Water in Secondary Air Pump

[gsborden]

Hello,

I am having a problem with water getting into the secondary air
pump. I am not sure if it is getting through the air filter
somehow, or coming in through the exhaust. Either way, the water
rusts the motor in the air pump and eventually it stops working.

Has anybody else had this problem and determined the cause?

Thanks

[motorsport]

never had a problem with it but it sounds like a seal somewhere

[BMWDRIFTER]

the valve that lets the air from the pump into the exhaust has stuck open. Which allowes hot exhaust into the pump. when the car is shut off the pump cools and forms condensation inside the pump. Same as it does inside the exhaust. this leads to the air pump rusting inside and eventually locking up. We always replace the pump, valve and relay together. A fried pump will damage the relay, if not replaced it normally fails several months later. The valve is normally the cause of air pump failure.

[gsborden]

BMWDrifter,

Thanks, for the advice. I'll replace that valve and hopefully its not too late for the air pump. It still works, but is noisy.