Part #: 31306

Gates 31306 Radiator Cap

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$16.89Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Cooling System Protection with Gates OE Type Radiator Cap

The Gates OE Type Radiator Cap 31306 is designed to maintain optimal pressure in your vehicle's cooling system. Engineered as a standard cap with precise dimensions and pressure ratings, it ensures consistent performance and helps prevent coolant loss in various makes and models.

  • Standard cap design with a 7 psi pressure rating
  • Filler neck inside diameter of 1.61 inches (41 mm) and outside diameter of 2.13 inches (54 mm)
  • Cap depth of 1.41 inches and filler neck depth of 1 inch (25 mm)
  • Compatible with open coolant recovery systems
  • Shell diameter measures 2.33 inches for secure fitment

About the Gates OE Type Radiator Cap Product Line

The OE Type Radiator Cap line from Gates focuses on delivering radiator caps that meet original equipment performance standards. This ensures that the 31306 radiator cap provides reliable pressure control and sealing comparable to factory-installed parts, supporting the integrity of your vehicle's cooling system.

Technical Details and Specifications

The Gates 31306 radiator cap features a standard cap type with a pressure rating of 7 psi, suitable for vehicles requiring a pressure range between 6 and 8 psi as per SAE standards. Its precise filler neck dimensions—1.61 inches inside diameter and 2.13 inches outside diameter—allow for a secure and proper fit on compatible radiator filler necks. The cap depth of 1.41 inches and shell diameter of 2.33 inches contribute to its compatibility with various vehicle cooling systems that utilize an open coolant recovery system.

Common Applications and Problem Solving

  • Prevents coolant leakage by maintaining proper system pressure
  • Helps avoid engine overheating due to coolant loss
  • Ensures consistent coolant flow in open recovery systems
  • Replaces worn or damaged radiator caps to restore cooling system efficiency
  • Supports pressure regulation to protect radiator and hoses from damage

Installation Notes and Tips

When installing the Gates OE Type Radiator Cap 31306, ensure the radiator filler neck matches the specified inside and outside diameters for a proper seal. Clean the filler neck area before installation to prevent contamination. Tighten the cap securely but avoid over-tightening to maintain the integrity of the pressure seal.

Quality Assurance and Warranty

Gates OE Type Radiator Caps are manufactured to meet original equipment specifications, providing dependable performance and durability. While specific warranty details are not provided, Gates products typically adhere to strict quality control standards to ensure reliability in automotive cooling systems.

BrandGates
Part Number31306
TypeStandard cap
Cap Depth1.41
Filler Neck Inside Diameter1.61
Filler Neck Inside Diameter41
Filler Neck Outside Diameter2.13
Filler Neck Outside Diameter54
Coolant Recovery SystemOpen system
Pressure Rating7
98221
982225
98332.33
Coolant Recovery SystemOpen system
Filler Neck Depth (in)1
Filler Neck Depth (mm)25
OE Comparison RatingOe performance
Pressure Rating (psi)7
SAE Pressure Range (psi)6-8
Shell Diameter (in)2.33
TypeStandard cap

This part fits 0 vehicles. Search below:

YearMakeModelPositionNotes

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

102061120612R31133-801125530031306330034600453-10629703-141177-505850797AT29054B2AZ 8100 EBC-6BR-6DR-6ER-6M-6P-6R-6RC-3RC-6RR-6RS-6T-6U95-4128WA-6WC-6WR-6

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.