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YOUR RESEARCHCoolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Install by an incompetent shop i finally emailed porsche_joe over
Performed · outcome unconfirmed
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Performed · outcome unconfirmed · Original poster
After have 2 new coolant tanks installed by an incompetent shop I finally emailed Porsche_Joe over on PPBB about the write up he did a while back since I was confused.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Install by an incompetent shop i finally emailed porsche_joe over' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install by an incompetent shop i finally emailed porsche_joe over' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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Suggestion
I will be replacing the Coolant bleeder valve and o-rings 2004 S when the parts come in.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace coolant cap i keep thinking maybe its
Suggestion or failed attempt
No successful repair reported for this finding.
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Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
i have some condensation as well on my trunk lid, and since i replaced the coolant cap i keep thinking maybe its that, but ill change these out as well.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace these out as well
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
i have some condensation as well on my trunk lid, and since i replaced the coolant cap i keep thinking maybe its that, but ill change these out as well.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace those o-rings
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I'll rest easier knowing that I can alway do a search for this "if" I ever need to replace those o-rings...
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (9)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Install by an incompetent shop i finally emailed porsche_joe over
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed · Original poster
After have 2 new coolant tanks installed by an incompetent shop I finally emailed Porsche_Joe over on PPBB about the write up he did a while back since I was confused.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace coolant cap i keep thinking maybe its
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
i have some condensation as well on my trunk lid, and since i replaced the coolant cap i keep thinking maybe its that, but ill change these out as well.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace these out as well
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
i have some condensation as well on my trunk lid, and since i replaced the coolant cap i keep thinking maybe its that, but ill change these out as well.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use fingers
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Install the eight bolts (Hint: when starting a screw or bolt, use your fingers to turn it counterclockwise while gently pressing on it until you feel it “pop” into place then turn it clockwise to tighten it.
Coolant Condensation on Trunk Lid - Bleeder Valve O-Ring Replacement Guide - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
9 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
After have 2 new coolant tanks installed by an incompetent shop I finally emailed Porsche_Joe over on PPBB about the write up he did a while back since I was confused. He was super nice and gave me some useful tips. So I did the procedure with his new information and took some pictures so everyone can share in how to solve the quite common coolant condensation on the inside of the trunk lid problem. ENJOY!
COOLANT BLEEDER VALVE O-RING REPLACEMENT PROCEDURE
Parts:
1 999-707-370-40 Rubber o-ring
1 999-707-371-40 Rubber o-ring
Tools:
Ratchet 1/4" Sears No. 43187
7mm socket 1/4" Sears No. 43503
3" extension 1/4" Sears No. 43539
Regular blade screwdriver
1. With the engine cold, remove the oil and coolant caps. IMPORTANT: The engine MUST BE COLD to prevent the possibility of scalding when removing the coolant cap.
2. Remove the plastic cover to access the bleeder valve. You can carefully pry up the cover using a regular screwdriver. You should see condensation on the underside of the cover and/or dried coolant around the bleeder valve. The bleeder valve is not the problem unless you have one or both of these symptoms.
3. Put the oil and coolant caps back in place. This is IMPORTANT because it prevents you from dropping a bolt or o-ring into one of the openings. That would be a bad thing!
4. Lift the metal ring of the bleeder valve from the horizontal position (closed) to the vertical position (opened).
5. Remove the 8 bolts that secure the bleeder valve to the bleeder valve housing and coolant tank. Lift the bleeder valve from the housing.
6. Remove the bleeder valve housing by pulling straight up. This is a very tight fit. I had to use a regular screwdriver to carefully pry up the housing before I could remove it. Once you “break it loose” it lifts out easily.
7. With the housing removed you will see the two o-rings on the top of the coolant tank. I sprayed some silicone lubricant on the new rings before installing them (yea, yea, yea, I know, silicone lubricant accelerates the deterioration of rubber but that’s what I had available at the time). The lubricant will help keep the rubber o-rings from sticking during assembly. Instead of silicone lubricant you could coat the new o-rings with a thin coat of liquid soap or even use something like Vinlyex. Remove the old o-rings and install the new ones.
Small O-Ring:
Large O-Ring (old one from “brand new tank” on left, real new OEM Porsche right)
Both O-rings on the bleeder valve top
8. Install the housing making sure the bolt holes line up properly.
9. With the bleeder valve still in the open position, install it on the housing.
10. Install the eight bolts (Hint: when starting a screw or bolt, use your fingers to turn it counterclockwise while gently pressing on it until you feel it “pop” into place then turn it clockwise to tighten it. If you do this each time you will never miss thread a screw or bolt again.) Be careful not to over tighten the bolts. I could not find torque specifications in the shop manual. If your problem continues then you may have to come back later and apply a little more torque.
Be very careful here or this could happen to you and you will need a whole new tank if you break the bolts.
11. Close the bleeder valve (move the ring from the vertical position to the horizontal position.)
12. Remove the oil and coolant caps.
13. Install the plastic cover.
14. Install the oil and coolant caps being careful not to miss thread the coolant cap.
15. Go for a nice long test drive.
thx man.
i have some condensation as well on my trunk lid, and since i replaced the coolant cap i keep thinking maybe its that, but ill change these out as well.
It might take a few days to clear up after you change them. Took about 3 drives and 200 miles for mine to clear up completely. Now I just gotta figure out if the bleeder valve is suppose to be up all the time since that is what happening now. Nothing is leaking and temp holding so I assume its right, but who knows haha.
Let me know if you have any questions or need help.
I will be replacing the Coolant bleeder valve and o-rings 2004 S when the parts come in.
I have no problem removing the bleedervalve cap (removing all the bolts)
I'm not clear on removing the housing to get at the o-rings...the post has some great pictures but the one removing the housing did not come out in the post.
does anyone have a picture of the bleedervalve housing
and the easiest wasy to pry it loose.
