05-20-2014, 12:38 AM
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#1
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Registered User
Join Date: Jan 2011
Location: Peoples Republic of Kaliforneea
Posts: 686
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Quote:
Originally Posted by jotoole
On my second 04 version coolant cap. Caps seemed fine, just replaced them hoping to eliminate condensation.
Have always had condensation. No loss of coolant or overheating, except when water pump fails.
And I'm on my fourth water pump. Worn impellers each time.
100,000 mi 2000 base.
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Yikes! 4 water pumps in 100k miles? How did you know water pump failed each time, did you wait for it to overheat, or trail of coolant leaking under the car?
I am on my original water pump with 80k miles, 02 base.
Thanks.
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02 Boxster (DD sans kids)
03 Dodge Ram Quad Cab (Stuff hauler)
06 Maserati Coupe Cambiocorsa (Personal weekend car)
06 Maserati Quattroporte (Family hauler)
08 Corvette Z06 (Track car)
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05-18-2014, 06:07 AM
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#2
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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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Had condensation over the cap area. Swapped cap a year back. Blue one. No condensation since.
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'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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05-20-2014, 05:07 AM
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#3
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Registered User
Join Date: Jan 2014
Location: Oklahoma
Posts: 83
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2002 w/80K...Original Cap
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05-20-2014, 07:42 AM
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#4
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Registered User
Join Date: Mar 2014
Location: Austin
Posts: 314
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Replaced mine at 95k with water pump (which was beginning to leak) and coolant.
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2003 S, 6 Speed, PCM, PSM, Bose, Litronics with washers, on its' second LN IMSB, comfort top, UDP, 987 engine mount, 997 RMS, Koni Sport Shocks, H&R springs, Techno brace, comfort blinkers, nin8six windscreen, particlewave light up cubby
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05-20-2014, 09:06 AM
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#5
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Registered User
Join Date: Jun 2013
Location: Socal
Posts: 560
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03 Boxster 2.7 tip .
142k on original 02 cap
09 carrera 4s pdk .
65k on original 03 cap
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05-20-2014, 10:40 PM
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#6
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Registered User
Join Date: Apr 2012
Location: West Chester, OH
Posts: 52
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Glad this thread was refreshed - after putting down my beverage I took a stroll out to the garage and noticed that my cap was an .01 part number. For a minute I was impressed that I have 88K miles on my '98 Boxster and I'm still on the original cap...then I started to recall that there was some work done on the system by the previous owner....
So that got me looking through the maintenance records I received with the car. Sure enough - in 2005 with 36K miles the reservoir was replaced and a new cap was included.
What I find odd is the service record has the new cap as having the part number of .04....and I somehow have a cap with an .01 part number?? Did they have the .04 cap in 2005?
Regardless - even if the cap was replaced a 2nd time with an original .01 part number cap...I will now be ordering the .04 cap...
Last edited by SpikeJr; 05-20-2014 at 10:44 PM.
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05-21-2014, 07:27 AM
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#7
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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Quote:
Originally Posted by SpikeJr
Regardless - even if the cap was replaced a 2nd time with an original .01 part number cap...I will now be ordering the .04 cap...
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Smart. Our resident mechanic says his shop toss any that don't hold a minimum presure of 18 PSIG if I recall. Seems to me that if you flush as a DIY without vac fill and have a cap not holding enough pressure you'll like split the original coolant tank via trapped air or worse you'll bake up a fresh batch of hot pockets and burn your tongue.
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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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05-21-2014, 07:30 AM
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#8
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Registered User
Join Date: Jun 2013
Location: Socal
Posts: 560
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Will they be the philly cheese steak variety ?
They're my favorite 
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05-21-2014, 11:06 AM
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#9
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Registered User
Join Date: May 2008
Location: Toronto
Posts: 2,656
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Quote:
Originally Posted by Perfectlap
Smart. Our resident mechanic says his shop toss any that don't hold a minimum presure of 18 PSIG if I recall. Seems to me that if you flush as a DIY without vac fill and have a cap not holding enough pressure you'll like split the original coolant tank via trapped air or worse you'll bake up a fresh batch of hot pockets and burn your tongue.
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Heard the same from the dealer parts guy as well. It's a cheap part and no reason why you shouldn't update it to the latest one if you have an original from way back.
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05-21-2014, 07:34 AM
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#10
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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__________________
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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05-21-2014, 07:55 AM
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#11
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Registered User
Join Date: Jun 2013
Location: Socal
Posts: 560
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They're awesome !!
The sleeve can be used as a fancy iPhone holder .
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06-29-2015, 09:57 AM
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#12
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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bump..... bump
__________________
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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06-29-2015, 05:07 PM
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#13
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Registered User
Join Date: Jan 2014
Location: Albuquerque, NM, USA
Posts: 746
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04 means 5th version.
I'm on my 2nd new version, as first was bad.
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Kent Christensen
Albuquerque
2001 Boxster
2007 GL320 CDI, 2010 CL550
2 BMW motorcycles
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06-29-2015, 05:43 PM
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#14
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Registered User
Join Date: Sep 2014
Location: Canada
Posts: 93
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At 133K km (about 83K miles), my 2001 Boxster S has had the waterpump replaced at least twice, I just replaced the reservoir tank, but I'm still on the original cap (I keep forgetting to order a new one). So far no issues with this cap.
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06-30-2015, 08:58 AM
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#15
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Registered User
Join Date: Nov 2004
Location: New Jersey
Posts: 8,709
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^ If you removed that old cap more than a few times it's probably holding less pressure each time than if you left it alone.
Some of our professional mechanics here say it needs to be at least 18 PSIG or they are tossed.
That's tough to tell from merely a visual inspection.
__________________
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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06-30-2015, 12:08 PM
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#16
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2003 S, Arctic Silver, M6
Join Date: Oct 2014
Location: Winnipeg, MB, Canada
Posts: 1,346
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Weird timing on this poll. I just replaced mine yesterday with the latest one. The original was still on there but with no problems.
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07-01-2015, 04:01 AM
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#17
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Registered User
Join Date: Feb 2013
Location: Cranston RI
Posts: 902
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replaced mine at 83k
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99 Porsche Boxster
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07-01-2015, 04:08 AM
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#18
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Registered User
Join Date: Dec 2012
Location: FL
Posts: 4,144
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I replaced mine with the .04 when I did my WP/Thermostat in January 2015. I think I had the .01 cap on there before with no problems.
Steve
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07-01-2015, 05:20 AM
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#19
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Toppy
Join Date: Apr 2014
Location: Dorchester, ON, Canada
Posts: 142
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Just replaced with the 04, still had the original one with no problems
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1999 Boxster
Arena Red/Graphite Grey Interior/Black 03 Top/550 All Red Tail Lights
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07-01-2015, 02:17 PM
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#20
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Registered User
Join Date: May 2013
Location: Oklahoma City
Posts: 856
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Car #1: original cap, 98,000 miles
Car #2: original cap, 141,000 miles.
Car #2 has had a mysterious slow loss of coolant since I've had it, even though no one has ever been able to find a leak, or any evidence of one. Rear trunk always hot as a campfire inside.
Wonder if the escaping steam theory applies here? Time to replace and observe.
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