Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 06-08-2010, 03:41 PM   #1
Registered User
 
Join Date: Sep 2006
Location: so cal
Posts: 202
Symptoms of AOS?

What are the symtoms for a bad AOS? Does it fail over time or does it just fail immediately?

thanks
silverboxter is offline   Reply With Quote
Old 06-08-2010, 04:17 PM   #2
Registered User
 
Join Date: Dec 2006
Location: Santa Barbara, CA
Posts: 308
my car's AOS came on light turning a light switch. maybe there were tell tail sign but I was not aware of it.
sharp right turn on a freeway on ramp started a white smoke like crop duster.
50+ feet high with equal width.
thought the head gasket blew.
01 boxster 5 speed (non-S)
sb01box is offline   Reply With Quote
Old 06-08-2010, 04:32 PM   #3
Registered User
 
Join Date: Sep 2006
Location: so cal
Posts: 202
sb01box-

kinda sounds like what happened to me. going from a stoplight i saw a cloud of smoke. i thought it was the bus next to me but it wasn't. i kept going and it got better...then, in less than a mile it got worse. the cel came on and the engine turned off. luckily, it was just before i got on the freeway. i coasted to a strip mall and parked. i noticed that there was oil coming out of the tailpipe.

what did it cost to repair your box? did you have to change out the O2 sensors?
silverboxter is offline   Reply With Quote
Old 06-08-2010, 05:15 PM   #4
Registered User
 
tonycarreon's Avatar
 
Join Date: May 2009
Location: Frederick, MD
Posts: 1,396
http://www.youtube.com/watch?v=CkQ8xFDDAxY
__________________
"Speed has never killed anyone, suddenly becoming stationary... that's what gets you."
tonycarreon is offline   Reply With Quote
Old 06-08-2010, 07:00 PM   #5
Registered User
 
Join Date: Mar 2005
Location: utah
Posts: 96
Mine started making a squealing sound while at idle anytime else was silent. almost sounded like when a car is low on power steering fluid. $300 later at the dealer turned out to be the AOS.
boxster7614 is offline   Reply With Quote
Old 06-08-2010, 07:23 PM   #6
Registered User
 
Join Date: Dec 2006
Location: Santa Barbara, CA
Posts: 308
Quote:
Originally Posted by silverboxter
sb01box-

kinda sounds like what happened to me. going from a stoplight i saw a cloud of smoke. i thought it was the bus next to me but it wasn't. i kept going and it got better...then, in less than a mile it got worse. the cel came on and the engine turned off. luckily, it was just before i got on the freeway. i coasted to a strip mall and parked. i noticed that there was oil coming out of the tailpipe.

what did it cost to repair your box? did you have to change out the O2 sensors?
no O2 sensor replacement. oil came out of the drain opening at the air filter box but none from the exhaust.
total of 1-1/2 quarts went up in smoke.
cost was with 90K service and keyfob. 2200 at local dealer. don't recall the breakdown but about 400 for AOS I think.
sb01box is offline   Reply With Quote
Old 06-08-2010, 07:41 PM   #7
Registered User
 
Join Date: Apr 2007
Location: Bay Area
Posts: 524
Mine started with running a little rough during cold start which progressed on each start. Ran fine once the engine was warm. Then periodic smoke at start up. If I drove the car hard you would see a cloud of smoke behind you.
__________________
2008 Boxster S PDE2
02 Boxster S Blk on Blk(Stock for the Wife)
88 turbo S (My Toy) slightly modified
cas951 is offline   Reply With Quote
Old 06-09-2010, 04:32 AM   #8
Registered User
 
jcb986's Avatar
 
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
The most common failures are, white smoke coming out the exhaust and the engine running rough from the oil or the engine front will have a squeal coming out of the seal around the front of the crankshaft and this is usually is after the engine has warmed up. Also, you cannot easily remove the oil filler cap when the engine is running. A new AOS comes with the seal and boot for about $115. It takes about 2 hours. Failure of this part is common. I replaced mine and the top J-tube, left the bottom as is. Search here for AOS repair...there is one that goes step-by-step. also, here is Mike's DIY.

http://sites.google.com/site/mikefocke2/mikesporscheboxsterwebpages
__________________
http://i768.photobucket.com/albums/x...6/PC120055.jpg

Old Hippie Young Heart
2000 S/3.2 Liter/Tiptronic/Boxster S Sport Package/Cruise Control/Slate Grey Metallic
Red Special Leather Interior/Red Floor Mats/Red Hand Painted Instrument Dials/Roll Bar/Windstop
Small Carbon Package/Leather Wrap Carbon Wheel/Center Console Exterior Color/Alum Carbon Shift Knob
AM/FM Radio w/CD Player & Changer/Digital Sound Package/18" Turbo Wheels/Wheel Caps w/Colored Crest
jcb986 is offline   Reply With Quote
Old 06-09-2010, 04:58 AM   #9
Registered User
 
Join Date: May 2008
Location: Toronto
Posts: 2,655
Anybody bother to install the motorsport version?

http://www.****************************************************.com/product/9XXSEP.html?Category_Code=986sport
ekam is offline   Reply With Quote
Old 06-09-2010, 07:46 PM   #10
Registered User
 
Join Date: Sep 2006
Location: so cal
Posts: 202
Just got the call. O2's need to be replaced...pricey! I'll keep you informed. Now I'm a little paranoid. My wife's '02S had some smoke at start up. It only has 30k miles. hmmmm
silverboxter is offline   Reply With Quote
Old 06-10-2010, 07:37 PM   #11
Registered User
 
Join Date: May 2006
Location: Toronto
Posts: 277
Quote:
Originally Posted by silverboxter
Just got the call. O2's need to be replaced...pricey! I'll keep you informed. Now I'm a little paranoid. My wife's '02S had some smoke at start up. It only has 30k miles. hmmmm
They are attributing the smoke to the O2 sensors alone, then?
wanna986 is offline   Reply With Quote
Old 06-13-2010, 12:00 PM   #12
Registered User
 
Join Date: Sep 2006
Location: so cal
Posts: 202
Got her back Thursday.
AOS
new plugs
4 O2 sensors
(MAF not needed)
$2k

Glad to have her back. My advice: If you suspect that your AOS is failing, get it changed out. You could save yourself $1200 in O2 sensors. Just my 2 cents. ; )
silverboxter is offline   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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 09:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page