How to Choose the Right Cylinder Head for Your Car

The cylinder head is one of the most critical and complex components of an automotive engine. It closes the cylinder block, forms the combustion chambers, and houses the valvetrain (valves, springs, and camshafts).

Operating under extreme temperatures and high pressure, the cylinder head can fail over time due to overheating, cracks, or warpage. Choosing the wrong part can lead to poor engine performance or even complete engine failure.

In this article, we will break down how to choose the right cylinder head for your car so that your engine runs like clockwork.

Method #1: Selection by VIN (Most Reliable)

If you want to protect yourself from mistakes completely, search using your vehicle's VIN (Vehicle Identification Number). This unique 17-digit code is found in your car registration documents, under the windshield, or on the driver's side door pillar.

Why is this important? Even within the same production year and model, manufacturers often use different engine modifications. A VIN search ensures that the system or store manager finds the exact cylinder head that came with your vehicle from the factory.

Method #2: Search by Engine Code and Car Specs

If the VIN is unavailable, you can select the part based on basic technical specifications:

• Car make and model;
• Year of manufacture and body type;
• Engine displacement, fuel type (petrol, diesel, LPG), and number of valves (e.g., 16V);
• Engine code. This alphanumeric designation (e.g., 2.5 CRDi with code D4CB, or 2.4D with code AAB) is stamped on the engine block or listed in the car documents.

Method #3: By Original OEM Part Number

If the old cylinder head has already been removed at a repair shop, inspect its housing. Manufacturers stamp or cast the original part number (OEM number) onto the surface. Entering this number into an auto parts store's search bar is a direct path to an exact match.

What to Look for When Buying a Cylinder Head?

When choosing a cylinder head, car owners usually choose between three main options:

1. New Original (OEM) Cylinder Head. It offers maximum resource and factory quality, but its price is often quite high.
2. New Aftermarket Cylinder Head. Modern certified brands offer high-quality duplicates that cost less than the original but are practically just as reliable.
3. Used Cylinder Head (from a salvage yard). An economical option, but it comes with risks. When buying a used part, it is mandatory to take it to a specialized workshop for pressure testing (checking for internal microcracks) and surface flatness check.

Important Nuance: Cylinder Head Assembly Types

Note that cylinder heads are sold in two assembly options:

• Bare Cylinder Head. This is just the bare metal casting. You will have to transfer all valves, springs, camshafts, and seals from your old part or buy them separately.
• Complete Cylinder Head Assembly. A fully assembled unit with valves, springs, and camshafts installed. It is more expensive but saves significant time on repair and reduces labor costs at the mechanic shop.

Summary and the Golden Rule of Engine Repair

Choosing a cylinder head requires precision. Remember that along with a new or used head, you must always purchase a new cylinder head gasket, new cylinder head bolts (old bolts stretch when tightened and cannot be reused), and a new valve cover gasket.

If you are unsure about your choice, leave it to the professionals. You can browse the suitable parts yourself in our Cylinder Heads catalog section, or contact the experts at the AUTOStart-1 online store. We are always ready to help you check part compatibility by VIN code and select the best option for your budget!

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