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

Reply
 
LinkBack Thread Tools Display Modes
Old 02-21-2018, 10:21 AM   #1
Registered User
 
Join Date: Apr 2013
Posts: 244
Losing a bit of Anti-Freeze

I own a 98 Boxster with 79,000 miles. I ONLY drive it in the summer months (about 4 to 5,000 miles/yr), it never sees rain or snow. A few times during each winter, if the roads are dry and the salt has been washed off the roads I'll take it out for an hour just to run it.

Question...... Once about every two years, the "low coolant light" will blink indicating its coolant level is low. Typically I add only about 1 to 2 cups (never more than 2 cups) of 50/50 anti-freeze and the light goes off for another couple of years (8-10,000 more miles).......IS THAT NORMAL?

I have replaced the coolant cap several years ago, there are no pools or spots of coolant on the garage floor, no moisture or coolant in the trunk and the car runs great and the temps are always within the normal operating range.

Normal? Concerned? Have it looked at? Does coolant evaporate ever?......any thoughts?

Rob175 is offline   Reply With Quote
Old 02-21-2018, 10:49 AM   #2
Registered User
 
p3230's Avatar
 
Join Date: Oct 2015
Location: Rockland Ontario
Posts: 202
Garage
Get a pressure test done on the system to see what is happening.
__________________
Frank
p3230 is offline   Reply With Quote
Old 02-21-2018, 11:01 AM   #3
Registered User
 
kk2002s's Avatar
 
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,218
Garage
System is sealed so you shouldn't lose coolant.
Do you get condensation on trunk lid after driving?
Blinking light low is low. When I got condensation I may have had to add coolant periodically but never lost so much as to get blinking coolant low.

Condensation could be cap leak, purge valve leak or expansion tank crack leak
Then there is everything else associated with the cooling system that could leak.
As mentioned, a pressure test may reveal issue
__________________
2002 S - old school third pedal
Seal Grey
kk2002s is offline   Reply With Quote
Old 02-21-2018, 11:59 AM   #4
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 2,417
Garage
How old is the water pump?
They often fail slowly and a slow leak like yours would be a symptom.
If it's over 5 years, it would be good to replace even if it isn't leaking.
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
78F350 is offline   Reply With Quote
Old 02-21-2018, 12:27 PM   #5
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
The cooling system includes dozens of rubber hoses and spring clamps, wonder what their recommended service life is.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 02-21-2018, 04:04 PM   #6
Registered User
 
Join Date: Jul 2017
Location: Tucson AZ
Posts: 523
Quote:
Originally Posted by Paul View Post
The cooling system includes dozens of rubber hoses and spring clamps, wonder what their recommended service life is.
Day-before-yesterday, and the day-after-tomorrow.
__________________
2001 Boxster
2007 Toyota Highlander
2003 New Beetle Convertible, Turbo, Tip 6 speed
Brian in Tucson is offline   Reply With Quote
Old 02-21-2018, 04:06 PM   #7
Registered User
 
Join Date: Jul 2017
Location: Tucson AZ
Posts: 523
Quote:
Originally Posted by p3230 View Post
Get a pressure test done on the system to see what is happening.
Best answer of the day.
__________________
2001 Boxster
2007 Toyota Highlander
2003 New Beetle Convertible, Turbo, Tip 6 speed
Brian in Tucson is offline   Reply With Quote
Old 02-21-2018, 04:08 PM   #8
Registered User
 
Join Date: Apr 2013
Posts: 244
Thanks guys....I'll have it pressure tested first. Hopefully it's something simple like a old hose or a old clamp leak.

Thanks
Rob175 is offline   Reply With Quote
Old 02-21-2018, 08:56 PM   #9
Registered User
 
Join Date: Jan 2013
Location: Houston
Posts: 366
I've had a leak for 5 years. Have to add a cup or two annually. New cap and valve didn't fix it. But the car keeps running!
patssle is offline   Reply With Quote
Old 02-23-2018, 03:22 AM   #10
Registered User
 
Join Date: Mar 2016
Location: Youngstown
Posts: 5
Same exact thing happens with my 98. Been occurring for about three years now. I just add the little bit of coolant and everything is fine. My mentality is if it aint broke, don't fix it!
Rjbasile is offline   Reply With Quote
Old 02-23-2018, 05:33 AM   #11
Registered User
 
kk2002s's Avatar
 
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,218
Garage
Quote:
Originally Posted by Rjbasile View Post
Same exact thing happens with my 98. Been occurring for about three years now. I just add the little bit of coolant and everything is fine. My mentality is if it aint broke, don't fix it!
Hate to be the bearer of bad news but if you have to add coolant then something, somewhere is "broke"

But doesn't mean you can't just live with it if your not overheating

I live with a minuscule oil leak (RMS I think). More of a thorn in perfection when I see that drop hanging off the engine after a drive
__________________
2002 S - old school third pedal
Seal Grey
kk2002s is offline   Reply With Quote
Old 02-23-2018, 06:00 AM   #12
Registered User
 
p3230's Avatar
 
Join Date: Oct 2015
Location: Rockland Ontario
Posts: 202
Garage
I have the same mentality as you but when I start adding liquids something is wrong and it's time to fix it.

Quote:
Originally Posted by Rjbasile View Post
Same exact thing happens with my 98. Been occurring for about three years now. I just add the little bit of coolant and everything is fine. My mentality is if it aint broke, don't fix it!
__________________
Frank
p3230 is offline   Reply With Quote
Old 02-23-2018, 06:11 AM   #13
Lew
So Blessed!
 
Lew's Avatar
 
Join Date: Nov 2016
Location: SE Georgia
Posts: 388
Garage
I still have coolant condensation on my deck lid after replacing the old cap with the newer (04 part #) and the two O rings in the relief valve. I plan on rubber banding a zip lock bag over the coolant cap, and on over the relief valve. Maybe that will tell me where the leakage is coming from.....My coolant cap is very tight!
__________________
Artic Silver Boxster S - Black Leather - Black Top - Convience Plus Package
Lew is offline   Reply With Quote
Old 02-23-2018, 07:51 AM   #14
Registered User
 
Join Date: Nov 2006
Location: In the garage...
Posts: 1,584
Quote:
Originally Posted by Lew View Post
I still have coolant condensation on my deck lid after replacing the old cap with the newer (04 part #) and the two O rings in the relief valve. I plan on rubber banding a zip lock bag over the coolant cap, and on over the relief valve. Maybe that will tell me where the leakage is coming from.....My coolant cap is very tight!
A very simple pressure test which pretty much ANY qualified mechanic/repair shop can perform will pinpoint where your problem lies. Cost minimal and time less than 30min.

Good luck
__________________
"Cool Prius!"
- Nobody
Burg Boxster is offline   Reply With Quote
Old 02-24-2018, 07:21 PM   #15
Registered User
 
rp17's Avatar
 
Join Date: Apr 2011
Location: DFW
Posts: 713
You can actually rent a pressure tester from your local auto parts shops.
__________________
What we're dealing with here is a complete lack of respect for the law.
rp17 is offline   Reply With Quote
Old 02-25-2018, 06:47 AM   #16
Registered User
 
Join Date: Jul 2017
Location: Tucson AZ
Posts: 523
Not all coolant tank leaks are huge. Have you felt around underneath yours? A small leak would account for your problem and should show up a moisture in the carpet. I've been chasing down leaks on my 01 since I got it last summer. Everything in front of the firewall is sealed up, but I still have one from the tank ( which I replaced last fall.) If need be, I'll replace it again, if I can't seal it up. But it's gonna require pulling the tank off (again.) These cars are SO fiddly!

If you do have to pull the tank off, plan on replacing the two segments of hose in front of the firewall that connect to the metal tubes. The hose to the oil cooler has quick connects, mine leaked so I replaced it with a permanent junction. Much better!

__________________
2001 Boxster
2007 Toyota Highlander
2003 New Beetle Convertible, Turbo, Tip 6 speed
Brian in Tucson 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 08:37 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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