NM Engineering Catch Tank is machined from billet 6061 aluminum alloy and anodized for stealth and added surface durability. The NM tank catches the oil and moisture in the blow-by gas that can cause carbon and sludge build-up in the turbo, intake system and the engine. Every piece of the kit can be disassembled for thorough cleaning and servicing.
The NM Engineering Catch Tank kit also features the Patent Pending Locking Clip system for securing the billet adapters to the OEM plastic fittings. It allows installer to simply slip the adapter onto the OE fitting and the clip will snap in place keeping the adapter from backing out.
The kit includes block-off plug for the rear PCV port.
MINI dealer service charges 5-6 hours ($600-700) to clean your intake port from carbon build-up caused by the oil/moisture circulating back into the internal. This procedure is 'recommended' around 60-70,000 miles, after your warranty expires.
The N14 Motor has both a low pressure (when the car is not at boost pressure like idle or no load driving) and high pressure (high side means when the car is at full boost pressure) crank case ventilation. On occasion the internal check valve in the valve cover can get blocked and cause pressure to build in the engine. This pressure can prevent the oil that is spinning off the turbine assembly from draining back into the engine oil pan because the pressure will blow the oil out of the turbo into the intake manifold and exhaust.
If there is pressure in the engine it can and does prevent oil from draining out the turbo and the oil may drain into the intake and exhaust. If oil drains into the intake and exhaust it can shorten the life of the engine, catalytic converter, and turbo. So JMTC recommends two catch cans for the N14 motor for two reasons.
1. If the rear crank case is blocked (similar to the valve cover internal check valve failure) it can cause pressure to build in the engine and oil may drain into the intake and exhaust system/s. This will cause premature valve coking due to liquid oil getting into the engine.
2. If the can catch is installed only on the high pressure side it can cause valve coking at idle and when the car is not under load.
JMTC recommends installing a catch can on the low pressure side to prevent oil build up at idle and high side to reduce oil build up (and knock) while under full load or boost pressure.