Seal the critical joint between head and block with the APEX Automobile Parts Inc AHG548, a 2000-2006 Nissan Sentra 1.8L cylinder head gasket for the L4-1.8L engine. It is a direct-fit replacement for the 2000-2006 Nissan Sentra equipped with the L4-1.8L engine.
- Part type: Head gasket
- Engine: L4-1.8L
- Quantity per application: 1 (the listed application uses a single head gasket)
What it does: This engine cylinder head gasket sits between the cylinder head and the engine block. It is designed to hold combustion pressure inside the cylinders. It also keeps the coolant and oil passages that run through that joint sealed from each other and from the outside.
Signs this part may need replacing: Look for coolant loss with no visible external leak, white exhaust smoke, overheating, milky or contaminated oil, bubbles in the coolant reservoir, or low compression on one or more cylinders. Other faults can cause these symptoms, so diagnose the cause before replacing.
Installation note: Head gasket replacement is a major job. Follow the vehicle service information for surface preparation, tightening sequence and torque values. Check the same source for the correct head bolts and whether they may be reused.
