This week we had a sleek Audi A5 visit our Croydon workshop, booked in for a diagnostic check after the owner noticed a coolant leak and slight oil residue around the top of the engine. These symptoms often point towards a worn crank breather system or a failing water housing unit – both common issues on modern Audi and VW engines once the mileage starts to climb.
After a careful inspection, our technicians confirmed that both components needed replacement. Here’s a quick rundown of the work we carried out and why it’s so important to get it right the first time.
The crank breather system, also known as the PCV (Positive Crankcase Ventilation) valve, regulates internal pressure inside the engine and separates oil vapour from air. When this part fails, you can end up with excess oil consumption, vacuum leaks, and even poor idling. We replaced the entire breather assembly with a high-quality OEM unit, ensuring proper sealing and stable idle performance.
Next up was the water housing, which directs coolant flow between the engine and radiator. The old housing showed clear signs of heat fatigue and cracking – a small leak now, but one that could have led to overheating or head-gasket issues later on. We replaced it with a reinforced component and fresh coolant to guarantee long-term reliability.
Once both systems were fitted, we flushed and bled the cooling system, cleaned the intake area, and carried out a full pressure test to make sure everything was leak-free. A short test drive confirmed smooth running, correct temperature regulation, and no more pressure loss.
Jobs like this highlight why having a local mechanic you can trust makes such a difference. Small leaks and ventilation faults might not seem urgent, but left unchecked they can cause far more costly repairs down the line. That’s exactly why our team at Pit-Air Motors takes the time to investigate, explain, and fix issues thoroughly — never just temporarily patch them.
Whether it’s cooling system maintenance, crankcase repairs, or full engine repair, we handle every vehicle with care and precision. Our workshop is fully equipped for Audi, BMW, VW, Ford, Peugeot, and many more brands, and we always use manufacturer-approved or higher-grade parts.
So, if you’re looking for engine repair Croydon or need a trusted garage to diagnose unusual noises, leaks, or performance loss, visit Pit-Air Motors on Purley Way. We combine technical knowledge with a personal approach — and that’s what sets us apart.
