Skip the auto shop - Our mechanics make house calls

Q: My car is losing coolant from tailpipe

asked by on

last week my car started smoking from under the radiator reservoir tank and smoke from tailpipe. my mechanic said the head gasket is blown . I put a product called k seal and it worked good for a couple of days now the smoke is coming from under reservoir but less from tailpipe the heat level gauge has been normal the whole time even when there was a lot of smoke from tailpipe the car was shaking a little before mechanic said the head gasket problem affected a piston now not shaking as much check engine light was on now is off I think it might just be a bad thermostat the cars reservoir is now full not losing fluid as fast please respond at your earliest convenience thank you sir

My car has 180000 miles.
My car has an automatic transmission.

A: Hi there. According to what you've desc...

Hi there. According to what you've described, it does sound like your mechanic was correct; a blown head gasket. The radiator reservoir leak may have lead to the blown head gasket by causing a low coolant level, thus resulting in the blown head gasket from a coolant jacket to the combustion chamber. The coolant entering the combustion chamber will cause a misfire and set the Check Engine Light. With enough coolant in the combustion chamber, engine mechanical failure will occur with damaged internal components.

The radiator, head gasket, and thermostat would need to be replaced and a coolant flush service done to remove any of the K-Seal product; these products are only temporary solutions at best. If you'd like a second opinion on this issue, have one of our mobile technicians diagnose the smoke firsthand.

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・Save up to 30%

Get a quote

What others are asking

Q: Code p0037: Bank 1, Sensor 2 H02S Heater Control circuit signal had low voltage for a pre-determined period of time

Hello. If your oxygen sensor is reading low then it may be possible that it needs to be replaced. If there was a blown fuse or disconnected wire then there would be no signal at all. If the oxygen sensor...

Q: Underpowered and shaking under load

Hi there. This may suggest a fuel delivery problem such as bad or dirty fuel injectors or potentially a faulty O2 sensor. As you may know, the oxygen sensors which are part of your emissions system read exhaust gases to...

Q: Is this problem the thermostat or blown head gasket?

Hey there. Test to see if the head gasket is blown the cooling system will need to be pressurized using a cooling system pressure tester to put pressure on the cooling system to see if it holds pressure. If it...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.