Contain combustion pressure right where the cylinder head meets the block with the APEX Automobile Parts Inc Cylinder Head Gasket AHG1148, a 2007-2013 Mazda 3 2.3L cylinder head gasket that is also cataloged for the 2007-2012 Mazda CX-7 2.3L and 2006-2007 Mazda 6 2.3L. It installs as a direct-fit replacement for these listed applications, all equipped with the L4-2.3L engine.
- Part type: Cylinder head gasket, listed by APEX simply as "Head Gasket".
- Engine: L4-2.3L on every listed application.
- Quantity per application: 1. The listed applications use one head gasket.
A head gasket sits between the cylinder head and the engine block. It seals the combustion chambers and keeps coolant and oil in their own passages. Signs this part may need replacing include coolant loss with no visible leak, white exhaust smoke, overheating, milky engine oil, or bubbles in the coolant reservoir. These symptoms can have other causes, so confirm the diagnosis first, for example with a compression or leak-down test and a cooling-system pressure test. If a failed head gasket is the cause, this gasket replaces it.
Replacing the gasket requires removing the cylinder head. Follow the vehicle service information for surface inspection and preparation and for the torque sequence. Consult it as well for the correct head bolts and whether they may be reused.
Frequently Asked Questions
Is this the right cylinder head gasket for a 2006-2007 Mazda 6 2.3L?
It is listed for the 2006-2007 Mazda 6 with the L4-2.3L engine. Check the "Vehicles it fits" section to confirm your exact vehicle.
What does an engine cylinder head gasket do?
It seals the joint between the cylinder head and the engine block. It contains combustion pressure and keeps coolant and oil in their separate passages.
What are signs a head gasket may need replacing?
Signs include unexplained coolant loss, white exhaust smoke, overheating, milky oil or bubbles in the coolant reservoir. These can have other causes, so diagnose the engine before replacing the gasket.
How many head gaskets does the L4-2.3L engine use?
The listed L4-2.3L applications use one head gasket per engine.
What should I know before installing it?
The cylinder head has to be removed. Follow the vehicle service information for surface preparation, the torque sequence, the correct head bolts and whether they may be reused.
