Skip the auto shop - Our mechanics make house calls

Q: Smoke blows from tail pipe

asked by on

Recently, after my truck gets warmed up it starts smoking from the tail pipe. Also, when the oil cap is taken off it releases a large amount of blowby pressure and the smoke from the tail pipe disappears. What is the problem so I’ll know what to do to fix it. Thanks.

A: If you are getting excessive pressure build...

If you are getting excessive pressure build up in the crankcase, then you may have a clogged crankcase breather system. If the breather system is clean, then you may have a broken piston ring causing the buildup. Have the breather checked first, then a compression test on the engine will show the problem cylinder. I recommend having a certified mechanic inspect the smoke to ensure that the correct repair is being made to resolve this issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Truck sputtering going uphill.

I would only be speculating on this problem since you have altered the fuel tank system on the truck. I suspect that the fuel pump is getting starved of fuel and when you are going up a hill causes the...

Q: Are Harmful Emissions Reduced by a Car's Exhaust System?

The automobile exhaust system has been around as long as the car itself. The purpose of the original exhaust system was to divert gases from the the combustion process away from the engine and operator. The purpose of today's exhaust...

Q: Leaking oil

These engines are known to have oil leaks from multiple gaskets on the engine, power steering leaks, transmission leaks, axle cover leaks, and fill plug leaks. The leaking fluid and location would need to be checked in order to isolate...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.