Q: Puff blue smoke on startup

asked by on

i need help locating the pcv valve on my truck. i think i need to replace it. i get a puff of blue smoke on startup.

My car has 350000 miles.
My car has an automatic transmission.

Your engine does not have a PCV valve. The engine is equipped with crankcase vent tubes that do not need replaced or cleaned unless line is broken. You may have valve seals that are leaking oil into the exhaust valve outlet and when you start the engine it’s sending the oil smoke out of the tail pipe. The valve guides and valve seals need to be checked. Not much to can be done unless cylinder heads are removed. I’d suggest shaving a certified technician, like one from YourMechanic, diagnose the smoke firsthand for an accurate repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Puff blue smoke on startup

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: My actuator works backwards

Hello. We will need to observe several other factors in order to pinpoint what the issue is. When you say you are turning on the vents, what setting are you turning on when this happens? Is it all temperature settings...

Q: First day of ownership car has ticking noise - 2008 BMW 528xi

If the car is a certified pre-owned and is still under warranty when the complaint was logged BMW should still still cover this concern. The 6 cylinder engines have had challenges with the HVA (hydraulic valve actuators or lifters). They...

Q: Truck starts emits a fire compression sound, then revolutions to max with stuttering and turns off. 2004 Chevrolet Silverado 1500

Hi - I suspect the throttle mechanism, specifically the throttle position sensor, has been damaged, or possibly re-installed incorrectly during your other repairs. I would recommend an inspection of the throttle system by a mobile, professional mechanic, such as one...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.