PCM 5.7L Coolant Reservoir Cap - Degas Bottle

Replace a worn or leaking coolant cap with this OEM-style PCM 5.7L coolant reservoir (degas bottle) cap. A properly sealing cap helps maintain correct cooling-system pressure, supports stable operating temperatures, and reduces the risk of coolant loss from the expansion tank. Ideal for preventative maintenance or as a direct replacement when the original cap is cracked, stripped, or no longer holds pressure.

• Product: Coolant reservoir / degas bottle cap
• Engine fitment: PCM 5.7L applications
• Type: OEM-style replacement cap
• Location: Expansion tank / degas bottle
• Brand/Vendor: PCM

Common symptoms of a failing coolant cap: coolant smell, residue around the reservoir neck, frequent top-offs, or overheating due to improper system pressure.

FAQ:
Is this the radiator cap? No—this cap is intended for the degas/expansion reservoir used on PCM 5.7L cooling systems.
What should I verify before ordering? Confirm your engine is PCM 5.7L and that your reservoir uses a degas bottle style cap connection.