Signs You Have Blown The Head Gasket Of Your Car

It’s bad news when a head gasket blows. terrible news If you believe yours is about to park up, you must give it prompt attention. There are several ways a head gasket might fail, and all of them are hazardous for the engine. You might have a bad head gasket if there is always a sweet-smelling white cloud trailing you.

When the head and the engine expand at different rates, the head gaskets typically fail because they are unable to seal the newly formed gap. This problem is caused in particular on automobiles with an iron cylinder block and an aluminum head.

Signs You Have Blown The Head Gasket Of Your Car

Additionally, some engines simply have heads that are prone to warping or poor clamping force from the head bolts, and they have a bad reputation for failure.

The following are just a few of the issues that can arise when a head gasket fails.

Contamination by oil

The milky sludge on the underside of the oil filler cap or the dipstick is one of the most well-known indications of head gasket failure. This is brought on by coolant and oil mixing together.

This is generally an excellent clue and a sure sign that your engine needs to be taken apart by a professional to locate the source of pollution, even though it is not absolute proof of head gasket rupture.

Any driving will quickly destroy the engine’s bearings if the antifreeze in the oil is contaminated. A minimum engine oil flush and new oil filter are needed for repair, and the bottom end of the engine must frequently be completely disassembled to check the bearings for deterioration and remove any contaminated oil.


The most obvious sign of a damaged head gasket is blowing clouds of fragrant white smoke emerging from the exhaust. Antifreeze that has seeped past the gasket and into the cylinders, where it is converted to steam during the combustion process, is the source of this smoke.

In the event of one of these gasket failures, combustion pressure may also enter the cooling system or the oil breather system. This could be the cause if a radiator hose unexpectedly loses its water outlet or if the dipstick won’t stay in place.


An engine may overheat excessively due to a blocked radiator, a coolant leak, a broken fan, etc., leading to a head gasket failure, but an engine can also overheat due to a blown head gasket.

An overheated engine might result from hot exhaust gases leaking into the cooling system or coolant leaking into the cylinders and burning off as steam.

The alloy cylinder head may distort if the automobile is driven while it is overheating, and steam damage to the catalytic converter can add greatly to the cost of repair.

Lack of Power

The compressed air/fuel can escape from a cylinder if the head gasket fails in a fashion that makes this possible. This decrease of compression causes the engine to function poorly and significantly reduces engine output. Typically, this kind of failure is followed by an exhaust leak-like sound.

Outside leaks

A straightforward coolant or oil leak may occur if the head gasket between the water or oil channel and the engine’s exterior has failed. Even while an external leak might not be immediately apparent, if the coolant level is allowed to fall too low, it can cause major engine problems.

Read Also: What To Do When Your Car Battery Runs Down.


There are a few reasons why head gasket failure is bad in a car. One reason is that the gasket is a seal between the engine and cylinder head. When it fails, oil and coolant can leak into the engine, causing it to overheat and eventually fail. Additionally, the gasket can also cause the engine to vibrate excessively, which can lead to decreased fuel efficiency and even engine damage. In some cases, head gasket failure can even cause a car to catch on fire. Consequently, head gasket failure should be avoided at all costs in a car, and anyone experiencing it should immediately seek out a mechanic to diagnosis and fix the issue.

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