Search result for: 12030R70A00
PKG SET,HEAD COVE
Part number: 12030R70A00
Availability: 0
Weight, kg: 0.115
Make: Honda
Made in: Japan

Engine Cylinder Head Cover Gasket Set οΈ
This gasket set is needed to seal the cylinder head cover to the top of the engine, keeping engine oil inside and dirt out. It also helps the PCV/breather system work correctly by maintaining stable crankcase pressure. A clean, tight seal prevents oil smell, smoke, and messy leaks that can reach the exhaust area.
How It Works
The molded rubber/silicone seals sit in the cover groove and compress evenly when the cover bolts are tightened to spec. This compression fills tiny surface gaps caused by heat cycles and vibration, stopping oil from escaping around the cover, bolt holes, and end corners. Proper sealing protects ignition parts and keeps the engine bay dry.
If the Seal Is Worn or Broken β οΈ
- Oil leaks down the engine, causing burning-oil odor and possible smoke
- Misfires from oil entering spark plug tubes or wetting coils
- Low oil level over time, risking internal wear
- Vacuum/PCV issues leading to rough idle and increased oil consumption
Technician Tip β
Clean both mating surfaces, avoid over-tightening, and check the cover for warpage. Replacing seals early is cheaper than chasing repeat leaks.
Compatible Models
- Legend
- Pilot
- Accord
- Odyssey
- Crosstour
- Ridgeline
- Legend 4D
- Inspire
- Honda Pilot
