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 describe...

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

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: How often to change the transmission oil on Toyota? Recommendation about LDD headlights

First of all--leave the headlights alone. They work perfectly fine where they are. When you start buying those replacements kits, a lot of times they are made in China or cheaply made. They end up blowing fuses that don't work...

Q: Fuel leak

A fuel leak in the engine compartment is likely caused by the flexible fuel line coming off the fuel filter that is going to the fuel rail. A fuel leak is a large safety concern. While this repair may seem...

Q: I put coolant in my reservoir bottle it never filled up

Hi, thanks for writing in. The reservoir coolant goes directly into the engine and radiator. The fact that you added a gallon means the system is leaking somewhere. The coolant does not get this low without leaking out, usually through...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...