Skip the auto shop - Our mechanics make house calls

Q: Huracan 5.0. creates white smoke on colder days

asked by on

2006 Huracan 5.0. Sometimes when it turns around it creates white smoke for about 30 seconds, mostly on cooler days. Mechanic where the car was taken to says it's the valve seals. Is that right? What's your opinion?

A: It probably is the valve seals. You want to...

It probably is the valve seals. You want to hope it's not the head gasket blown. To check the head gasket is simple. I've got a video that tells you if your head gasket is blown. It's a simple test--the blue liquid is put into a test tube and stuck on the radiator and if turns from blue to yellow, there's carbon dioxide in the system and you have a blown head gasket. It's only a head check of course. If it is the valve seals, you live with that.

Just change the spark plugs a little more often. If you really want to test to see if it's the valve seals, what you can do is do a wet and dry compression test. If you do a wet and dry compression test and they are about the same, then the valve seals are worn. But, if it makes a difference, then it's the piston rings that are worn and are making the smoke. You'll want to hope that it's the valve seals and not the piston rings, because with piston rings, you are going to have them eventually replaced. As for the valve seals, you can leave them for quite some time, which will burn a little bit of oil.

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: Ignition coil pack is not firing (1 out of 3)

It is not uncommon for an ignition coil to fail. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeated as the copper beneath them expands and contracts much quicker than...

Q: Car stalls at traffic lights

If this is happening primarily at stop lights, it may be related to a dirty or faulty idle air control valve. This is a unit in your car's intake system that monitors the flow of air into the engine and...

Q: Oil burning off 1 1/2 quarts every 200 miles

Hello there, thank you for asking about your 1994 Isuzu Pickup. For your vehicle, minimum compression is 114 PSI and all cylinders should read within 70% of each other. So, according to your results, compression is good. My guess is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.