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・Fair and transparent pricing

Get a quote

What others are asking

Q: Ideas of what my problem is?

If you had a scan and it shows a misfire in a cylinder then it can be caused by ignition coils or plug wire boots shorting. Have the cylinder with the code to it checked for a defective coil, wire...

Q: Engine valves have gone out

You more than likely do not have burnt valves unless you have been running the engine real lean for a long time. If you have not run the vehicle lean, then you may have valves that do not seal good...

Q: I am having an oil leak coming from the bottom and the top of my engine, what could cause this?

Hi there. Most of the time these leaks come from the valve cover gaskets or the upper oil pan area. If the leak is really small, it can be caused by a failure in the PVC system. If the leak...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...