Precision Engine Head Seal for Classic Nissan Performance
Keep combustion tight and coolant clean with this premium engine head seal, engineered to OE geometry for Nissan powertrains. It maintains cylinder pressure, isolates oil and coolant passages, and protects your motor under daily use or spirited driving . Ideal for rebuilds, overheating fixes, or preventative maintenance.
Why you need it
A healthy head seal preserves compression, prevents hot-gas blow‑by, and stops coolant–oil cross‑mixing. The result is stable power, clean emissions, and reliable temperature control. It’s essential after head removal, overheating, or when chasing misfire and loss of power.
How it works
Multi-layer steel with graphite faces and embossed sealing beads compresses evenly when torqued. Integrated fire rings lock each cylinder, while dedicated beads surround coolant and oil galleries. Proper clamping keeps the head and block mated, sealing from idle to redline.
What happens if it breaks ⚠️
Expect overheating, white exhaust, sweet smell, bubbling in the radiator, milky oil, misfires, and hard starts. Coolant loss can wipe bearings and warp the head; continued driving risks cracked decks and costly repairs.
Tech tips
Check deck flatness with a straightedge, resurface if out of spec, and clean mating faces thoroughly. Always use new head bolts (TTY where applicable) and follow factory torque‑angle in the proper sequence from center outward. Bleed the cooling system and verify fan and thermostat operation .
Compatibility
- Skyline
- Laurel
- Cefiro
- Firelady Z
- Laurel Altima
