Can You Seal A Cracked Head



20 minutes to repair a motor to get you out of trouble till you can repair it permanently is more realistic and much more interesting. Im sure I wont be the only one looking at this and wondering. Steel Seal has a few specific ranges of head gasket sealers for different cylinder engines. They have been tested and found to make sure the sealer reaches deep inside your head gaskets, sealing cracks and problems even at the furthest cylinder. This is especially important as Steel Seal advertises itself as a permanent fix.

What Are The Symptoms of Cylinder Head Failure?

The symptoms of cylinder head failure are varied – it is important that drivers are able to recognise them as quickly as possible so any damage can be limited. If the cylinder head fails, it will lead to the engine (and by extension the vehicle) breaking down.

  • Drop in coolant levels
  • Drop in oil levels
  • Drop in engine performance
  • Smoke coming out of the exhaust

The most common reason for cylinder head failure is overheating caused by coolant loss, head gasket failure or restricted flow of coolant. In extreme cases a cracked or damaged cylinder head can result in terminal damage to the entire engine.

How Much Will Cylinder Head Repair Cost at a Garage?

A good garage should be able to repair and recondition a cylinder head from as little as $75, but it can also cost hundreds of dollars to do the same job. This will depend on the value of the cylinder head and the price you are quoted to repair it if it develops a crack or stops working as effectively as it should. In many cases, it may be worth simply buying a new one.

Can K-Seal Fix My Cylinder Head?

K-Seal will permanently repair most cracks or leaks in the cylinder head where there is coolant loss. You simply shake the bottle, pour and go!

Want to get hold of a bottle to fix your cylinder head? Use our simple stockist search facility and get back on the road – fast.

What Is a Cylinder Head?

A cylinder head sits on top of the engine block and covers its cylinders, thus creating the combustion chamber. The cylinder head creates the space for the passages that feed air and fuel to the cylinders, and is sealed in place by the head gasket.

Due to constantly changing temperatures and high pressure levels, the head has to be robust enough to withstand the demands placed on it without cracking or breaking. It is a complicated and vital part of the engine and vehicle as a whole, meaning that any problem it might develop should be repaired as quickly as possible.

How Does a Cylinder Head Work?

Cracked Head Gasket Fix

The cylinder head allows the engine to perform at maximum capacity by connecting to the intake and exhaust manifolds to allow the quick burn of fuel and air that moves the engine’s pistons. The intake manifold feeds air into the head, where it is combusted with fuel to produce exhaust gases, which are expelled through the exhaust manifold. It’s important that the intake and exhaust valves, which allow the entry and exit of relevant gases, open and close at the correct times to keep the engine running smoothly.

Why Do Cylinder Heads Fail?

The most common reason for cylinder head failure is overheating caused by, for example, coolant loss, head gasket failure or restricted flow of coolant. In extreme cases a cracked or damaged cylinder head can result in terminal damage to the entire engine! You must deal with any problems as soon as possible to try and prevent this from happening.

Cylinder heads can also warp because of the tremendous pressure placed on them by extreme temperature changes. This means that it is no longer providing a flat surface to hold the head gasket in the right position, which can lead to expensive problems later on in the form of major repairs or total engine replacement being required.

Warping is a particular problem for cylinder heads made of aluminium. Different engines have different levels of tolerance for cylinder head warping – some can withstand a high amount of warping while still working effectively. If your cylinder head does warp, you may be able to take it to a mechanic who specialises in realigning them – if not, you will probably need a replacement.

Could Other Parts of My Engine Be Affected?

Your cylinder head isn’t the only part of your engine that might be suffering. Select an engine part in the interactive diagram below to explore your engine and the important components that keep everything ticking over.

Click on the engine components below for detailsMore Info »

We're back with more on your cylinder head! We recently talked about when you might want to resurface your head, and now we're going to take a look at what you should do if you find that your diesel engine cylinder head has cracks between the valves.

When guys are building their engine, the cylinder head is something that comes up a lot. Read on to find out what to do if you have cracks in your head.

Need some information on a specific head? Our ASE certified techs can help!

Give Us A Call!

There can be Cracks in My Cylinder Head?

Cracks between the valves is a failure mode that we hear about a lot with cylinder heads. When we talk about cracks, we're looking at the bottom side of your head. You might see some cracks develop in between the valve seats.

Some common causes of cracks in your cylinder head are overheating and stressful operating conditions. Read our failure analysis, Why is My Head Cracked? to learn more about these causes.

These cracks can cause further issues within your engine, including oil contamination, pitting and damage to the engine block, and damage to the cylinders. This could lead to a much larger failure. Cracks in your head are definitely not something you want to ignore. But what can you do?

What do I do About Cracks in my Cylinder Head?

So you have these cracks in your head. This has most guys saying, 'Man, I gotta get a replacement set of heads.'

That's totally understandable. Who wants to put a cracked head back on the engine that you just spent a whole bunch of money on the bottom end?

But one of the things that we need to make sure is that you also fix the problem that causes the cracks in the first place.

When you have a cylinder headtypically a cast iron cylinder headthe metal doesn't just crack on its own. It doesn't just fatigue like that. Usually it cracks for a reason.

Maybe you've got a blown head gasket and it filled the cylinder with combustion gas, which displaced the coolant. This means your cylinder head can't dissipate the heat, so it overheats in that particular area where those air bubbles are forming, and it cracks the head.

Whatever the cause, make sure that you're repairing it before you replace your head, to prevent your new components from failing again.

Can you fix cracks in your cylinder head?

We get it. Replacing a cylinder head costs money. So some guys say, 'Hey, any way I can fix that crack on my cylinder head?'

Signs Of A Cracked Head Gasket

To that we say yes, cracks are fixable, but it's a much bigger process than you might think. It takes a lot of technology to get it done right.

You don't just want to weld the crack up. That's not always a solid repair. Instead, you want to use a recasting procedure, where the cracks get gouged out and the molten material gets poured back into that crack and recasts that cylinder head. It then gets remachined for a good repair.

Can You Seal A Cracked Head Gasket

Can

It's not something that most guys can do, and it's really time consuming.

That's why we carry complete cylinder heads, whether reman or new, and that's what you're going to need to get your engine back up and going for another reliable million miles. Check out our Signs You Need to Replace Your Cylinder Head, for more reasons you might need a new head.

If you're looking for help installing your diesel engine cylinder head, we have a some helpful install tips!

So when you're replacing your cylinder head, if you've got cracks, make sure you're fixing the overall problem. Check your liner protrusion and make sure you're not going to blow another head gasket. We want you to go another million miles!

Cracked Head Gasket

Want more help with your cylinder head, or another diesel engine component? We have ASE certified techs on staff to help you out! Give 'em a call at 844-304-7688, or you can request a quote online!