Q: I've changed valve seals and all gaskets I'm getting gray smoke from tailpipe in 2000 Silverado

asked by on

I'm getting gray smoke from tail pipe I've changed all gaskets and valve seals I also replaced injectors seals what am I missing ?

My car has 19800 miles.
My car has an automatic transmission.

Gray smoke suggests burning oil but you can use a scan tool to look at fuel trims and see if perhaps rich operation is contributing to the problem as well. With regard to replacing the seals, if the valve guides are worn, that wear can overcome the seals and you will still get oil down the guide. Of course, oil can get past the rings too. To see if you ring wear, you can test each cylinder for compression, adding oil to any cylinders with low compression. If adding oil raises compression appreciably, you have worn rings. Another test is look for smoke under heavy acceleration; if it occurs that is indicative of a piston or piston ring problem. If you request an engine smoking diagnostic, the responding certified mechanic can determine what repairs will be required. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I've changed valve seals and all gaskets I'm getting gray smoke from tailpipe in 2000 Silverado

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: Horn repair cost.

The horn is a pretty basic circuit on your truck. The most common causes of a horn failure on your truck are the horn itself, the horn button, or the body control module. If the horn does not work at...

Q: Random misfire on cylinder one - 2000 Chevrolet Corvette

Hello. Random misfires can be caused by a few different things. If the coil packs are all good then it may be possible that the issue is not related to the ignition system. A few other things that can cause...

Q: will only start full throttle and will only stay running if it's full throttle rpms don't go passed 1500 and keeps fouling plugs

If the engine is equipped with a throttle body injection system, then you should disconnect both injector harnesses and then turn the engine on to see if it looks like the injectors are putting fuel into the engine or the...

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...
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...