Head gaskets are a critical component of any internal combustion engine, and when they go wrong, they can cause major issues, with four or even five-figure repair bills as the end result. You don't want that, especially if you're out on the trails and away from civilization. There are two major ways in which a head gasket can go wrong. It can leak, or it can outright blow.

If a head gasket blows, there's really no other option than to replace it and stomach the costs. However, head gaskets are very well engineered, and don't usually blow unless you've really been cruel to your engine. If you've been skipping out on regular maintenance, allowing your engine to regularly overheat, or turbocharged the life out of it in the pursuit of power, a blown head gasket is very likely at some point.

You can't drive on a blown head gasket. However, you can drive around a bit on a leaky gasket, at least until you reach home or a workshop. In some cases, you may not even know if your head gasket is leaking, until things get worse.

That's why it's recommended that you should periodically check your vehicle's engine for the signs of head gasket leaks that we've provided further down in this article. It's very important to do so, especially if your engine has passed the 100,000-mile mark without a head gasket replacement.

Looking for head gasket or related products? We've got it all in our dedicated head gaskets section at 4 Wheel Parts. Simply browse away and ask if you have any questions. Now, let's get into the meat of the topic.

What is a Head Gasket Leak?

Internal combustion engines have a myriad of channels. The major channel of sorts is what the pistons travel in. The pistons are lubricated by a thin film of oil to ease their passage up and down, which can happen a thousand times a minute or more. There are channels to carry lubricating oil around. There are also coolant channels that carry hot coolant away from the engine and into the radiator.

Where your engine's cylinder head meets the cylinder block represents a spot where these different fluids, plus gases from combustion could possibly meet and contaminate each other. You don't want oil or coolant to enter your cylinders, for example. Thankfully, the head gasket keeps all fluids separated at this critical point.

A head gasket leak is where a crack or minor break in the head gasket causes some mixing of these fluids and gases. Head gaskets operate in a severely extreme environment. They face a variety of temperatures as your car runs and rests, plus varying pressures as the cylinders are fired and the fluids travel around. Under normal conditions, you might never need the head gasket changed. But if you're an off-roader, ‘normal operating conditions' isn't in your vocabulary.

How to Tell if You Have a Gasket Leak

There are a few ways to tell if you have a head gasket leak. These include:

• Engine oil consumption. Typically, engines do not consume oil much between oil changes, or consume a quart at most, when older. Significant oil consumption needs to be investigated.
• Ask someone to rev your engine and observe the color of exhaust emissions. Typically, exhaust emissions should be colorless. If the exhaust emits white smoke, that means coolant is leaking into the cylinders. If the smoke has a blueish tinge, it's oil that's being burned. Either way, a leaky head gasket is the most probable suspect.
• Does your engine overheat under regular driving? This could be one indicator of a head gasket leak, although it could also be a cooling system issue.
• Does your engine run poorly, hesitate, and are the spark plugs coated in oil or white residue upon investigation? This could also signal a head gasket leak.

Options for Repairing a Head Gasket

A leaky head gasket can sometimes be repaired with a Head Gasket Sealant Kit. These products can be used to fix a minor head gasket leak, and are typically administered via your vehicle's cooling system. They usually recommend performing a full cooling system flush and refill with fresh coolant. Once you've done this, simply follow the instructions on the kit.

However, you should be 100% sure that your engine issues are caused by a head gasket leak and not by any other issue, as not only would you be wasting your money, but incorrect use of a head gasket sealant kit can cause other issues with your engine down the line. You should also ensure that your engine is properly warmed up prior to using the kit. The instructions will typically indicate this.

How Much Would a Gasket Cost to Replace

The cost of replacing a head gasket with a brand new part, plus the associated parts, sealants, and labor, can typically be around $1,500 to $5,000. The job can require eight to ten hours of labor, sometimes more, so if you're a competent DIY mechanic and confident in your abilities, you can save some money on labor costs by doing it yourself.

We've got a range of head gasket sets that include all the components that you'd need to perform the repair on your own, and you can talk to our friendly experts for extra advice. However, if you've got doubts about your ability to perform the job, we strongly recommend visiting a garage. A head gasket repair or replacement can cause further damage to your engine if performed incorrectly.

4 Wheel Parts has Everything You Need for Repairs

It's hard to find a one-stop shop that caters to your repair needs, but that's just what 4 Wheel Parts is all about. With over 90 stores nationwide, we're easier than ever to find, and if you prefer the e-commerce experience, shop online and get your parts sent straight to you. We offer a fantastic array of items from the world's best brands, coupled with competitive prices, unmatchable warranties, and friendly expert advice.