My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Gates 31309 Radiator Cap

Part of: Gates Radiator Cap

Other options in this family: Gates 31525 Gates 31569 Gates 31523 Gates 31526 Gates 31534

Manufacturer

Picture for manufacturer Gates

Part Number

31309
11 reviews
Sale Price

$7.16

4 left at this price

delivery box

Usually delivered within 2 days

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Gates 31309 Radiator Cap is a precision-engineered cooling system component designed to maintain optimal pressure in your vehicle's radiator. This cap plays a critical role in raising the boiling point of coolant, preventing overheating and ensuring efficient engine temperature regulation.

Key Features:

  • Maintains proper cooling system pressure for optimal performance
  • Precision-calibrated pressure relief valve prevents system damage
  • Durable construction resists corrosion and wear from constant temperature cycling
  • Direct replacement for OEM radiator caps
  • Quality-tested to meet Gates' strict manufacturing standards

Gates radiator caps are engineered to exacting specifications to ensure a proper seal and correct pressure rating. The cap's pressure valve opens at a predetermined pressure to allow excess coolant to flow into the overflow reservoir, then reseals to draw coolant back as the system cools. This critical function protects hoses, gaskets, and other cooling system components from excessive pressure while maintaining the higher operating temperatures that modern engines require for optimal efficiency.

Products specifications

Type

Heavy-Duty B Size Filler Neck Cap

Cap Depth (in)

1.14

Coolant Recovery System

Open System

Filler Neck Depth (in)

.75

Filler Neck Inside Diameter (in)

2.13

Filler Neck Outside Diameter (in)

2.69

Shell Diameter (in)

2.81

Quick and easy

Easy

smooth

It is the way all on-line purchases should go. I got the item in 2 days, even before the email that it had shipped! Only negative is that the shipping cost was 35% the item cost. But it was still less that others with "free" shipping.

Quick, easy. I like the great price & free shipping. Only problem is, the item is a black, diamond-plate METAL trailer box. It was packed simply in cardboard, no protective package around it either inside the box or around the item. That's it, ite

this was super easy and a great price!!!

best price available plus like the ability to pay with amazon

Good

Need it quick as possible please need it for my license. Thanks y'all are the cheapest auto part store around.

Quick and easy. I just hope it works for my application:)

Has the cheapest prices around. Very easy to checkout and quick shipping. Everything a customer could ask for.

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy