The oil separator, which is more accurately referred to as an air-oil separater, in a Porsche Boxster sports car is an emissions device that separates fuel vapours from the engine’s crankcase and funnels them back into the intake side of the engine rather than letting them escape to the air. A bad oil separator can cause white smoke to come from the tailpipe and also make the engine run very roughly. Luckily, replacing the oil separator is easy on a Boxster.
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Things you need
- Floor jack
- Jack stands
- Socket set and ratchet
- Quick disconnect fitting pliers
- New oil separator
- New separator to camshaft housing hose
Park the Boxster in a flat, well-lit area. Leave the ignition on and raise the top about 24 inches. Remove the key so the top cannot be activated. Remove the tension lines on either side of the top. Remove them by pulling the socket at the end off of the ball it snaps onto.
Pull the cloth part of the top off of the plastic cover and back off of the top frame. Lay the top out of the way of the engine cover toward the back of the car. Pull the carpet off of the engine cover. Remove the bolts on the engine cover with a socket. Remove the engine cover from the engine bay. The oil separator is located near the intake side of the engine and is a plastic device with hoses coming off of it.
Squeeze the connector on the hose that goes to the intake of the engine and pull the hose off of the oil separator. Raise the rear of the car with a floor jack and lower it onto a pair of jack stands. Ensure that it is supported securely. From below the car, look up at the oil separator. Use special quick-disconnect pliers to remove the clamp that holds the vacuum line to the oil separator that goes to the camshaft housing.
Remove the two bolts that hold the oil separator to the engine with a socket. These will be readily invisible. Bolt the new oil separator in place. Install a new hose that goes from the oil separator to the camshaft housing, using the quick-disconnect pliers. Lower the car off of the jack stands. Install the vacuum line that goes from the intake onto the oil separator. Reinstall the engine cover. Close the engine lid.
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