Gates Engine Coolant Reservoir Cap,Radiator Cap P/N:31527

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$8.99
MPN: 31527
Item Package Quantity: 1
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Gates Engine Coolant Reservoir Cap,Radiator Cap P/N:31527
Gates Engine Coolant Reservoir Cap,Radiator Cap P/N:31527
$8.99

Keep your cooling system sealed and correctly pressurized with the Gates Radiator Cap / Coolant Reservoir Cap 31527. A radiator pressure cap seals the filler neck and holds the coolant under pressure, which raises the boiling point; its valves relieve excess pressure and draw coolant back from the recovery tank as the engine cools. It fits a very wide range of applications — including the 1975-1996 Ford F-150, 1979-1985 Honda Accord, 1975-1987 Honda Civic, 1986-1989 Acura Integra, and 1986-1989 Alfa Romeo Spider — with one cap per application. See the Buyer's Guide tab for the full list.

  • Precise pressure control: engineered with application-specific vent and vacuum-relief valves.
  • Built to last: constructed from corrosion-resistant heavy-gauge metal or high-quality plastic, depending on the application.
  • OE-performance design: made to match OE fit, form, and function, and requires no adjustment for installation.
  • Key dimensions: shell outside diameter 2.33 in, cap depth 1.25 in, filler neck depth 0.75 in (19 mm), filler neck inside diameter 1.61 in (41 mm).

This is a standard cap that works whether or not the vehicle uses a coolant recovery system. If a worn or leaking cap is losing pressure or letting coolant escape, this replaces it. Country of origin: China.

Frequently Asked Questions

What does a radiator pressure cap do?

It seals the cooling system's filler neck and holds coolant under pressure to raise its boiling point. Its valves relieve excess pressure and let coolant return from the recovery tank as the engine cools.

Does this cap fit my vehicle?

It covers a wide range of makes and models, including the 1975-1996 Ford F-150, 1979-1985 Honda Accord, and 1986-1989 Acura Integra. Check the Buyer's Guide tab to confirm your exact year, make, model, and engine.

What is this cap made of?

Gates builds these caps from corrosion-resistant heavy-gauge metal or high-quality plastic, depending on the application, for long service life and accurate pressure control.

Does it require any adjustment to install?

No. It is designed to match OE fit, form, and function and requires no adjustment for installation.

How do I know my cap needs replacing?

Signs may include coolant loss, overheating, or a cap that no longer holds pressure or seals properly. Diagnose the cause first; if a failed cap is the issue, this replaces it.