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How To Fix Your Porsche’s Cracked Cylinder Head

Porsche Engine Misfire

Owning a Porsche is a dream come true for many people who enjoy the thrill of driving a high-performance vehicle. However, these vehicles can experience issues like a cracked cylinder head. A cracked cylinder head can lead to serious engine problems and even complete engine failure if not fixed immediately. Before we dive into how to fix a cracked cylinder head, we need to understand what it is and how it works.

What is a Cylinder Head and How Does it Work?

The cylinder head is an engine component that sits on top of the engine block. It contains the intake & exhaust valves, combustion chambers, and spark plugs. The cylinder head is responsible for sealing the cylinders and allowing fuel and air into the combustion chamber while letting exhaust gases out.

What Causes a Cracked Cylinder Head?

Several factors can cause a cracked cylinder head. Overheating is the most common cause of a cracked cylinder head. When the engine overheats, the cylinder head can warp, crack, or even become porous. Another common cause of a cracked cylinder head is improper engine maintenance. If the engine is not regularly maintained, it can lead to corrosion, which can cause cracks in the cylinder head.

How to Identify a Cracked Cylinder Head

As a Porsche owner, you need to be able to detect a cracked cylinder head as soon as possible to prevent further damage to your Porsche’s engine. Here are some signs of a cracked cylinder head:


  • White Smoke from Exhaust: If you notice white smoke coming from the exhaust pipe, it’s a sign that there is a problem in the engine. A cracked cylinder head can make coolant leak into the combustion chamber, resulting in white smoke from the exhaust pipe. The white smoke may also have a sweet smell due to the presence of coolant.
  • Loss of Coolant: A sudden coolant loss without any visible leaks may be a sign of a cracked cylinder head. The coolant can leak into the combustion chamber or the oil, causing a low level of coolant without any apparent leaks.
  • Engine Misfires: If the engine of your vehicle misfires or stalls, it could be a telltale sign that the cylinder head is cracked. This happens when the combustion chamber loses compression due to the crack in the cylinder head.
  • Engine Overheating: A cracked cylinder head can cause engine overheating, as it can prevent proper coolant circulation through the engine. Overheating can cause further damage to the engine and should be addressed immediately.
  • Loss of Engine Power: A crack in the cylinder head can cause a loss of engine power because the crack affects the proper combustion of fuel in the engine.


How to Fix a Cracked Cylinder Head

Fixing a cracked cylinder head requires a high level of expertise and specialized tools. It’s not a DIY job, and it’s recommended to have it fixed by a professional mechanic. Here are the steps involved in fixing the problem:


  • Remove Cylinder Head: The first step is to remove the cylinder head from the engine block. The mechanic will drain the coolant and oil and disconnect the hoses and electrical connections. They will then remove the bolts that secure the cylinder head to the engine block and carefully lift the cylinder head off the block.
  • Inspect the Cylinder Head: Once the cylinder head is removed, it needs to be inspected thoroughly. The mechanic will look for signs of cracks, warping, or other damage. If the cylinder head is beyond repair, it must be replaced.
  • Repair It: If the cylinder head is repairable, the mechanic will perform the necessary repairs. Depending on the extent of the damage, the mechanic may need to weld the cracks or use a specialized adhesive to seal the cracks. They will also inspect the valve seats and guides and replace them if necessary.
  • Reinstall it: The cylinder head is reinstalled with a new head gasket.


Book An Appointment with Glenwood Foreign Car for Cylinder Head Issues

At Glenwood Foreign Car, we are Porsche Cylinder Head Inspectiona reliable and experienced auto repair shop and we can fix your car’s cracked cylinder head. Our team of skilled technicians has the expertise to diagnose and repair any issues with your car’s engine, ensuring it runs smoothly and efficiently. We provide high-quality repairs to residents from Upper Makefield Township, Yardley, Newtown, and Morrisville, PA. Book an appointment with us today!

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