16 Mar How a Catch Can Can Save Your Aston Martin V8 Engine

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Even low-mileage, high-dollar cars can throw expensive tantrums. This 2020 Aston Martin Vantage V8, powered by the Mercedes M177 engine, arrived at Fluid MotorUnion in Naperville, Illinois, showing misfires, check engine lights, and symptoms no dealer swap could fully solve.

At FMU, we see this often: cars that look flawless on paper can hide mechanical issues waiting to become catastrophic. In this build, one preventative mod—the catch can—proved invaluable, protecting the engine from future damage. Here’s how we approached it.

Understanding the Challenge: Low-Mileage Aston Martin Misfires

Despite these efforts, the misfire persisted. This is where professional auto service in Naperville makes a difference. Rather than continue replacing parts blindly, FMU focused on proper diagnostics: compression and leak-down testing. This revealed intake-side leaks on multiple cylinders—pointing to a mechanical sealing problem, not an electrical or fuel issue.

Our team started fresh. Even with the dealer history, we ran codes, inspected spark plugs, fuel pressure, and intake/exhaust leaks. Some repairs helped, but the misfire returned intermittently.

The key takeaway for high-performance cars like this Aston Martin: chasing symptoms is expensive and ineffective. For owners in Naperville seeking reliable car service, proper diagnostics and understanding the engine’s mechanical fundamentals are essential.

Teardown and Valve Seat Repair

The cylinder head removal revealed the culprit: several intake valves weren’t sealing properly. One cleaned easily, but two required machining at our shop. Valve guides were healthy, the block was solid, but deposits and imperfect seating caused the misfires.

After machining the seats and reassembling the head, the leak-down test confirmed the repair: engine sealing restored, misfires gone, and low-mileage Vantage back on the road safely.

Catch Can 101: Preventing Future Engine Damage

Fixing the immediate problem is only half the battle. Preventative maintenance is where Naperville auto care saves owners thousands of dollars. Modern direct-injection engines, like the M177, don’t spray fuel over the intake valves, so oil blow-by and carbon deposits accumulate over time, causing future misfires or valve sealing issues.

A catch can acts as an oil and vapor separator in the PCV loop, capturing condensate and oil before it reaches the intake valves. Properly installed, it reduces buildup, keeps valves clean, and protects cylinder heads from expensive damage.

Not all catch cans are created equal. The 63 Motorsports M177 kit we installed is designed for this engine family, with aluminum construction, baffles, media mesh, braided fittings, and a convenient drain valve. It’s a preventative measure, not a horsepower booster, but for low-mileage supercars in Naperville, it’s a worthwhile investment.

FMU Catch Can Installation

Installing the catch can isn’t always a straightforward bolt-on. On this Aston, FMU had to fabricate a custom mounting plate to integrate with the factory oil separator system while keeping turbo heat and routing in mind. With careful planning, both catch cans were installed on each cylinder bank, ensuring clean vapor separation and proper drainage.

This preventative modification ensures longer-lasting valves, reduces the risk of misfires, and keeps the engine operating at peak performance without intrusive or destructive repairs.

The Takeaway: Preventative Auto Service in Naperville

Expensive cars like the Aston Martin Vantage don’t always fail predictably. OEMs design engines to balance performance, emissions, and cost, leaving gaps that preventative maintenance must cover. A catch can may seem simple, but in practice, it’s insurance against future misfires, valve damage, and costly cylinder head repairs.

At Fluid MotorUnion in Naperville, we combine expert diagnostics, mechanical repairs, and preventative upgrades to protect high-performance vehicles. This Aston Martin arrived low-mileage but at risk of a major engine failure; it left the shop driving smoothly, protected with the catch can installed, and ready for years of dependable performance.

For Aston Martin maintenance, exotic car care, or precision engine diagnostics in Naperville, FMU delivers results that save owners time, money, and headaches—without cutting corners.

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