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What is a cylinder head gasket?


The cylinder head gasket is the connection from the engine to the cylinder head. It ensures that the combustion chamber is sealed so that no gases escape. In addition, it also seals the cooling water and engine oil lines. A cylinder head gasket thus prevents oil and cooling water from mixing or pollutants from leaking out. In the lower section of the page, we highlight why cylinder-head gaskets go defective and how to detect defects. We also give tips on what to look out for when buying a cylinder-head gasket.

How can a cylinder head gasket go defective and what are the symptoms of this?
What to consider when buying cylinder head gasket?

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Motordichtungssatz PORSCHE Boxster Cayman 987 S 3.4 M97.21 M97.22

inkl. Zylinderkopfdichtung & ORIGNAL Kurbelwellendichtring

Item No.: A09313W800
Manufacturer: ZUFFENHAUSEN PARTS
part number: nicht zutreffend
Fuer_Motornummer: M97.21/22
Baugruppe: Kurbelgehäuse
Verwendung: Motor
Mengeneinheit: Stück
539,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
add to cart

ELRING Zylinderkopfdichtung + Schrauben BMW F20 F21 E90 F30 F10 N47 DIESEL

auch für MINI R55-61 COOPER D & COOPER SD

Item No.: PKT862W503
Manufacturer: ELRING
part number: 019.321, 233.370
Delivery:

  • 1x Gasket, cylinder head Piece - ELRING 019.321
  • 1x Bolt Kit, cylinder head Piece - ELRING 233.370
93,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
add to cart

REINZ Zylinderkopfdichtung Satz für PORSCHE 924 2.0 125 PS 11.1975-08.1989

inkl. Ventilschaftabdichtung | PORSCHE: 047 198 012 A

Item No.: A09313W002
Manufacturer: VICTOR REINZ
part number: 02-25095-02
EAN-Code: 4026634005552
Baugruppe: Zylinderkopf
Mengeneinheit: Stück
64374267: mit Ventilschaftabdichtung
73,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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HERTH+BUSS JAKOPARTS Zylinderkopfdichtung Satz KIA Picanto (BA) 1.0 1.1 61/63/65 PS

Item No.: UNI933W191
Manufacturer: HERTH+BUSS JAKOPARTS
part number: J1240334
Baugruppe: Zylinderkopf
Material: Stahl
Mengeneinheit: Stück
59,95 EUR

incl. VAT, excl. shipping costs

short term available / 3-4 working days
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ELRING Zylinderkopfdichtung Satz + Schrauben AUDI SEAT SKODA VW 1.4 / 16V

ELRING: 167.770 + 803.740

Item No.: PKT672W707
Manufacturer: ELRING
part number: 167.770, 803.740
Delivery:

  • 1x Gasket Set, cylinder head Piece - ELRING 167.770
  • 1x Bolt Kit, cylinder head Piece - ELRING 803.740
71,45 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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ELRING Zylinderkopfdichtung Satz + Schrauben AUDI A3 SEAT SKODA VW Golf 4 1.8 T

auch A4 A6 EXEO IBIZA LEON OCTAVIA SUPERB PASSAT POLO

Item No.: PKT872W386
Manufacturer: ELRING
part number: 461.380, 130.830
Delivery:

  • 1x Gasket Set, cylinder head Piece - ELRING 461.380
  • 1x Bolt Kit, cylinder head Piece - ELRING 130.830
82,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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2x Buchse Zylinderkopfdeckel OPEL Astra Corsa Meriva Signum Tigra Vectra Zafira

für BENZINER | entspricht OPEL: 6 07 812 / 90412868

Item No.: PKT162W820
Manufacturer: AIC
part number: 52248
EAN-Code: 4046283522484
Delivery:

  • 2x Bush, cylinder head cover Piece - A.I.C. Competition 52248
6,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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HERTH+BUSS JAKOPARTS Zylinderkopfdichtung für NISSAN 350 Z PATHFINDER III 3.5 l

Item No.: UNI953W062
Manufacturer: HERTH+BUSS JAKOPARTS
part number: J1251026
Dicke_Staerke_mm: 0,60
Baugruppe: Zylinderkopf
Verwendung: Motorblock
Material: Metall
Mengeneinheit: Stück
39,95 EUR

incl. VAT, excl. shipping costs

Currently not available at the time

HERTH+BUSS JAKOPARTS Zylinderkopfdichtung Satz J1248003 für Suzuki Samurai SJ 4

Item No.: UNI933W630
Manufacturer: HERTH+BUSS JAKOPARTS
part number: J1248003
Baugruppe: Zylinderkopf
Mengeneinheit: Stück
50,95 EUR

incl. VAT, excl. shipping costs

Currently not available at the time

HERTH+BUSS JAKOPARTS Zylinderkopfdichtung Satz für KIA RIO 2 + STUFENHECK 112 PS

Item No.: UNI933W196
Manufacturer: HERTH+BUSS JAKOPARTS
part number: J1240342
Baugruppe: Zylinderkopf
Material: Metall
Mengeneinheit: Stück
103,95 EUR

incl. VAT, excl. shipping costs

Currently not available at the time

HERTH+BUSS JAKOPARTS Zylinderkopfdichtung für TOYOTA ES CAMRY + STATION WAGON

auch für LEXUS ES

Item No.: UNI833W917
Manufacturer: HERTH+BUSS JAKOPARTS
part number: J1252034
Dicke_Staerke_mm: 1,6
Baugruppe: Zylinderkopf
Bohrung_mm: 90,25
Verwendung: Motorblock
Material: Graphit
Mengeneinheit: Stück
21,95 EUR

incl. VAT, excl. shipping costs

short term available / 3-4 working days
add to cart

REINZ 01-26035-03 Motordichtungssatz für PORSCHE 928 5.0 S 288 PS 92810090102

inkl. Ventilschaftabdichtung & Wellendichtring-Kurbelwelle

Item No.: A09413W512
Manufacturer: VICTOR REINZ
part number: 01-26035-03
EAN-Code: 4026634001783
Baugruppe: Kurbelgehäuse
Verwendung: Motor
Mengeneinheit: Stück
64374267: mit Ventilschaftabdichtung
307,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
add to cart
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How can a cylinder head gasket go defective and what are the symptoms of this?

Normally, a cylinder-head gasket lasts the life of a car. But external influences can shorten its service life, sometimes considerably. For example, a defective water pump or thermostat, as well as too little coolant, can cause the cylinder-head gasket to overheat. Likewise, poor assembly or incorrect torque when tightening the cylinder head bolts can cause the cylinder head gasket to become defective. Long idle periods, for example in seasonal vehicles, can also cause damage. In addition, irregularities in the combustion process have an impact on the cylinder-head gasket. This can be caused by low-grade fuel, for example.

Then either fluids get into the engine or combustion chamber, exhaust gases get into the fluids, or the cooling water and engine oil mix. If engine oil gets into the cooling water, channels can become clogged and cooling performance can drop. On the other hand, if cooling water gets into the engine oil, the oil loses its lubricating ability. In addition, it is also possible for the fluids to enter the combustion chamber. In the case of cooling water, it evaporates in the combustion chamber and is emitted with the exhaust gases as white smoke. However, if too much water enters the combustion chamber, it can damage the pistons, since the compression of the water has a higher density. The other way around, it is also possible for the combustion gases to get into the cooling water, causing bubbles to form there. If, on the other hand, engine oil is also burned, it produces a bluish exhaust smoke. In all cases, it can have direct and fatal effects on the engine. Therefore, pay attention to the following symptoms that may indicate a defective cylinder-head gasket:

  • Loss of engine power
  • High rise in cooling water temperature
  • High increase in engine temperature
  • Poor cold start behavior
  • Too fast loss of engine oil and coolant

If these symptoms occur, you can perform an initial visual inspection. To do this, with the engine switched off and cooled down, check whether fluids are leaking around the engine block. In addition, look in the expansion tank of the coolant, whether dark streaks run through the water, the coolant has an oily surface or foam has formed, then engine oil is in the coolant. If you open the cap and there is an odor of exhaust gases, gas from the combustion chamber has entered the coolant. A high pressure when opening the tank also indicates gases in the cooling system.
If there is cooling water in the engine oil, a yellowish foamy or gel-like substance will form on the cap and it can also be seen on the dipstick. If the above symptoms are noticeable or if one of the points is noticed during the visual inspection, it is urgently advisable to visit a workshop as soon as possible, as this can prevent subsequent engine damage.

What to consider when buying cylinder head gasket?

Since a cylinder-head gasket is exposed to high temperature differences and high pressures, high demands are placed on material and fitting accuracy. Here it pays to use high-quality branded goods, as brand manufacturers always meet the specifications of the vehicle manufacturers. The important brand manufacturers for cylinder-head gaskets include:

When buying a cylinder-head gasket, it is very important to pay attention not only to the quality but also to the material thickness, as this differs from vehicle to vehicle.

Basically, it takes a lot of time to replace a cylinder head gasket, since you have to remove parts from the engine block and relevant assemblies. Depending on the vehicle, the timing belt and the water pump may also be involved. If these are already dismantled, it makes sense to change them directly with, because so only the material costs come with on top, but nothing changes appreciably in the work performance. The valve clearance of the intake and exhaust valves should also be checked in this context and readjusted if necessary. In addition, it is advisable to change engine oil as well as the cooling water and, if necessary, the valve stem seals. If oil residues are visible in the cooling circuit, cleaning of the cooling system is required before replacing the cooling water. Replacing the cylinder head gasket requires a high level of expertise, experience and patience.

To find the right spare part when buying cylinder head gasket, you can enter the part number in our search mask, if known. Otherwise, select your vehicle so that you will only be shown matching spare parts. In addition to the cylinder head gaskets of the above brand manufacturers, we also carry sets with the matching cylinder head bolts or the complete cylinder head gasket set. If you are unsure which cylinder head gasket to buy, please contact our customer service with the 17-digit chassis number. They will be happy to help you choose the right spare part.