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ACDelco GM Original Equipment 9 P.S.I. Radiator Surge Tank Cap RC108

GM Original Equipment


An ACDelco GM Original Equipment Radiator Surge Tank Cap is a GM-recommended replacement for your vehicle’s original component. It seals the radiator surge tank in your vehicle, which is a part of most radiator systems, and cools off the engine. This original equipment radiator surge tank cap has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Pricing: $15.13


9 P.S.I. Radiator Surge Tank Cap

Get the GM quality you know and trust with ACDelco GM Original Equipment Thermostats and Caps. Stay with the brand of parts your General Motors vehicle came with and get peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Thermostats and Caps are engineered for virtually every model of GM car, light duty truck, and sport utility vehicle.

Warranty: 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see for more details.

Features & Benefits:

  • Seals the radiator surge tank in your vehicle, which is a part of most radiator systems and cools off the engine
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function


Q: Do I need to replace the radiator cap after changing or flushing the coolant in my vehicle?
A: Yes, always use the correct radiator cap for your application. When changing or flushing your coolant, a new radiator cap or thermostat should be considered.

Q: Could a damaged radiator pressure cap cause damage to my vehicle?
A: Yes, a damaged radiator pressure cap could cause your engine to overheat.

Q: Could a missing radiator cap cause coolant leakage?
A: Yes, and these leaks could lead to overheating and engine damage.

Maintenance & Troubleshooting

Signs of Wear & Troubleshooting

  • Signs of wear include:
    • Coolant leak or loss
    • Steam venting from radiator or surge tank cap
    • Engine overheating

Good Maintenance Practices

  • Maintain proper coolant levels and check level monthly (Note: Never attempt to remove a radiator cap while the engine is hot. Serious injury could result).
    • Replace coolant with a mixture of antifreeze and water according to the vehicle manufacturer's recommendations.
    • Inspect engine belts for cracks or missing sections; check belt tension.
    • Evaluate radiator and radiator cap for leaks, corrosion, or a worn cap gasket.
    • Examine hoses every 12 months. Look for leaks, cracks or rot. Replace when showing signs of wear.
    • Tighten any loose clamps. Always replace clamps when replacing hoses.
    • Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating.
    • Periodically, remove bugs, leaves and other debris from the front of the radiator. They can block airflow and substantially reduce cooling efficiency.

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -

Shipping Information

  • Item Requires Shipping
  • 2.6 lbs.
  • W7.9000” x H3.2000” x L10.2000”

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