60 Second Problem Solver

Got a leak, but not sure how to fix it? Use our handy guide to identify what type of car leak you have and find out how to repair it with K-Seal.

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There’s more than one way to identify a car leak. From head gasket failure to problems with your water pump, diagnose your car leaks in 60 seconds with this handy list of symptoms and solutions.

White ‘smoke’ from the exhaust

White smoke coming out of a car exhaust.
White smoke pours out of a car exhaust.
(Image credit: Ruben de Rijcke, Wikimedia Commons)

This is actually steam condensing as it gets burned off by the engine. You may also see blue smoke, for a different reason. Either way, it’s likely your car is suffering from head gasket failure, and you need to fix the problem, fast.

Solution: Add K-Seal ULTIMATE to the cooling system. For more information on why this might be happening, check out our in-depth articles:

Bubbles in the header tank

Bubbles froth out of a header tank.
Bubbles forming in the header tank could be a sign of head gasket failure.

This suggests that combustion or exhaust gases are leaking across the head into the coolant due to a head gasket failure. In extreme cases this may even cause the coolant to overflow.

Solution: Add K-Seal ULTIMATE to resolve this issue but be sure to read the full instructions.

Engine overheating

A warning light on a car dashboard shows the engine is overheating.
Keep an eye on your dashboard for this warning light – a sure sign your engine is overheating.

A coolant leak will lead to the engine overheating because there isn’t anything to cool it down.

Solution: Add K-Seal so it can find the leak and plug it.

Cracked engine block

An engine block with a crack in it
A cracked engine block.

A cracked engine block is the result of constant overheating due to a lack of coolant. If the damage can be repaired, do so and then use K-Seal to plug the leak to prevent it reoccurring.

Solution: See our full instructions on how to use K-Seal with its unique ‘Shake, Pour and Go’ application to help stop a car leaking.

Puddle under the car

Underside of a car shows liquid dripping to the ground, forming a puddle.
Got a puddle under your car? You may well have a coolant leak.

This could be a radiator leak or a split hose causing coolant to leak out of the engine onto the ground underneath.

Solution: If it’s a radiator leak then add K-Seal. If it’s a split hose then you’ll need to get the hose replaced or try an emergency repair tape.

Excessive moisture inside the windscreen or wet mats in the footwells

A car sunroof with excessive moisture on it
Excessive moisture on the inside of a car sunroof.

This is almost certainly a leaking heater core.

Solution: Add K-Seal to the cooling system and turn the heat up.

Fruity smell inside and outside the car

This could indicate that the heater core is leaking into the cabin.

Solution: Add K-Seal and see if the smell disappears. If not, seek mechanical help.

Noisy water pump

If the water pump is making more noise than usual, this could be a damaged impeller.

Solution: The impeller seal can be repaired by K-Seal if it isn’t too big – otherwise it might have to be replaced.

Stop your car leaking

Want to get hold of a bottle to fix your car leak? Use our simple ‘where to buy’ service to find your nearest store and get back on the road. Don’t wait until you have expensive repairs to pay for – stop your car leaks, fast.

Expert Advice

Head Gasket Failure? Cracked Head or Block?
Leaking Radiator?

Expert Advice

Where to buy K-Seal

Have any of these symptoms? K-Seal could save you thousands on a workshop repair. Search for a stockist today!

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