Q: Smoking comes from exhaust under hood.

asked by on March 08, 2017

I have a sbc and just changed the spark plugs and wires now she's smoking from the exhaust. She wasn't doing that at first and plus I redid the whole motor
My car has an automatic transmission.

Smoke from engine or exhaust Inspection $94.99 - $114.99 Get a Quote

If you used any sprays while working on the spark plugs the smoke may be from the product heating up and burning off of the exhaust manifolds. Exhaust manifold gaskets will also smoke for some time when newly installed on an engine. You should also check to too if you have any oil leaking from your valve cover gaskets. Consider hiring an experienced technician like one from YourMechanic who can come out for a closer look at the vehicle to offer a more personal diagnosis of your smoking exhaust components.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Possible problem with my fuel pump or fuel filter.
What makes you think it is a fuel problem. I would need more information before I can help you diagnose the problem. The proper way to check for fuel issues is to put a fuel pressure gauge on the fuel...
Looking to upgrade header.
Hello. Typically having water in the headers is not a good sign. If the vehicle is not driven much then condensation can build up in them from short periods of running the engine. If the vehicle is driven often and...
How do I use the Aux port?
You can use the Aux port to play music from an external device through your sound system. When you use the Aux port, the sound system volume control will still work, but all other features must be controlled on the...
Check Engine light coming on after timing belt replacement.
Hi there. Fault P0018 after a timing belt replacement generally indicates that at least 1 cam is off timing, usually by one one tooth if the engine still runs well. The correlation fault is saying that the crankshaft position in...
Luke warm heat from heater
This may be a thermostat issue where the thermostat is not closing at the right temperatures resulting in the coolant running continuously throughout the motor which does not allow the engine to reach normal operating temperature. As you may know,...
Squealing noise at front wheels when slowly accelerating or coasting?
Hello. The sounds you are hearing are likely related to the brakes. There are tabs that are manufactured onto brake pads. These are called wear indicators and they are doing exactly what they are designed to do. When the brake...
Bad starter or bad battery?
Be sure any engine immobilizer system (security system) is not activated, thus preventing the car from starting. The battery should be load tested by a professional. Load testing can only be reliably performed on a fully charged battery. If the...
Can brake problem cause engine problem? 2006 VW Jetta
Hi there - the brake booster on your Jetta uses an engine-driven vacuum pump (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-brake-booster-vacuum-pump) - rather than vacuum from the engine intake system and a vacuum booster cylinder as many cars have historically used. It sounds like your mechanic...
Vibrating or shaking
Hi There, It sounds like you may be having a problem with the vehicle vibrating or shaking. Shaking or vibration (https://www.yourmechanic.com/services/engine-is-shaking-pulsating-or-vibrating-inspection) may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things...

Related articles

The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have evaluated...
Symptoms of a Bad or Failing Fuel Hose
Signs of a bad car fuel hose are visible cracks along the fuel hose exterior, the smell of gas in the car, and visible fuel leaks under the car.
How to Get Chevrolet Dealership Certified
Chevrolet car dealerships offer automotive technician jobs to mechanics who are certified through the many training programs available.