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

LinkBack Thread Tools Display Modes
Old 03-18-2019, 06:54 AM   #1
Registered User
Join Date: Mar 2019
Location: long island
Posts: 3
Smoke coming from coolant/oil area in trunk


I have a 2000 Porsche Boxster an noticed some condensation as well as smoke coming from the dipstick/coolant tank and oil refill in the trunk of my car. if anyone has any suggestions/comments/thoughts let me know.


emh117 is offline   Reply With Quote
Old 03-18-2019, 10:38 AM   #2
1997, PCA Riverside
rexcramer's Avatar
Join Date: Aug 2015
Location: Upland, CA
Posts: 1,245
My guess is your car is running a bit hot and blowing off some pressure. If you take both caps off and remove the plastic cover, you will find the pressure relief valve underneath. It has two o-rings that can go bad, the relief valve can go bad and you might need the updated coolant cap. The latest part number rev ends in -04. When your system purges, it dumps coolant under the cover that drains out through a hole in that dished area.

While you are in the trunk, try pulling up the carpet and check to see if you have any coolant underneath. Your coolant tank may have developed a leak.

Make sure you let the system cool down before trying to take the coolant cap off.
rexcramer is online now   Reply With Quote
Old 03-19-2019, 04:06 AM   #3
Registered User
kk2002s's Avatar
Join Date: Sep 2012
Location: S. New Jersey
Posts: 1,239
Is there condensation on the truck lid above that area? (Looks like it from the pictures with moisture on the rubber seal)
That will also indicate issues with Cap/Purge valve/Tank.
Once you take off the plastic cover is there a white residue around your Purge valve? (This indicates it's leaking)
How is your coolant level?

Smoke from oil fill and dip stick, I don't know about that. Maybe after a longer drive, removing the cap maybe one might expect to see some vapor escaping.
2002 S - old school third pedal
Seal Grey

Last edited by kk2002s; 03-19-2019 at 04:09 AM.
kk2002s is offline   Reply With Quote
Old 03-20-2019, 08:44 AM   #4
2003 S, Arctic Silver, M6
paulofto's Avatar
Join Date: Oct 2014
Location: Winnipeg, MB, Canada
Posts: 1,154
Check your coolant cap. The latest one ends in 04 and yours doesn't look like it does. Older caps may have a weak release spring and allow pressurized coolant vapour to escape. Get new one regardless P/N 99610644704.

paulofto is offline   Reply With Quote

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 05:43 PM.

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