Subaru Guru's Diag My Engine Noise. Ryan, Ray, ralph, etc! VIDEO INSIDE! - TriStateTuners.com :: Home of Tristate Auto Enthusiast

teh DIRT · 05-28-2009, 05:23 PM

dudes. in florida with my car, which about two weeks ago started making a knocking noise after starting it one time. Been doing it ever since, sometimes its loud, sometimes its quiet. Sometimes it doesn't do it at all.

Oil pressures seem normal, 30-40psi hot idle, 70-90 cruising. Same as they have been since day one. Changed the oil a few days after the noise first occured, didn't see any excessive metalic particles. I have put over 500 miles on the engine since the noise started, engine doesn't miss a beat.

Noise is most clearly heard when placing a 20 inch screwdriver onto pass side cylinder head, right above cylinder one, right behind timing cover.

at first i thought piston slap, which would be odd to just appear out of nowhere. Now that i localized the sound, i am confused. Could a brokem spring/bucket do this?

here's a vid of hte noise, let me know what you think. In the last second of the video, the noise dissapears altogether. so odd.

http://www.youtube.com/watch?v=_XUZH...e=channel_page

teh DIRT · 05-28-2009, 05:25 PM

specs:

2004 ej205 block (used)
stock pistons (used)
stock rods (used)
stock valves/springs/retainers
STi Camshafts (modded to delete the AVCS ports)
ACL bearings
Stock used crank
Gates timing belt

all specs were within tolerance when engine was built. mains 1-1.2 thou, rods 1.5-1.6 thou

77F-150 · 05-28-2009, 05:47 PM

sounds like a valve to me.

teh DIRT · 05-28-2009, 05:48 PM

a valve doing what? bent?

teh DIRT · 05-28-2009, 07:12 PM

bumP!

RayArroyo · 05-28-2009, 07:24 PM

pete, it deffinatley sounds like something on the head, is the car missing at all?

RyanG · 05-28-2009, 07:25 PM

Im going with broken vavle spring.

teh DIRT · 05-28-2009, 07:29 PM

does not seem to be missing at all. I mean look at the vid, no shaking/stumbling. No CELs either.

I need to find somewhere where i can pull the valve cover off.

valve spring would cause a running issue i think, but def a possibility.

RyanG · 05-28-2009, 07:46 PM

I would think it wouldn't cause a running issue. But stranger things have happened. Shimless buckets??

teh DIRT · 05-28-2009, 07:50 PM

yup, shimless. That would have been my first guess if they were shimmed buckets. Im thinking MAYBE timing belt tensioner failed, causing valve to hit piston at times?

teh DIRT · 05-28-2009, 07:57 PM

also interesting is this situation.

when assembling the heads, one bucket would not drop in nicely. I ended up getting it in, but it didnt move as freely as i liked. So i replaced it. replacement bucket worked fine. I was confused as to why ONE bucket that was stored in the same place as the rest, was faulty.

here is a video of it stuck in place before i got it out. Really cant recall which valve it was for, but from looking at the video, id say its intake valve 1 on cyl 1. Which is where the noise is loudest...hrmm..

http://www.youtube.com/watch?v=nCzUJ...e=channel_page

RyanG · 05-28-2009, 08:22 PM

def weird. I've had stuck buckets before also but they have always came out and felt fine after cleaning. I use a valve lapping tool to pull them out.

possible the lobe is smacking a stuck bucket???

**TROLL** · 05-28-2009, 08:24 PM

I hope its simple... do you have to pull the motor to get a valvecover off and actually see anything?

teh DIRT · 05-28-2009, 08:25 PM

possible. problem is i can run the engine with that cover off without making a HUGE mess. damn subies.

edit: bryan, no i can pull the valve cover off with engine in car.

teh DIRT · 06-01-2009, 03:36 PM

not a rod bearing noise.

not a main bearing noise.

not piston slap.

not timing belt tensioner.

not wrist pin.

who wants to guess what it is?

video to come.....

(btw i figured it out,

)

RyanG · 06-01-2009, 04:19 PM

if you are saying it like that its gotta be something stupid haha..

or we figured it out already

OMGz Turbo · 06-01-2009, 04:40 PM

Pete i have no idea...i would have said something let loose in the hood or a bolt got sucked up

teh DIRT · 06-01-2009, 04:57 PM

http://www.youtube.com/watch?v=36IgeyDtZb4

head is probably trashed, but im happy to have solved the mystery. knew it wasnt bottom end, stupid nasioc people.

RyanG · 06-01-2009, 05:08 PM

I knew it wasn't the bottom end.. thats a wobble mcgee right there dude. If you need caps I have tons

teh DIRT · 06-01-2009, 05:11 PM

im probly still getting rid of the car unfortunately. even know that i know the issue, i still dont have the money or place to fix it.

05-28-2009, 07:24 PM	#6
RayArroyo Tri-State Post Whore Join Date: Mar 2005 Location: ALBANY/PHILLY Member #205 My Ride: GTR/RSTI/MDX Sport iTrader: (3)	pete, it deffinatley sounds like something on the head, is the car missing at all? __________________ formerly ray@turbotek

05-28-2009, 07:25 PM	#7
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	Im going with broken vavle spring. __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

05-28-2009, 07:46 PM	#9
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	I would think it wouldn't cause a running issue. But stranger things have happened. Shimless buckets?? __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

05-28-2009, 08:22 PM	#12
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	def weird. I've had stuck buckets before also but they have always came out and felt fine after cleaning. I use a valve lapping tool to pull them out. possible the lobe is smacking a stuck bucket??? __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

06-01-2009, 04:19 PM	#16
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	if you are saying it like that its gotta be something stupid haha.. or we figured it out already __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

05-28-2009, 05:47 PM	#3
77F-150 Tri-State Aficionado Join Date: Mar 2005 Location: Morrisville, Pa. Member #280 My Ride: 1977 F-150: 1995 Civic CX: 1985 Nighthawk CB700SC iTrader: (0)	sounds like a valve to me.

06-01-2009, 04:40 PM	#17
OMGz Turbo Tri-State Post Whore Join Date: Dec 2006 Location: Ltown Member #3108 My Ride: 01' WS6..That whistles...01' Explorer 5.slow iTrader: (0)	Pete i have no idea...i would have said something let loose in the hood or a bolt got sucked up __________________ loading HATERS.....99% ████████████████] NO ONE CARES ABOUT BEING TTT APPROVED

06-01-2009, 05:08 PM	#19
RyanG Tri-State Post Whore Join Date: Jan 2005 Location: Easton, PA Member #63 iTrader: (1)	I knew it wasn't the bottom end.. thats a wobble mcgee right there dude. If you need caps I have tons __________________ I am Area1320 To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

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