What happens if the engine exhaust pipe is not connected?

[ManuelMarie]

If the engine exhaust pipe of a car is not connected, it may cause engine noise and abnormal engine operation. The vehicle may fail to meet emission standards, which also has an impact on the environment. Below are the functions of connecting the exhaust pipe in a car: 1. Promotes exhaust combustion: The car exhaust pipe extracts engine exhaust under certain specific conditions and sends part of the exhaust back to the intake manifold, where it mixes with fresh air-fuel mixture and re-enters the cylinder to participate in the combustion process. 2. Improves emissions: Since the exhaust cannot burn, it reduces the combustion speed and temperature inside the cylinder, thereby improving emissions and reducing the content of pollutants.

[Beckett]

Last time I worked on my car myself, I didn't properly connect the engine's ventilation hose before taking it out for a drive. As a result, there were obvious oil stains leaking under the hood, and I could smell a strong odor of engine oil. After checking some materials, I found out that this hose is used to release the pressure from crankcase gases. If it's not connected, the pressure builds up too much, which can damage the oil seals and cause oil to start leaking out. After driving for a few days, I noticed the engine had trouble starting, lacked power during acceleration, and fuel consumption increased noticeably. What's worse, those exhaust gases were directly released into the environment, causing significant air pollution and potentially corroding parts near the engine. My advice is that if you find the hose disconnected, stop using the car immediately and find the tools to reconnect it properly - don't wait until a small issue turns into major repairs. I later bought a new hose to replace it, and only then did the engine return to smooth operation.

[OAubree]

I still remember when I bought my first car, my friend helped change the oil but forgot to reconnect the ventilation hose. After driving for a few days, there was always a strange smell in the cabin, and the engine light suddenly came on. I took it to the repair shop, where the mechanic explained that it was caused by excessive crankcase pressure. An unconnected hose could lead to oil leaks and exhaust gas escaping, resulting in insufficient engine lubrication and accelerated wear. He spent some time reconnecting it, and the problem was gone. The technician said that leaving it disconnected for a long time would shorten the oil's lifespan and could cause more serious issues like oil seal failure. Since then, I've learned to check these small details to prevent problems and save money. Now, during every maintenance session, I personally confirm that the hoses are securely fastened to avoid similar troubles.

[Amir]

Having driven for over a decade, I've dealt with several instances of disconnected ventilation pipes. The most common symptoms are smelling engine oil upon startup and oil leaks from the bottom of the engine. When the pipe isn't connected, pressure can't be released properly, leading to degraded engine performance and increased risk of oil seal damage. If left unrepaired, the oil leak will worsen and cause environmental contamination. I recommend new car owners regularly inspect these pipes to ensure tight connections. Address any issues immediately – don't delay repairs that could compromise safety.

[MackenzieAnn]

As an ordinary person who uses a car daily, I am very concerned about maintenance. If the ventilation pipe is not connected, the crankcase exhaust cannot be discharged, and high pressure can lead to oil leakage risks and may even damage the internal structure of the engine. I neglected it once and noticed increased fuel consumption and engine shaking. During maintenance, I always have professionals check the pipe condition to prevent minor issues from escalating. Keeping the connections stable can extend engine life and reduce unnecessary repair costs.