Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 01-07-2015, 12:00 PM   #1
Registered User
 
Join Date: Jan 2015
Location: London
Posts: 14
Water pump replaced, still loosing coolant

I picked up a 2000 2.7 986 Boxster a few months ago, its been a great car bar the fact it slowly looses coolant. I took it to a local garage that I know well, they diagnosed that the water pump needed replacing and did so. However it is still loosing coolant, albeit slightly slower. It is booked back in, in a few days with this garage but I wanted to do some research of my own first.

It looses about 1cm on the meter on the side of the expansion tank in the rear boot over the space of about a month. The rear boot stinks of coolant after the car has warmed up and you can smell it sometimes if you drive with the windows or roof down too.

I pulled away the carpet to check for an expansion tank leak, but was all bone dry and seemed fine. I do have some condensation above the expansion tank on the inside of the boot lid? I wondered if this was normal or maybe the lid isn't sealing properly? Other than this im really hoping its not the head gasket or something bad like that....

Thank you for any suggestions.
eliot92 is offline   Reply With Quote
Old 01-08-2015, 12:54 PM   #2
Registered User
 
Steve Tinker's Avatar
 
Join Date: Dec 2008
Location: Queensland, Australia
Posts: 1,522
If you have condensation on the boot lid there is a good chance your expansion tank screwon filler cap seal has gone. The latest filler cap part number from Porsche ends on xxxx04 (blue in colour) - you may find your cap part number ends with xxx01.
Go to your nearest Porsche dealer or try www.design911.com and buy a new one.
__________________
2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
Steve Tinker is offline   Reply With Quote
Old 01-08-2015, 01:16 PM   #3
still plays with cars...
 
BoxsterSteve's Avatar
 
Join Date: May 2011
Location: Baden, ON, Canada
Posts: 1,069
Garage
Another possibility...

That or the vacuum break bail needs replacement. Do a forum search, it's been posted here as a DIY.
__________________
Six speed 2000 Boxster S
Arctic Silver on Metropol Blue | Arctic Silver console, spoiler frame & bumperettes | Crios mod | Technobrace | RoboTop module & modified convertible top relay for one-touch roof operation
BoxsterSteve is offline   Reply With Quote
Old 01-08-2015, 08:24 PM   #4
Registered User
 
Ckrikos's Avatar
 
Join Date: Sep 2002
Location: Northern NJ
Posts: 633
Also remove your bumper and check your radiators (they leak from the end tanks). I think it not as common on the 986 but they go bad on the 996tt at this age. The radiators would also make sense that you are losing the coolant slowly with no boil overs.

Rather than change the top of the coolant tank, just replace the entire thing. I made mine worse when I had a similar problem by changing out the bleeder valve gaskets. If it's not a lot of condensation don't worry about it. I hated the boxster coolant system. TT's have problems too though, just not as difficult to diagnose.
__________________
LB/GG/MB 02 2.7 sold
MB/GG 02 996TT

Last edited by Ckrikos; 01-09-2015 at 07:22 AM.
Ckrikos is offline   Reply With Quote
Old 01-08-2015, 09:00 PM   #5
Registered User
 
Join Date: Sep 2013
Posts: 140
i started to loose coolant because one of the metal joints along the coolant pipe started to break apart (just near right rear wheel)
BTfd2e93 is offline   Reply With Quote
Old 01-09-2015, 10:53 AM   #6
Registered User
 
woodsman's Avatar
 
Join Date: Feb 2013
Location: Land of naught
Posts: 1,302
And while you have the cap off remove the oil cap and pry up the plastic cover panel and make sure the bleeder valve is CLOSED- that is, that it is folded over to the side. This is used to bleed air out of the system and someone may have forgot it in the open position.
__________________
Death is certain, life is not.
woodsman is offline   Reply With Quote
Old 01-09-2015, 03:12 PM   #7
Beginner
 
Jamesp's Avatar
 
Join Date: Mar 2013
Location: Houston
Posts: 1,659
Garage
If you've condensation in the trunk, a good bet would be to replace everything associated with the cooling system in the trunk. That way everything that has failed, or is likely to fail soon, is out of the picture, and not going to bite you.
__________________
2003 S manual
Jamesp is offline   Reply With Quote
Old 01-10-2015, 06:49 PM   #8
Registered User
 
Spinnaker's Avatar
 
Join Date: Dec 2007
Location: Seattle
Posts: 733
There are O-rings under the bleeder valve that go bad also.
__________________
2000S Ocean Blue Metallic- 116K
3X Water Pump, Clear side markers, Crios Mod, Front engine mount, Flywheel, clutch, RMS, AOS, MAF, serpentine belt, power brake vacuum line, battery, 2X CV boots, Fuel filter, Oil filler tube, 3X ignition switch, 90K service, gas cap
Spinnaker is offline   Reply With Quote
Old 01-19-2015, 03:25 AM   #9
Registered User
 
Join Date: Jan 2015
Location: London
Posts: 14
Thanks for the replies, it seems I do have the latest expansion tank cap already (ending in number 4), but it may be worth buying a new one still as they are fairly cheap. I took it back to the garage and they have checked the radiator and piping again and ran a compression check but can't find any leaks. Still got condensation on the boot lid. I will look into some of the suggestions you guys have listed here, thanks!
eliot92 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 03:18 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