11-19-2013, 04:48 PM
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#1
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Registered User
Join Date: Sep 2013
Posts: 140
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ideas on an interesting sound?
folks,
ive noticed an interesting sound coming from the rear passenger side (while standing outside) near the rear vent in front of the rear wheel.
Its like a rata-tat-tat-tat .. type of sound. For those of you who've been driving for 30 years .... it sounds a bit like the sound of a carburetor in older cars!!
my boxster surely isnt from 1980 ... 
any ideas?
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11-19-2013, 05:20 PM
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#2
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Registered User
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
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There is a cooling fan behind the vent...sounds like it is hitting something. When the engine is first started from sitting overnite, do hear hear that sound. Fan will not come on until temperature reaches a certain degree for it to engage.
__________________
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
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11-19-2013, 09:23 PM
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#3
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Registered User
Join Date: Sep 2013
Posts: 140
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thanks for ur input.
its not the fan ... cos after engine off .... sometimes the fan stays on (to cool engine) .. and the sound stops ... while the fan is still on.
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11-20-2013, 03:54 PM
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#4
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Registered User
Join Date: Aug 2009
Posts: 1,466
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the vacuum pump
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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11-20-2013, 05:11 PM
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#5
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Registered User
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
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Could be the pump...check the plugs.
__________________
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
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11-20-2013, 07:06 PM
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#6
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Registered User
Join Date: Sep 2013
Posts: 140
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anyone have the part number or picture of the "vacuum pump"?
i cant find it on pelicans website.
in fact when i search on the forum for "leaks / vacuum" etc ... everyone seems to use different nomenclature for what part is actually leaking or failing.
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11-21-2013, 03:31 PM
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#7
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Registered User
Join Date: Aug 2009
Posts: 1,466
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2000 -2004 99660510400
1999 98662410400
1998 98662410301
1997 98662410300
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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11-23-2013, 01:57 AM
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#8
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Registered User
Join Date: Sep 2013
Posts: 140
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So the air injection pump is located near the cooling fan behind the passenger rear vent?
Is it hard to get to? Topside via engine cover or bottom side thru wheel well?
is there anyway to diagnose the fault definitively before actually replacing the part?
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11-23-2013, 04:19 AM
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#9
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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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Get a nice mechanics stethoscope.
Does the noise change with engine RPM?
__________________
'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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11-23-2013, 04:23 AM
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#10
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Registered User
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
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Top right behind passenger seat, check out pic.
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11-24-2013, 06:09 AM
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#11
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Registered User
Join Date: Sep 2013
Posts: 140
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well .. found out what the sound was ... (sorta)...
today as I was driving the box ... the engine belt broke (I think thats what it was). The moment it broke .. the engine was purring like a kitten as if it was brand new! 
so had it towed to my frds shop. its closed today, so will check it out tomorrow with him.
basically what happened .... was driving along .. sound got a bit louder ....
then the sound went away! ..... the battery light came on ... and my AC wasnt cold anymore. Then 5 secs later .... the temp shot up to the top.
the only thing that I believe can cause these 3 conditions at the same time (alternator, AC compressor and water pump) is the engine belt or drive belt or serpentine belt.. whatever u guys choose to call it. cos its the only belt that links all 3 things.
hopefully ... things are ok and the overheat condition wasnt serious.
update u guys later!
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11-24-2013, 06:41 AM
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#12
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Registered User
Join Date: Apr 2009
Location: Orlando
Posts: 1,266
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Great, because that is an easy fix.:dance:
__________________
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
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