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?

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: Car takes 2-3 tries before starting

A few different things can cause the vehicle to have camshaft sensor codes. The most common would be the failure with the camshaft sensor, timing chain damage, improper timing, or a wiring issue. The Check Engine Light should illuminate when...

Q: My truck runs and drives it starts with no problem however it takes off slow has oil in the air filter and won't go over 40 mph

Hello and thank you for contacting YourMechanic. The oil in the air filter is from the positive crank case ventilation valve (PCV)) is not functioning causing the oil to build up and blow out of the valve into the intake....

Q: Oil leak on a '99 Ford F150

You should check out my video Finding And Fixing Car Oil Leaks. You put UV leak dye into the engine and drive it around. Then you get a kit, it costs around $40 if you're lucky to find a discounted...

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 to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...