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Old 08-05-2016, 07:21 AM   #1
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Question Change-Over Valve on 1999 Boxster 2.5?

Does anyone know how many change-over valve used on 1999 2.5 Boxster?

According to Porsche Boxster Air Injection System diagram, it shows 1 change-over valve under the intake plenum.

When I removed the intermediate air intake and the cable throttle for a complete cleaning, I found a valve mounted next to the Starter. It looks like the change-over valve. I am not sure what it is. It has two(2) nipples. One straight nipple has a tube connected a junction that connects to the Vacuum tank, intake black rubber sleeve (passenger side), etc. The other 90 degree nipple has a tube with white protective sleeve. The other end of this long (> 2ft ) tube does not connect to anything.

See picture of the valve.

Any comments or advise to what this valve is and where the 90 degree tube w/ white sleeve should be connected to?

Thanks for your help!
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Old 08-05-2016, 07:34 AM   #2
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Quote:
Originally Posted by N99Boxster View Post
Does anyone know how many change-over valve used on 1999 2.5 Boxster?

According to Porsche Boxster Air Injection System diagram, it shows 1 change-over valve under the intake plenum.

When I removed the intermediate air intake and the cable throttle for a complete cleaning, I found a valve mounted next to the Starter. It looks like the change-over valve. I am not sure what it is. It has two(2) nipples. One straight nipple has a tube connected a junction that connects to the Vacuum tank, intake black rubber sleeve (passenger side), etc. The other 90 degree nipple has a tube with white protective sleeve. The other end of this long (> 2ft ) tube does not connect to anything.

See picture of the valve.

Any comments or advise to what this valve is and where the 90 degree tube w/ white sleeve should be connected to?

Thanks for your help!
One, part number 7PP-906-270.
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Old 08-05-2016, 07:56 AM   #3
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Thanks for the P/N.
I found out from previous threads that it is the resonance flapper control valve the 90 degree tube is for the flapper which my 1999 Boxster does not have. This is why the tube does not connect to anything.
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