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Gelbster · 06-21-2017, 04:32 PM

More on the quick-fix or work-around involving the heater valve.
The heater valve is accessible via the passenger side rear wheel arch (remove wheel).
The Heater valve may also be accessible from above via the engine compartment(remove cover and grope).
Here is a kind guy who posted a video showing replacement of the valve so it gives all the grimy details:
https://www.youtube.com/watch?v=SC198GztmvE
The important part of the video is where he shows how the 2 halves of the plastic valve just fall apart and dump coolant !
Please note the stock plastic heater valve tends to separate where it is glued together, then leaks . That could cause a catastrophic engine failure.
Napa sell a vacuum-operated part that looks similar to the OEM part and is mainly metal with a better crimp:
BK 6601410.
But Four Seasons or Everco sell an all metal vacuum controlled heater control valve that may fit??? It is part # 74671. This valve also fits Audis + some 90's Fords according to Posts in other Forums. The Porsche 944/968 guys use it as an upgrade.
An alternative in all metal intended for 12mm i.d. heater hose is to search "Van Heater Control Valve Kit C3UZ18495A YG133 For FORD E & F SERIES BRONCO DODGE" Just rotate the lever to either block (summer)or allow(winter) coolant to reach the heater core.

To understand why this hack may be a delightfully easy suggestion , read this lengthy, difficult how to:
Interior vent debris
There are some useful links there posted by Mr.Stone.

Another detailed link of the full repair process.
https://www.scribd.com/document/212147792/986-Heater-Flap-Repair-Boxster-foam
Another from Forum Member Meir:
https://www.dropbox.com/s/hx9qr0t3jtkv6th/986%20Heater%20Flap%20Repair.pdf?dl=0

There is a simpler way(78F350 in post 9 below) to access the offending flaps in this link and also in this thread:Interior vent debris
The simpler system link does require cutting and this is clearly shown in the hi res photos.
You need this tape to do the job well: 3M Flue tape
https://www.amazon.com/gp/product/B00004Z4DS

But whatever you do, replace the risky OEM part to avoid the leakage

06-21-2017, 04:32 PM	#21
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,029	More on the quick-fix or work-around involving the heater valve. The heater valve is accessible via the passenger side rear wheel arch (remove wheel). The Heater valve may also be accessible from above via the engine compartment(remove cover and grope). Here is a kind guy who posted a video showing replacement of the valve so it gives all the grimy details: https://www.youtube.com/watch?v=SC198GztmvE The important part of the video is where he shows how the 2 halves of the plastic valve just fall apart and dump coolant ! Please note the stock plastic heater valve tends to separate where it is glued together, then leaks . That could cause a catastrophic engine failure. Napa sell a vacuum-operated part that looks similar to the OEM part and is mainly metal with a better crimp: BK 6601410. But Four Seasons or Everco sell an all metal vacuum controlled heater control valve that may fit??? It is part # 74671. This valve also fits Audis + some 90's Fords according to Posts in other Forums. The Porsche 944/968 guys use it as an upgrade. An alternative in all metal intended for 12mm i.d. heater hose is to search "Van Heater Control Valve Kit C3UZ18495A YG133 For FORD E & F SERIES BRONCO DODGE" Just rotate the lever to either block (summer)or allow(winter) coolant to reach the heater core. To understand why this hack may be a delightfully easy suggestion , read this lengthy, difficult how to: Interior vent debris There are some useful links there posted by Mr.Stone. Another detailed link of the full repair process. https://www.scribd.com/document/212147792/986-Heater-Flap-Repair-Boxster-foam Another from Forum Member Meir: https://www.dropbox.com/s/hx9qr0t3jtkv6th/986%20Heater%20Flap%20Repair.pdf?dl=0 There is a simpler way(78F350 in post 9 below) to access the offending flaps in this link and also in this thread:Interior vent debris The simpler system link does require cutting and this is clearly shown in the hi res photos. You need this tape to do the job well: 3M Flue tape https://www.amazon.com/gp/product/B00004Z4DS But whatever you do, replace the risky OEM part to avoid the leakage Last edited by Gelbster; 06-22-2017 at 08:19 AM.