Q: Excessive blue smoke
Car failed test on emissions last week. Was told the cat is gone for a new 1 fitted today and about an hour later car started smoking thigh blue smoke.. car is well serviced and maintained.. never blew smoke before.. I put in an oil additive and ran it for 2 hours with no change.. any suggestions
My car has 99500 miles.
My car has a manual transmission.
Recommended Services
| Smoke from engine or exhaust Inspection | $94.99 - $114.99 | Get a Quote |
Blue smoke coming from the exhaust generally means that the motor is burning the engine oil. This can happen for a couple of different reasons such as worn piston rings or leaking valve guide seals. When this happens, the engine oil is burned in the combustion chamber along with the fuel which is what generates the blue smoke coming from the exhaust. I would recommend having an expert from YourMechanic come to your location to inspect your car’s running condition to determine what may be causing the blue smoke coming from your exhaust.
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
What others are asking
Reverse lights not coming on.
The reverse light switch is powered by the meter fuse and when you put it in reverse the power is sent to the rear reverse lights. The rear light socket would have to be tested (https://www.yourmechanic.com/services/reverse-light-bulb-replacement) to see if power...
The car cut off
Hello. The car model will help us narrow down what to look for. Are there any lights that turn on on the dash when starting the car? Do any interior lights turn on? If nothing turns on, there is an...
What is the torque setting on my tire nuts? - 2017 Subaru Legacy
Your lug nuts should be torqued to 80-90 foot pounds. This is fairly standard on most cars. You may want to check the torque after the first few hundred miles as well since lug nuts sometimes back off a bit...
Misfire on my engine and I am getting an injector code 27. (OBD1)
Hi there. The injector output driver is not responding properly to the control signal. Check the wiring from the computer to the injector driver. If the noid light is flashing erratically, then the controller (computer) is not functioning correctly. You...
Alternator not charging battery a600
Hello, It sounds like you may have a voltage regulation problem which may be preventing the alternator from doing it's job properly. The voltage regulator is a unit that regulates the charging of the battery by the alternator (https://www.yourmechanic.com/services/alternator-replacement) and...
Heater not working properly
Common causes of no or inadequate cabin heat include malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve (https://www.yourmechanic.com/services/heater-control-valve-replacement), a plugged heater core, stuck open engine cooling thermostat, collapsed hoses, and low coolant...
CAR completely dead, lights on but are dim, lost power steering, and power windows, ABS LIGHT AND BATTERY LIGHT ARE ON,
There are several possibilities, all involving the vehicle electrical system. I would suggest first measuring charging system output. If charging system output is normal, and the battery is new and fully charged, and yet the lights are dim and the...
Car wont start away I’ve replace starter battery and alternator what else could cause this problem
You will need to be a little more specific on what the problem is you are having? Is the engine turning over at normal speed when turning to start but engine just takes too long before it will start? This...
the sliding door lock in frozen in the locked position is this an indicator that the actuator needs replaced?
There is a motor in the lock actuator. Premature wearout of the motor is a known reported issue. The testing consists of ensuring that power is being delivered to the actuator, that is ensuring that the electrical connections to the...
Related articles
A Buyer’s Guide to the 2012 Toyota Prius Plug-In
Toyota Toyota definitely isn’t sitting on its laurels where hybrid cars are concerned. To compete with other electric cars like the Chevrolet Volt and the Ford Focus Electric, the 2012 Toyota Prius Plug-In gives car buyers a higher-mileage vehicle with...
The Best Used Cars to Buy If You're a Doctor Who Makes House Calls
If If you are a doctor who makes house calls, reliability is likely to be at the forefront of your mind when it comes to choosing a used car. You also expect a certain level of comfort. We have evaluated...
The Best Used Cars to Buy If You're a Construction Worker
If If you're a construction worker, you don’t have to worry about hauling a whole lot of supplies and materials to the site – that’s the boss’s problem. As long as it’s big enough to hold your tools (and most...
Browse other content
Maintenance
Services