Porsche 924S/944 air-oil separator: what it does and how to reseal it
The 924S/944 air-oil separator is just a swirl tube with four seals. Here's what it does, why old seals cause vacuum leaks, and how to rebuild it.
A small workshop designing engine, suspension and interior parts for the 924S and 944.
Made by enthusiasts, for enthusiasts
What we make
Paddock Service isn't a catalogue. We pick one weak point at a time (a plastic water pipe that cracks, an alternator pulley heavier than it needs to be, a throttle cam with lazy first travel) and design the part we'd want to fit on our own car. Drawn in CAD, prototyped, tested on a 924S, then produced in small runs.
Some parts replace OEM items gone NLA. Others are upgrades where the factory left performance on the table. Everything is made in Europe.
How it started
Paddock Service began as a restoration project.
When the right parts turned out to be either NLA or a transatlantic order away, I started designing them, first for my car, then in small runs for yours.
Guides
Maintenance, upgrades and buying advice from the workbench. Read before you order.
The 924S/944 air-oil separator is just a swirl tube with four seals. Here's what it does, why old seals cause vacuum leaks, and how to rebuild it.
What vapor blasting is, how it cleans aluminium and magnesium parts without removing metal, how it compares to sandblasting and other methods, and how to get your 924S/944 parts done.
With a cold engine the circuit splits in two at the thermostat. Fill block and head, open the 12 mm bleed screw, and skip unnecessary procedures.
Shipping & returns
Dispatched from France to your garage, wherever that is.
La Poste Colissimo
Tracked and signed-for, worldwide.
Dispatched within 48 hours
Shipped Monday to Friday from our workshop.
14-day returns
Change your mind, return it. We'll refund the part.
Secure payment
Stripe checkout. EU VAT included where applicable.
Shipping is calculated at checkout from your address and the parcel weight. Most orders leave within 48 hours, Monday to Friday.
Can't find it?
If the part you need isn't in the shop yet, send us the part number or a photo of the old one. We'll tell you whether it's already on our list, in testing, or worth a small production run.