05-06-2015, 02:58 PM
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#1
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Registered User
Join Date: Dec 2012
Location: Jackson Hole, Wyoming
Posts: 800
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Isn't there supposed to be a belt around those pulleys  ?
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05-06-2015, 02:32 PM
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#2
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Registered User
Join Date: Dec 2013
Location: Greenville, S.C.
Posts: 2,670
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05-06-2015, 02:59 PM
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#3
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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I don't think you should use that belt again.........
Have you any idea why it tracked off - the tensioner pulley usually keeps a good tight reign on the belt?
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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05-06-2015, 03:07 PM
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#4
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Registered User
Join Date: Sep 2013
Location: Chandler, AZ
Posts: 1,796
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Good, it's not the IMS. So was it the alternator as suggested by other?
__________________
03 Carrera
02 Boxster S Guards Red, black interior with matching hardtop
89 Carrera 4
89 944 S2
78 911SC
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05-06-2015, 03:08 PM
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#5
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Registered User
Join Date: Dec 2013
Location: Greenville, S.C.
Posts: 2,670
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Quote:
Originally Posted by Steve Tinker
I don't think you should use that belt again.........
Have you any idea why it tracked off - the tensioner pulley usually keeps a good tight reign on the belt?
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It was frayed. And had a tick for a while before finally giving, it likely would have broken if it wasn't for shutting off the engine so quick.
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05-06-2015, 03:18 PM
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#6
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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Quote:
Originally Posted by BIGJake111
It was frayed. And had a tick for a while before finally giving, it likely would have broken if it wasn't for shutting off the engine so quick.
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Check all your idler pulleys & tensioner while the belt is off, they may have caused the belt to track improperly & easy to replace now.
__________________
OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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05-06-2015, 03:20 PM
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#7
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I am my own mechanic....
Join Date: Feb 2013
Location: Salt Lake City, UT
Posts: 3,432
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Sweet. That's great, Jake!
__________________
'04 Boxster S 50 Jahre 550 Spyder Anniversary Special Edition, 851 of 1953, 6-sp, IMS/RMS, GT Metallic silver, cocoa brown leather SOLD to member Broken Linkage.
'08 VW Touareg T-3 wife's car
'13 F150 Super Crew long bed 4x4 w/ Ego Boost
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05-06-2015, 04:55 PM
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#8
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Registered User
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
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On manual transmission cars, the alternator has a free wheel clutch integrated with the pulley. This can seize in a worst case scenario.
A couple of years ago, I heard a slight clicking / rattle sound @ idle which stopped when I ran the engine with the accessory belt removed. I found it was the alternator clutch on its way out - it felt very notchy when turned by hand.
You also need a special splined removal tool to get the clutch off the shaft.
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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05-06-2015, 06:47 PM
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#9
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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Your welcome.
Quote:
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how often does an alternator seize ? I have never seen this happen before ....
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See 100+ M96 powered cars a year and you'll see it often. In the past year I have probably made this call 7-8 times and been right every time.
Guess how I diagnosed this with such little information... It wasn't luck!
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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05-07-2015, 07:10 AM
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#10
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Registered User
Join Date: Jun 2013
Location: Nanaimo, Vancouver Island, British Columbia, Canada
Posts: 906
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Quote:
Originally Posted by Jake Raby
Your welcome.
See 100+ M96 powered cars a year and you'll see it often. In the past year I have probably made this call 7-8 times and been right every time.
Guess how I diagnosed this with such little information... It wasn't luck!
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Good to know, I never realized the 986 has a clutch on the alternator. Every one is quick to blame the ims, now that I think of it even the video I found sounds like a serpentine belt flapping around. I wonder how many mechanics have taken advantage of this.
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05-07-2015, 08:37 AM
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#11
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Registered User
Join Date: Jun 2012
Location: Hernando Beach, Florida
Posts: 444
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So either BIG Jake is really happy right now, or a little down as he already had eyes on his next Boxster!
Glad to hear it was an easy fix.
__________________
2003 Boxster S, 6-spd, Seal Grey/Grey top
Ka is a wheel, and everything is 19
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05-07-2015, 09:20 PM
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#12
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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Quote:
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that these alternators have a clutch
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Not all of them do. The units with a spray clutch seize only in the clockwise direction, the engine can still be rotated counter clockwise when these fail.
I've had cars shipped to me from 2000 miles away that were supposedly failed, and this was all that was wrong with them. I told one guy to remove the belt and try to start the engine; but, he was so convinced that it was blown up that he just sent the car anyway.
I fixed it in 45 minutes and called to tell him that he could save his 20K. he was so blown away that he spent 10K on performance and preventatives while the car was with us.
This failure fools lots of people. I bought a core engine for 500 bucks once, and all that was wrong with it was a failed alternator.
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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05-06-2015, 07:09 PM
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#13
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Registered User
Join Date: Sep 2013
Location: Calgary
Posts: 177
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Nice work Mr. Raby. I have no idea. Worked on more m96s than I have seen on the road in my life? Just guessing!!
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05-06-2015, 08:48 PM
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#14
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Registered User
Join Date: May 2013
Location: Oklahoma City
Posts: 856
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Whew! I never thought a breakdown would be such good news.
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"Remember, I'm pulling for ya! We're all in this together."
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05-07-2015, 01:06 AM
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#15
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Need For Speed
Join Date: Feb 2013
Location: Funville
Posts: 2,112
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Awesome BigJake! Nice call Mr Raby!
__________________
2003 Boxster S
| 987 Air Box | K&N Air Filter | 76mm Intake Pipe| 996 76mm TB | 997 Distribution T | Secondary Cat Delete Pipes | Borla Muffler | NHP 200 Cell Exhaust Headers |
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05-07-2015, 02:44 AM
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#16
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Registered User
Join Date: Dec 2013
Location: Dahlonega , Georgia
Posts: 1,350
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It doesn't surprise me that Jake was able to do this long distance email diagnosis, he has probably seen and duplicated every failure mode on these engines ! Nice call Jake.
__________________
2002 Boxster S Arctic Silver with black top with glass window and black leather interior. Jake Raby 3.6 SS ( the beast ) with IMS Solution. 996 GT3 front bumper , GT3 rocker covers and GT3TEK rear diffuser and Joe Toth composites rear ducktail spoiler .
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05-07-2015, 03:14 AM
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#17
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Registered User
Join Date: Oct 2012
Location: Wake Forest, NC
Posts: 867
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Just my opinion, anyone buying a used Boxster, unless they have documentation showing that the serpentine belt has been changed in the last 10-15K miles, should replace it. Inexpensive, easy to do, and a great way to avoid headaches down the road. I carry a spare belt and a 21mm/24mm open end wrench in the car (along with a few other tools), just in case.
__________________
2000 Boxster S, 6 speed, Sport Package, Litronics, LED tail lights, LNE IMS-B, OBC, Skybreaker wind deflector, Arctic Silver/Graphite Grey
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05-07-2015, 04:02 AM
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#18
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Registered User
Join Date: Jun 2012
Location: Little Switzerland, north carolina
Posts: 551
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Exactly why I have my little emergency bag along with extra belt, relays, etc just in case. It is great that it was a simple fix.
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05-07-2015, 04:10 AM
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#19
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Registered User
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
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Learn something new everyday (Problem is remembering them) that these alternators have a clutch. Makes sense that these can seize if the clutch goes.
So now add Alternator clutch to the preventative maintenance list
Is there a Clutch kit for these?
I did a AC compressor clutch kit on my 03 Jeep liberty, about $90 and a couple hours. So Much cheaper than replacing the Compressor.
So the question here, Did a pulley seize or was it a worn belt that jumped the pulleys?
+1 on extras - long trips I carry my old Belt and the tools to change it
__________________
2002 S - old school third pedal
Seal Grey
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05-07-2015, 06:36 AM
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#20
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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a really unscrupulous mechanic could have had a field day.
Three things that are rare...
1. good pizza.
2. loyalty.
3. honest mechanics.
__________________
GT3 Recaro Seats - Boxster Red
GT3 Aero / Carrera 18" 5 spoke / Potenza RE-11
Fabspeed Headers & Noise Maker
BORN: March 2000 - FINLAND
IMS#1 REPLACED: April 2010 - NEW JERSEY -- LNE DUAL ROW
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