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Today, we'll be getting into replacing a PCV valve on this 2018 Audi S5! This removal/install guide is specifically for the 2018-2023 B9 S4/S5/SQ5.
(There will be multiple catch can options on the market quite soon specifically for these engines)
PARTS NEEDED:
Oil Separator: 06M-103-515-H
Separator Gasket: 06M-103-517-B
Oil filter Gasket: 06M-103-727-A
Intake Manifold Hose: 06M-129-041-H
Positive Crankcase Hose: 06M-103-217-DD (optional, under the turbo)
Almost ALL Audi engines are plagued with all sorts of mechanical failures from different system that fail over time including: waterpumps , thermostats, and the infamous PCV VALVE.
The PCV or as otherwise known, the Oil Separator, has been a wide spread regular failing part on the 2.0T, 3.0T, and even the 4.0T Audi engines.
OIL SEPARATOR
The system consists of a housing with a mounting for the oil filter, the fine oil separator, a pressure control valve, as well as a connection for a downstream valve unit to distribute the treated blow-by gases.
FUNCTION
In the breather module the blow by gas is finely separated by channeling it through a chamber containing baffles. The middle chamber houses two impactors which the gases flow through the nonwoven material. The task of this material is to breakdown the oil spray. Oil droplets form. By reversing the flow direction, the oil droplets are trapped by the downstream baffles due to the force of gravity. The oil droplets collect in the oil collecting chamber.
FAILURE SIGNS COULD BE:
Oil around oil cap/pcv system
Vacuum Leak
Check Engine Light
Rough Idle
Whistling Noise from Engine Cover
Oil Consumption
Dyno Day - Audi B9 S4 PCV Failure:
• HYBRID TURBO SUV SHOWS...
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