Where is the exhaust gas valve on the Passat B5?

[MacBella]

The exhaust gas valve on the Passat B5 is located near the engine intake pipe, installed between the compressor outlet and the condenser inlet. You can find it by opening the engine hood. All car engines are equipped with an exhaust gas valve, which is a component of the crankcase ventilation system. Below are relevant details about the exhaust gas valve: The exhaust gas valve, also known as the oil separator or pressure control valve, is installed between the compressor outlet and the condenser inlet. It improves heat transfer efficiency in the condenser and evaporator through separation. Working principle of the exhaust gas valve: High-pressure gas (gaseous working medium and lubricating oil) discharged from the compressor enters the exhaust gas valve and flows through the guide vanes in a spiral pattern. The lubricating oil is separated from the working medium gas by centrifugal force and gravity, flowing down along the inner wall of the cylinder. The working medium gas is discharged from the center pipe of the exhaust gas valve through multiple baffles. The separated lubricating oil accumulates at the bottom of the oil separator and can be periodically drained or automatically returned to the compressor's crankcase via a float valve.

[RowanFitz]

I've repaired many Passat B5 models, and the PCV valve is located in the upper area of the engine bay, near the intake manifold side. It's usually hidden around the junction of the intake pipe and exhaust manifold. If you open the hood and look from the driver's side, it's positioned slightly towards the middle-rear. Its function is to recirculate some exhaust gases back into the engine for combustion, reducing emissions. Common issues include carbon buildup causing unstable idling or poor acceleration. For inspection, it's best to wait until the engine cools down, then gently disassemble the piping with a wrench for cleaning. I recommend regular cleaning to prevent major problems. The valve location isn't obvious on these older Passats, so unless you're experienced, don't tamper with it blindly - better to visit a professional shop for peace of mind.

[AaronAnn]

My Passat B5 had issues with the exhaust gas recirculation valve before. It's located under the hood, slightly left of center near the engine, close to the firewall side. The car would always shake violently when idling, and the mechanic said the valve was dirty and needed cleaning. The position is quite hidden - you have to remove the heat insulation blanket or covers to see it clearly. For regular maintenance, be aware that high engine temperatures can easily cause carbon buildup, which affects exhaust quality and may increase fuel consumption. I always remind myself to work on it only after the engine cools down. Beginners should preferably get help from someone experienced to avoid damaging the pipes during disassembly.

[StBrooke]

The Passat B5 PCV valve is typically located in the front half of the engine compartment, near the intake system pipe connection. Based on my image research, it connects the exhaust pipe to the intake for exhaust gas recirculation to reduce emissions. The exact position may vary between 1.8T and V6 engines, often situated under the middle section of the top cover. Fault symptoms include illuminated engine warning lights or jerky acceleration. Always let the engine cool for one hour before DIY inspection to prevent burns. Online forum tutorials can help locate the specific position, but inexperienced users should avoid forcing components to prevent oil leaks.