7 Old 07-08-2011, 07:45 PM
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Ask me how I know

Kirt
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#8 Old 07-08-2011, 08:21 PM
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Does it sound like this?

Parts needed:
New motor

Resident Grumpy Old Man(Keith)
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08' LGT Gears...
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#9 Old 07-12-2011, 05:58 PM
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no not at all
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#10 Old 10-26-2011, 09:28 PM
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i have a knocking noise at 3k rpms in first and second gear but not when i idol could this be the same issue as a spun bearing or bad rod? my car has never died on me but than again ive only had it for four days
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#11 Old 02-20-2012, 05:13 PM
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i guess am facing the same issue.it was a knocking tuckling sound...and i was accelerating to hear the voice....ma car turned off and did not start for a while.later that day when i started it...the noise became loud and clear.so my question is how much or what parts was needed change
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#12 Old 04-25-2012, 03:04 AM
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my car is making some noises also but it sounds nothing like that video. it sounds more like this @3:26...
or this
more of a random clunk rather than the previous video with sounds like a playing card in a bicycle spoke.
this noise came out of nowhere also and i noticed my turbo got kinda hot as well. i was thinking loose timing belt = retarded timing = too rich = lots of fuel getting to the turbo and making it hot?? pretty sure a rebuild is coming up.
Thoughts?
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#13 Old 04-25-2012, 05:43 AM
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^Oil starvation more than likely.

Paul
2007 XT
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#14 Old 04-25-2012, 11:52 PM
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Quote:
Originally Posted by pzr2874 View Post
^Oil starvation more than likely.
oil level is perfect, and after sitting at idle for about 20 minutes the temp gauge never went above normal. but when i drove it just a couple houses down the turbo itself started to smoke. it could have been coolant steam if it was starving for oil and got hot under a load .do you think a bad oil pump would still show good level on the stick? how do you test the oil pump anyway? i'm about to have the front torn down to replace the timing belt tensioner and check everything else up there.
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#15 Old 04-27-2012, 05:58 AM
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What color was the smoke?

If anything look at your turbo/wheel.

Paul
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