The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #1  
Old 10-29-2007, 11:15 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
svx sounds diesel

when i listen under the car near the belts and oil pan there is a loud knocking and it almost sounds like its diesel.... is this normal??
Reply With Quote
  #2  
Old 10-30-2007, 05:20 AM
wawazat??'s Avatar
wawazat?? wawazat?? is offline
Yeah, I'm still around
 
Join Date: Aug 2001
Location: Beverly Hills, MI
Posts: 3,770
No its not normal.
__________________
Down to none
Reply With Quote
  #3  
Old 04-20-2013, 09:50 AM
theflystyle's Avatar
theflystyle theflystyle is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Jul 2008
Location: Fulton, MD
Posts: 781
Registered SVX
Re: svx sounds diesel

yes i know, an old thread bump....

i was looking to see if anyone else had a svx that sounded like a diesel when it was running. keep in mind this is my first svx but not my first boxer engine (H4 or H6) so i know what they typically sound like. comparing it to the videos on youtube i cant what is causing mine to sound as loud as it does.

here are some of the ones i found to compare

Idle video 1

idle video 2

i plan on taking a video of mine and posting it up here
__________________
1994 SVX LSi
JDM Tailbar and Grill, Clear Corners, 15min-mod, Nevin Blue RSB, G-FORCE SPORT COMP-2 Tires, Phenolic Spacers (Manifold & Throttle Body), SS Brake Lines, Maniac Electric Motors 160A Alternator
2008 Legacy 3.0R
Reply With Quote
  #4  
Old 04-20-2013, 01:05 PM
jetboy's Avatar
jetboy jetboy is offline
Very Terrific Driver
 
Join Date: Oct 2011
Location: Norway, way of Jupiter
Posts: 626
Registered SVX
Re: svx sounds diesel

Mine sounds a little dieslish now. Mainly due to neglect, hope it will be creamy smooth again when the engine is pulled and overhauled.
__________________
I got my girl,
I got my glass,
I got my car and
I'm ready to f...
Reply With Quote
  #5  
Old 04-20-2013, 02:28 PM
Jake@FAPFab's Avatar
Jake@FAPFab Jake@FAPFab is offline
11.24:1 E85
 
Join Date: Jan 2011
Location: USA
Posts: 89
Re: svx sounds diesel

the loud deep thumping is rod bearings that are quite worn from neglect slamming about...
Reply With Quote
  #6  
Old 04-20-2013, 05:08 PM
bishop bishop is offline
Registered User
 
Join Date: Jun 2012
Location: Aumsville, OR
Posts: 354
Registered SVX
Re: svx sounds diesel

I agree with Jake that its rod bearings but I also think its an oiling problem because my car only does it sometimes.
__________________
1992 SVX Pearlie: AmsOil signature synthetic 10w40 and Ea15k20 filter, Cobb crank pulley, Outlaw Engineering spacers and tb bypass, LGT 5spd, Slotted Crossdrilled rotors and ceramic pads, 11:1 compression, EGR delete, Port & Polished heads, SaikoMichi catch can, A/c delete.
Reply With Quote
  #7  
Old 04-21-2013, 08:23 AM
theflystyle's Avatar
theflystyle theflystyle is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Jul 2008
Location: Fulton, MD
Posts: 781
Registered SVX
Re: svx sounds diesel

PO used mobile one synthetic 5w-30 and I followed with that since ive had the car. i dont recall a difference in the loudness after any changes however
__________________
1994 SVX LSi
JDM Tailbar and Grill, Clear Corners, 15min-mod, Nevin Blue RSB, G-FORCE SPORT COMP-2 Tires, Phenolic Spacers (Manifold & Throttle Body), SS Brake Lines, Maniac Electric Motors 160A Alternator
2008 Legacy 3.0R
Reply With Quote
  #8  
Old 04-21-2013, 05:19 PM
oab_au oab_au is offline
Registered User
Subaru Gold Contributor
 
Join Date: Mar 2001
Location: Coffs Harb, Australia.
Posts: 5,032
Significant Technical Input Registered SVX
Re: svx sounds diesel

The harmonic balancer will make a loud knocking sound if it is not tight.

Harvey.
__________________
One Arm Bloke.
Tell it like it is!

95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels.
97 Liberty GX Auto sedan. 320,000Kls.
04 Liberty 30R Auto Premium. 92.000kls.
Reply With Quote
  #9  
Old 04-22-2013, 02:13 PM
jetboy's Avatar
jetboy jetboy is offline
Very Terrific Driver
 
Join Date: Oct 2011
Location: Norway, way of Jupiter
Posts: 626
Registered SVX
Re: svx sounds diesel

I personally don't have anything I would call a rocking sound. Just a bit farm machinery like when I start up.
__________________
I got my girl,
I got my glass,
I got my car and
I'm ready to f...
Reply With Quote
  #10  
Old 04-26-2013, 12:42 PM
theflystyle's Avatar
theflystyle theflystyle is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Jul 2008
Location: Fulton, MD
Posts: 781
Registered SVX
Re: svx sounds diesel

As promised, albeit a little late, the a video clip of my sound.

__________________
1994 SVX LSi
JDM Tailbar and Grill, Clear Corners, 15min-mod, Nevin Blue RSB, G-FORCE SPORT COMP-2 Tires, Phenolic Spacers (Manifold & Throttle Body), SS Brake Lines, Maniac Electric Motors 160A Alternator
2008 Legacy 3.0R
Reply With Quote
  #11  
Old 04-26-2013, 01:48 PM
bishop bishop is offline
Registered User
 
Join Date: Jun 2012
Location: Aumsville, OR
Posts: 354
Registered SVX
Re: svx sounds diesel

wow, that is much different than i imagined. Im torn though because something on that engine is messed up but at the same time diesel rumble is kinda cool.

Pull the timing covers, i wonder if theres a pulley in there thats going bad and rubbing something.
__________________
1992 SVX Pearlie: AmsOil signature synthetic 10w40 and Ea15k20 filter, Cobb crank pulley, Outlaw Engineering spacers and tb bypass, LGT 5spd, Slotted Crossdrilled rotors and ceramic pads, 11:1 compression, EGR delete, Port & Polished heads, SaikoMichi catch can, A/c delete.
Reply With Quote
  #12  
Old 04-26-2013, 03:12 PM
theflystyle's Avatar
theflystyle theflystyle is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Jul 2008
Location: Fulton, MD
Posts: 781
Registered SVX
Re: svx sounds diesel

i would take a nice purr over that noise. the driver side timing cover is already somewhat cracked at the screw so who knows what it looks like back there.
__________________
1994 SVX LSi
JDM Tailbar and Grill, Clear Corners, 15min-mod, Nevin Blue RSB, G-FORCE SPORT COMP-2 Tires, Phenolic Spacers (Manifold & Throttle Body), SS Brake Lines, Maniac Electric Motors 160A Alternator
2008 Legacy 3.0R
Reply With Quote
  #13  
Old 04-30-2013, 12:27 PM
Tapani Tapani is offline
Registered User
 
Join Date: Feb 2010
Location: Finland
Posts: 815
Registered SVX
Re: svx sounds diesel

I just tried to listen very carefully mine. With an engineers stethoscope and w/o. Then did the same for the 2006 3.0R Outback. What a difference.

The 3.0R is silky smooth - there's not much anything but a constant whizz even with the stethoscope.... by far the loudest part is the power steering pump.

The EG33 sounds "harsh", not "wrong" to the ear - I can hear the individual injectors tick and some general rumble. With the stethoscope there's a whole cacophony of mechanical clicketi-clack... slight in the head castings, some more from the block... by far the loudest at the cylinder #6 (drivers side, rear) - right where the piston/cylinder is - a bit less at the block split joint. Very, very different from the EZ30R.

I need to replace my head gaskets and I am trying to decide whether to do the rod bearings while engine is out. Removing the pistons is a PITA and splitting the casings does expand the project quite a bit. 130kmiles, 5PSI turbo charged.

I have ever heard only one other SVX engine running and it did appear to run smoother on idle. Didn't pay much attention, though.

theflystyle: There are two different type sounds in yours... like a diesel injector/combustion sound - and then a single much lower knock - big end, burned valve?

Did you have your AC compressor running in the video?

Hmmm.....

Tapani

Last edited by Tapani; 04-30-2013 at 12:30 PM.
Reply With Quote
  #14  
Old 04-30-2013, 05:17 PM
theflystyle's Avatar
theflystyle theflystyle is offline
Registered User
Subaru Bronze Contributor
 
Join Date: Jul 2008
Location: Fulton, MD
Posts: 781
Registered SVX
Re: svx sounds diesel

^ I fully agree with your comparison to the 3.0R. Night and day difference, sometimes I cant even tell its running at idle.

I did not have the AC running in the video, and that was after a 30 minute drive so the car was nice and warm. I am still getting some small drips of oil even after changing the valve covers. The headgasket was also recently changed and is not dripping as well. Its coming from further back
__________________
1994 SVX LSi
JDM Tailbar and Grill, Clear Corners, 15min-mod, Nevin Blue RSB, G-FORCE SPORT COMP-2 Tires, Phenolic Spacers (Manifold & Throttle Body), SS Brake Lines, Maniac Electric Motors 160A Alternator
2008 Legacy 3.0R
Reply With Quote
  #15  
Old 04-25-2019, 03:55 PM
Huskymaniac's Avatar
Huskymaniac Huskymaniac is offline
Uses the ignore feature
 
Join Date: Jul 2010
Location: Corning, NY
Posts: 1,872
Registered SVX
Re: svx sounds diesel

Quote:
Originally Posted by theflystyle View Post
^ I fully agree with your comparison to the 3.0R. Night and day difference, sometimes I cant even tell its running at idle.

I did not have the AC running in the video, and that was after a 30 minute drive so the car was nice and warm. I am still getting some small drips of oil even after changing the valve covers. The headgasket was also recently changed and is not dripping as well. Its coming from further back
Mine sounds like that too after the headgaskets job. What did it turn out to be?
__________________
Tony

1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads
2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil
2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil
1992 Red Ferrari 348 ts, 82,XXX, Redline everything
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 09:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122