What is the construction and purpose of cylinder heads?

Cylinder heads are components mounted in the upper part of the engine, above the cylinder block. They consist of a body with intake, exhaust, oil, and cooling channels, as well as valve seats and guides. Their task is to seal the combustion chambers and create a workspace for valves and timing parts.

What are cylinder heads used for?

Cylinder heads are used to control gas exchange and maintain the tightness of combustion chambers. They enable proper air intake, exhaust discharge, and cooperation with valves and camshafts. Without a correctly selected head, the engine may lose compression, overheat, or run unevenly.

What role does the head gasket play?

The head gasket is an element mounted between the block and the head, whose task is to seal the combustion chambers and separate oil and cooling channels. It affects the maintenance of compression and the proper circulation of operating fluids. Its compatibility must be checked together with the engine type, channel layout, and contact surface.

How to choose a cylinder head for a specific car version?

It is best to compare the OEM part number, engine code, fuel type, and equipment completeness. It is also worth checking interchangeable numbers, channel layout, mounting points, and compatibility with the manifold, injectors, or camshafts.

What symptoms may indicate a problem with the cylinder head?

Typical symptoms include a drop in compression, coolant loss, engine overheating, and oil mixing with coolant. Difficulties with starting, uneven operation, and leaks around the head gasket area are also significant.

What data in the offer should be checked before ordering a cylinder head?

Information about the brand, condition, OEM part number, interchangeable numbers, and fuel type is useful. Additionally, it is worth verifying whether the offered element is complete, what mounting points it has, and which engine version and equipment it is compatible with.

Engine heads

At Global Parts, we offer a wide selection of original used car parts, including cylinder heads for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Each cylinder head we offer undergoes quality control to ensure you receive a top-quality product.

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BMW E46 E81 E87 116i 316i N45 Engine Ignition Coil Spark Plug Cover 7530743

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Engine Acoustic Cover BMW F20 F21 F22 F30 F31 F32 Petrol N20 Trim Panel 8610473

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Part no. 8610473

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Part no. 7796408

Vent Pipe BMW E60 LCI E90 335d X6 E71 35dX M57N2 Cylinder Head 7796408

PLN 94.95

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Engine Acoustic Cover BMW F10 F20 F21 F22 F30 F32 Diesel B47 Trim Panel 8514202

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Part no. 8514202

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BMW 1 3 X3 Series E83 E87 E90 E91 1 N46 Petrol Engine Acoustic Cover 7523714

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Part no. 7523714-1

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BMW 1 3 Series 2 E46 E81 E87 116i 316i N45 Engine Ignition Coil Cover 7530743

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Part no. 7530743-2

BMW 1 3 Series 2 E46 E81 E87 116i 316i N45 Engine Ignition Coil Cover 7530743

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Engine Cover Mercedes W203 W204 M271 Cylinder Head Rocker Panel A2710101030

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Part no. A2710101030

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Mercedes Sprinter W906 OM651 Vent Pipe Hose Cylinder Head A6510100882

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Part no. A6510100882

Mercedes Sprinter W906 OM651 Vent Pipe Hose Cylinder Head A6510100882

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BMW 1 3 Série E46 E81 E87 116i 316i N45 Moteur Bobine D'Allumage Bougie Housse

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Part no. 7530743-1

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Crank Cover Mercedes W204 W639 W906 OM651 Engine Timing Case Bottom A6510110108

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Part no. A6510110108

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BMW E60 E81 E87 E90 E91 E92 F10 F11 Engine Covering Plate 7527742

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Part no. 7527742

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Mercedes SLK R171 W204 W211 Petrol Engine M271 Camshaft Timing Front Case Cover

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Part no. A2710160806

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BMW F30 F32 Diesel N57N N57Z Engine Acoustic Cover Trim Insulation Panel 8511484

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Part no. 8511484-1

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Vent Pipe Mercedes W203 W212 M271 Cylinder Head Breather Line Hose A2710160481

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Part no. A2710160481

Vent Pipe Mercedes W203 W212 M271 Cylinder Head Breather Line Hose A2710160481

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Mercedes W204 M271 Petrol Engine Cylinder Head Cover Panel A2710101730

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Part no. A2710101730

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Crank Cover Mercedes W906 OM651 Engine Timing Case A6510150602

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Part no. A6510150602

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Part no. 7835517

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BMW F30 F32 N57N N57Z Diesel Engine Acoustic Cover Trim Insulation Panel 8511484

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Part no. 8511484

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Engine Cover BMW E70 LCI E71 F25 30dX N57 Acoustic Insulation Trim Panel 7812063

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Part no. 7812063-1

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Audi A4 B8 A6 C7 VW Golf Mk6 Engine Camshaft Carrier Plate 2.0 TDI 03L103286

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Part no. 03L103286

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Part no. A6510108918

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Oil Pan Mercedes W906 OM651 Diesel Overcasing Support Mount A6510141402

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Part no. A6510140800

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Engine Cover BMW E46 E81 E87 116i 316i N45 Ignition Coil Spark Plug Trim 7530743

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Part no. 7530743-3

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Crankshaft Cover Mercedes W204 W639 W906 OM651 Engine Timing Case A6510110008

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Part no. A6510110008

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Part no. 7800044-1

BMW E70 E90 LCI F10 F20 F30 N57 Engine Camshafts Cylinder Head Housing 7800044

PLN 617.95

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Part no. 7777364

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Part no. 7794700

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Audi A5 S5 8T Engine Cylinder Head Cylinders 4-6 3.0 TFSI CREC 06E103791A

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Part no. 06E103791A

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Part no. 059103264

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Crank Cover Mercedes W906 OM651.955 Engine Timing Case A6510151402

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Part no. A6510151402

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Audi S4 B9 S5 F5 Engine Cylinder Head Cylinders 4-6 3.0 TFSI CWGD 06M103061P

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Part no. 06M103061P

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Cylinder Head Mercedes CL203 C208 C209 Rocker Cover R1120510008

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Part no. R1120510008

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Audi A5 S5 8T Camshaft Carrier Support Cover Panel 4-6 Cyl. 3.0 Petrol 06E103285

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Part no. 06E103791A-1

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Cylinder Head Mercedes CL203 C208 C209 Rocker Cover R1120510108

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Part no. R1120510108

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Audi A5 S5 8T Engine Cylinder Head Cylinders 1-3 3.0 TFSI CREC 06E103792A

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Part no. 06E103792A

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Part no. 3C1Q6019AA

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Audi A3 S3 8V Engine Cylinder Head 2.0 TFSI Petrol Engine CJXC 06K103264

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Part no. 06K103264

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Volkswagen Touareg 7L Engine Acoustic Cover Trim Insulation 070103905A

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Part no. 070103905A

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Delivery: Aug 13

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Audi S5 F5 Rocker Camshaft Cover Housing Cylinders 4-6 3.0 TFSI CWGD 06M103061AK

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Part no. 06M103061AK-1

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Part no. 1740108

Cylinder Head Ford Transit MK7 2.2 TDCi RWD Diesel Engine 1740108 BK3Q-6090-AC

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Mercedes Vito W639 OM651 Vent Pipe Cylinder Head Breather Line Hose A6510100382

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Part no. A6510108318

Mercedes W204 W205 C207 W212 C218 Diesel OM651 Engine Cylinder Head A6510108318

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Audi S4 B8 3.0 TFSI Petrol Engine Cylinder Head Trim Cover 06E103935C

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Engine Cover Mercedes Sprinter W906 Dampening Trim Panel Left N/S A6420162324

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Mercedes W204 W205 C207 S212 W221 OM651 Cylinder Head Diesel Engine A6510103020

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VW Volkswagen Amarok Mk2 Cylinder Block Grommet Plug MB3Q-7A828-AA

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Part no. MB3Q-7A828-AA

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BMW F10 F11 LCI F12 G11 Cylinder Head Cover Cylinder 5-8 Cover Cap Plate 7608406

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Part no. 7608406

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Engine Cover BMW F10 F13 Petrol N63 Cylinder Head Cover Cyl. 5-8 7566279

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Part no. 7566279

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Part no. PE11-10-2F0

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Mercedes W204 W212 Cylinder Head Lower Part Right O/S M272 V6 A2720106620

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Part no. A2720106620-2

Mercedes W204 W212 Cylinder Head Lower Part Right O/S M272 V6 A2720106620

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Mercedes Vito W639 OM646 Camshaft Carrier Console Shafts Set R6110160504

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Part no. A6110100436-2

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Mercedes W204 W212 Cylinder Head Upper Cover Left N/S M272 V6 A2720106520

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Part no. A2720106520-1

Mercedes W204 W212 Cylinder Head Upper Cover Left N/S M272 V6 A2720106520

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BMW E90 E92 E93 M3 S65 Cylinder Head Cyl 1-4 7838137 FOR REGENERATION !!!

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Part no. 7838137

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PLN 1,519.95

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Mercedes W204 W212 Cylinder Head Upper Cover Right O/S M272 V6 A2720106620

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Part no. A2720106620-1

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Cylinder Head Cover BMW E90 E92 E93 M3 S65 Cylinder 5-8 7838053

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Part no. 7838053

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Audi A7 4G8 3.0 TDI CVZA Diesel Engine Cylinder Head Cyl 1-3 059103064JT 0594BP

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Part no. 059103064JT

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Mercedes W204 C207 W212 M271 Upper Cylinder Head Cover A2710161406

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Part no. A2710161406

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BMW E90 E92 E93 M3 S65 Cylinder Head With Camshaft Cyl 5-8 7838147

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Part no. 7838147-1

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Mercedes W176 W246 C117 Engine Cylinder Head Rocker M270 Petrol A2700109902

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Part no. A2700109902

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PLN 2,374.95

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Engine Cover BMW F10 F13 Petrol N63 Cylinder Head Front Plate Cyl. 1-4 7566277

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Part no. 7566277

Engine Cover BMW F10 F13 Petrol N63 Cylinder Head Front Plate Cyl. 1-4 7566277

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-5%

Part no. 7530743-4

Engine Cover BMW E46 E81 E87 116i 316i N45 Ignition Coil Spark Plug Trim 7530743

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PLN 46.95

PLN 44.60

Delivery: Aug 13

If paid before 14:00

Cylinder Head Cover BMW F10 F11 LCI F12 G11 Cylinder 1-4 Cover Cap Plate 7608405

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Part no. 7608405

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BMW E87 E91 LCI E81 E90 116i 316i N43B16A Cylinder Head Planned 7559172

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Part no. 7575671

BMW E87 E91 LCI E81 E90 116i 316i N43B16A Cylinder Head Planned 7559172

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PLN 2,374.95

PLN 1,424.97

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Cylinder heads – structure, application, and impact on engine performance

Cylinder head components and their role in the combustion process and exhaust emission control

The cylinder head is one of the most important components in the construction of a powertrain. It is responsible for the proper flow of air, fuel, and exhaust gases, as well as for sealing the combustion chambers, enabling the engine to operate efficiently. Without a functional cylinder head, it is impossible to achieve optimal performance and durability of the engine unit. In the Global Parts automotive store, you will find a wide selection of used car engines, including cylinder heads matched to brands such as BMW, Audi, Mercedes, Volkswagen, Mini, and others.

What functions does a cylinder head perform?

The cylinder head is a complex component that performs many key functions:

Creating the combustion chamber – The cylinder head seals the cylinders from the top, enabling the proper combustion of the air-fuel mixture.
Managing flow – It is responsible for delivering air and fuel to the cylinders and for discharging exhaust gases through the intake and exhaust valves.
Mounting point for the timing system – It contains camshafts, valve rockers, and other components responsible for the precise opening and closing of valves.
Cooling and lubrication – It contains oil and cooling channels that prevent overheating and wear of key components. Precise manufacturing of the cylinder head and its proper maintenance are essential for the reliable operation of the engine unit.

Construction and purpose of cylinder heads

Cylinder heads are the upper parts of the engine mounted above the cylinder block. Their task is to seal the combustion chambers and create space for valves, intake ports, exhaust ports, and coolant circuits. A typical cylinder head works with gaskets and mounting parts, and its compatibility must be confirmed by the OEM number, fuel type, and engine version.

Comparison of head variants and data to check

Variant	Typical characteristics	Cooperating elements	What to check before purchase
Petrol engine head	Layout of channels and combustion chambers adapted to spark ignition	timing parts, intake manifold, spark plugs	OEM number, fuel type, number of valves, compatibility with accessories
Diesel engine head	Adapted to higher compression ratios and different combustion system operation	Injectors, manifold, gasket, fuel lines	Engine code, injector seats, contact surface, cracks
Complete head	May contain valves, camshaft, or other embedded elements depending on the version	chains, timing belts, and mounting kits, valve cover, seals	Equipment scope, mounting points, condition of guides and seats
Incomplete head	Body prepared for further equipment according to the car version	engine blocks, valves, camshafts, mounting bolts	Dimensional compatibility, oil channels, cooling channels, resurfacing

The cylinder head is made of aluminum or cast iron, depending on the model and year of production. In cars such as the BMW E46 320d, 4-cylinder heads with 2 or 4 valves per cylinder are used, integrated with cooling and oil channels. The typical weight of a head ranges from 10 to 25 kg, and the combustion chamber diameter varies in the 80–85 mm range for 2.0 l units. In sports models and M versions, heads with increased airflow and modified valve geometry are often used.

Why is it worth taking care of the cylinder head?

A damaged or malfunctioning cylinder head can lead to serious problems, such as:

Loss of compression – Causes a drop in engine power and efficiency.
Engine overheating – Resulting from leaks in the cooling channels.
Wear of valves and valve seats – Resulting in problems with fuel and exhaust flow.
Oil and coolant leaks – Which can lead to the failure of other components. At Global Parts, we offer used car engines that undergo rigorous quality tests, ensuring their durability and reliability.

The role of channels, seats, and contact surfaces in engine operation

The intake and exhaust ports in the head are responsible for directing the mixture and discharging exhaust gases, so their condition directly affects the engine's smoothness. The head contact surface is the area of contact with the engine block, which must maintain flatness and tightness after installing the gasket. When choosing an element such as a BMW E90 320i valve cover, it is worth checking the compatibility of sealing surfaces, ventilation, and mounting points in the upper part of the engine simultaneously. For example, in a BMW E46 320d cylinder head, the average compression is 18–20 bar, and the intake ports provide an airflow of 120–140 l/s at 6000 rpm. Such parameters are important for power, torque, and fuel economy. Cylinder heads are compatible with specific injection systems, intake manifolds, and head gaskets, which allows for precise part matching.

How to choose the right cylinder head?

When choosing a cylinder head, you should pay attention to several key aspects:

Compatibility with the vehicle model – Every car brand and model has its specific technical requirements. In the Global Parts automotive store, you will find cylinder heads perfectly matching BMW, Audi, Mercedes, Volkswagen, Mini, and others.
Technical condition – Ensure that the cylinder head has no cracks, damage, or signs of corrosion.
Service history – It is important that the cylinder head comes from a vehicle with a known mileage and has been regularly serviced.

Selecting a cylinder head by OEM number and equipment version

The selection of a cylinder head should take into account the OEM part number, interchangeable numbers, fuel type, and the completeness of the element. Compatibility with equipment such as camshafts, manifolds, injectors, or engine sensors and switches is also significant. If you are looking for a subassembly such as a Mini Cooper S R56 valve cover, you should compare the breather system, bolt layout, and engine version, as these features also affect the fit of the upper part of the head.

Checking cooperating components during replacement

Replacing a cylinder head involves not only the body itself but also assessing the parts that work with it. You should check the condition of the block surface, the tightness of the lubrication system, and the compatibility of accessories with seats and channels. In the case of parts such as a Mercedes W203 engine cover, the compatibility of mounts and engine bay layout is mainly important, while for the head itself, the OEM number, fuel type, and engine version remain key.

Example table of heads and basic parameters

Vehicle model	Head type	Number of valves	Material	Approximate weight
BMW E46 320d	4-cylinder, diesel	4 per cylinder	Aluminum	12–14 kg
BMW E46 330i	6-cylinder, petrol	4 per cylinder	Aluminum	18–20 kg
Mercedes C200	4-cylinder, petrol	4 per cylinder	Cast iron	22 kg
Audi A4 2.0 TDI	4-cylinder, diesel	4 per cylinder	Aluminum	13 kg

Why is it worth choosing used cylinder heads?

Used car engines, such as a cylinder head, are an excellent solution that allows for savings while maintaining high quality. By choosing Cylinder heads, you gain:

Lower costs – Used components are significantly cheaper than new ones but offer equally high quality.
Ecology – Recycling car parts supports environmental protection and reduces waste.
Wide offer – In our store, you will find cylinder heads for the most popular car brands. In practice, used heads fit original injection assemblies, manifolds, and turbochargers. Compatibility with the model and year allows for maintaining original flow geometry and compression pressure parameters.

How to take care of the cylinder head?

To ensure the cylinder head works reliably for years, it is worth following a few rules:

Regularly change the coolant to prevent corrosion of the cooling channels.
Check the condition of the cylinder head gaskets to avoid leaks and loss of compression.
Monitor the timing system operation and replace worn elements, such as camshafts or valves. If you need to replace a cylinder head, at Global Parts you will find suitable used auto parts that will restore your vehicle to full efficiency. The head assessment procedure includes:

Checking the flatness of the contact surface with the engine block (tolerance 0.05 mm).
Inspecting valves and seats for wear (valve seat diameter: 34–38 mm in E46).
Verifying cooling and oil channels for patency.
Measuring pressure tightness at 3–5 bar to detect micro-cracks.

FAQ

Question	Answer
What is the construction and purpose of cylinder heads?	Cylinder heads are components mounted in the upper part of the engine, above the cylinder block. They consist of a body with intake, exhaust, oil, and cooling channels, as well as valve seats and guides. Their task is to seal the combustion chambers and create a workspace for valves and timing parts.
What are cylinder heads used for?	Cylinder heads are used to control gas exchange and maintain the tightness of combustion chambers. They enable proper air intake, exhaust discharge, and cooperation with valves and camshafts. Without a correctly selected head, the engine may lose compression, overheat, or run unevenly.
What role does the head gasket play?	The head gasket is an element mounted between the block and the head, whose task is to seal the combustion chambers and separate oil and cooling channels. It affects the maintenance of compression and the proper circulation of operating fluids. Its compatibility must be checked together with the engine type, channel layout, and contact surface.
How to choose a cylinder head for a specific car version?	It is best to compare the OEM part number, engine code, fuel type, and equipment completeness. It is also worth checking interchangeable numbers, channel layout, mounting points, and compatibility with the manifold, injectors, or camshafts.
What symptoms may indicate a problem with the cylinder head?	Typical symptoms include a drop in compression, coolant loss, engine overheating, and oil mixing with coolant. Difficulties with starting, uneven operation, and leaks around the head gasket area are also significant.
What data in the offer should be checked before ordering a cylinder head?	Information about the brand, condition, OEM part number, interchangeable numbers, and fuel type is useful. Additionally, it is worth verifying whether the offered element is complete, what mounting points it has, and which engine version and equipment it is compatible with.

Summary: cylinder heads at the Global Parts automotive store

The cylinder head is a key element that affects the efficiency, durability, and reliability of the engine unit. The Global Parts offer includes used parts matched to many brands, including BMW, Mercedes, Audi, and others. When choosing, it is worth comparing the OEM number, interchangeable numbers, fuel type, element condition, and compatibility with engine accessories. We invite you to contact us – we are here to help you! For more information and interesting facts, we also invite you to our automotive blog.

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