Cylinder head symptoms help you to detect a falling head. The causes of these signs vary and depend on the type of damage. Faulty cylinder head symptoms should not be taken lightly. A damaged head can affect a vehicle’s engine performance, or even reduce its lifespan. Learn about signs that show a bad cylinder head here. We also included a section about how to prevent damage at the end of the article.
Causes of Cylinder Head Problems
What makes a cylinder to become faulty? There are many reasons. The main ones are:
Having discussed the causes of cylinder head problems, let us now see about the signs to look out for. The symptoms are divided into categories. There are those that show a cracked head, warped head, porous head, and head gasket wear or damage.
Source: http://www.mig-welding.co.ukCracks can happen on a cylinder head due to various reasons. Mostly, high temperature causes them. Temperature fluctuations, too, that cause the cylinder head to heat up then cool rapidly. Old age is also another reason for appearance of cracks. If the head is made of aluminum, then the more likely it is to crack. Signs that indicate a cracked cylinder head include:
A cracked head does not necessarily need to be changed. It can be repaired easily, and at your local automobile repair shop. Smalls cracks are taken care of using a process called pinning. Larger cracks can be fixed by welding if the head is made from aluminum. Severe cracks on iron Cylinder Heads are repaired using furnace welding or the flame spray method.
Just like cracking, overheating is a major cause of a warped cylinder head. Some warping problems are the result of the mistakes of car owners. Many people falsely think that pouring water into the radiator can help cool the engine faster. But that only causes a rapid temperature fluctuation, leading to a warped or even cracked head.
To tell if a cylinder head is warped, check the area between the head and the gasket. The two parts should be flush. If they are not, you have a warped head. Alternatively, you can check the straightness of the head using a square. It is an easy procedure that also gives relatively accurate results. A warped cylinder head is usually repaired by machining. The process removes the raised parts to produce an even surface. This can be done at most vehicle repair facilities.
Gases or contaminants during casting can cause a cylinder head to become porous. The contaminants create voids. These voids may open to the outside of the cylinder head. However, resurfacing the head can reveal them.
When voids and holes become exposed, they may leak coolant or oil. Bad cylinder head symptoms could then begin to appear. Porous cylinder head symptoms include low levels of coolant, contaminated oil that appears milky, and overheating of the head and engine block.
Just like cracks, exposed voids can be fixed. Porous cylinder head repair involves filling the holes with a sealing material. And if they are too large, you may decide to replace the cylinder head. Aluminum heads are more prone to porosity than those made from iron.
Source: http://freelance-designz.comThe functions of the cylinder head gasket match that of the cylinder head: heat transfer, taking in compression pressure of the expanding gases, and more. When the gasket blows, the signs that appear are closely related to those shown by a failing cylinder head.
What causes a blown head gasket? The problem often occurs when the engine block and the head expand unequally, creating a gap between them. If the engine block and cylinder head feature different materials, the likelihood of gasket issues increases.
A damaged cylinder head gasket can also result from poor workmanship where seam does not provide a strong seal. Blown cylinder head symptoms are many and varied. They include:
Can you drive with a blown head gasket? Well, you can, but only if you are ready to foot hefty engine repair costs. As we have seen, one of the signs that the gasket is blown is an overheating engine. Driving with such a gasket can, therefore, mean damage to cylinder block components.
A bad head gasket can be fixed, and easily. Compared to the cost to take care of damaged engine parts, cylinder head gasket repair is way cheaper. Alternatively, you choose to replace the damaged part. The cylinder head gasket price is still lower than the amount to fix a damaged engine, which is all the more reason to opt for repair.
Keeping the cylinder head on good condition is easier than having it repaired or replaced- and less expensive. Follow these tips to ensure that.
1. Maintain your engine to prevent overheating instances. High temperature levels and fluctuations are major causes of cracked cylinder heads, warping, and other forms of damage.
2. If your engine overheats, avoid driving on. The best thing to do is pull up, switch off the engine, and wait for it to cool.
3. Avoid pouring water directly into the car radiator while hot to either cool or fill it up. The resulting contraction and thermal stress can cause the cylinder head to crack or warp. Wait until it cools completely then add water.
4. Always ensure the radiator is working properly, filled, and its cap is tightly sealed. A failed radiator can cause dangerous overheating and a cracked or warped cylinder head.
5. Ensure the engine thermostat is working correctly at all times. The fan too, and the belts. Leaking hoses should also be fixed.
6. Have the cylinder head inspected regularly and cracks repaired. If there are warped parts, have them machined. Severe damage can mean higher cylinder head repair costs.
7. Use the right bolts to secure the cylinder head to the engine block. It creates a tight seal and prevents the problems associated with loose seams, such as leaks.
8. Always ensure the cylinder head gasket is also in good condition. A broken gasket can lead to cylinder head and engine problems. Care tips include avoiding high temperature levels and fixing mild forms of damage.
9. If the cylinder head is too old, say 5 years or more, have it changed.
Cylinder heads do not last forever. They can also get damaged. Because a bad cylinder head affects engine performance, care should be taken to prevent failure. The cylinder head symptoms described here should help detect damage before it becomes severe. Doing so would save your car’s engine and help you avoid expensive repairs. To prevent unnecessary damage, make use of the head maintenance tips described here.
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