What is Causing My Car Exhaust to Emit Blue Smoke?
Blue smoke coming from your car exhaust can be alarming. While visually striking, the situation could signal dangerous emissions or mechanical issues. Keep reading to discover what may cause your car's exhaust to emit blue smoke.
Oil Leaks in the Combustion Chamber
As your car's engine ages, vital components begin to wear out. Cracked and brittle valve seals are less efficient when it comes to keeping liquids separate. When this happens, oil may mix with fuel in the combustion chamber, causing blue smoke in the exhaust.
Unburned Fuel in the Exhaust System
If the engine is receiving more fuel than it needs to run efficiently, a fuel-rich mixture occurs. As a result, unburned fuel can exit the exhaust and ignite, producing a blue smoke.
Turbocharger Issues
If exhaust contains blue smoke, there is the possibility that the turbocharger has blown out. A blown turbo may be damaged, or its oil seal could be leaking.
Methanol Injection
Some cars rely on a methanol injection to cool the intake air and increase power. Blue smoke could mean that excess methanol is exiting through the exhaust and burning.
Stuck PCV Valve
A positive crankcase ventilation (PCV) valve releases fuel pressure buildup in the crankcase. When it gets stuck, it forces lubricating oil to mix with pressurized air and other gases. The fume mixture can cause blue smoke when it eventually gets burned.
Exhaust System Modifications
Aftermarket exhaust systems can sometimes cause unburned fuel to exit the exhaust. This may be the problem, particularly if the system is not properly tuned.
Keep Your Exhaust System in Good Repair with Custom Complete Automotive
With a history of quality exhaust system repair in the state of Missouri, Custom Complete Automotive offers unmatched exhaust repairs at unrivaled prices. Our ASE and CCA certified mechanics understand the important role your exhaust system plays in keeping your car and engine running smoothly. To learn more about our exhaust repair services, contact us today!
Find an Auto Repair Shop Near You
We have multiple auto repair shops throughout Missouri located in Columbia, Jefferson City, and St. Louis.
Eric Riddles is an ASE Certified Master Automobile Technician who has been working as an auto mechanic since 1998 and originally joined the team at Custom Complete Automotive in 2005. Eric has numerous certifications in various aspects of car repair and spent 10 years training the next generation of auto technicians at a local high school Auto Shop classroom.
