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OER Radiator Overflow Tanks

OER radiator overflow tanks keep engine coolant safely in a reservoir—and not on the driveway. These durable plastic recovery tanks are available in a variety of shapes and sizes for fitment in specific vehicles. They're built to meet or exceed OE specifications, and include the correct hot/cold fill lines. Order the replacement model tailored for your radiator application.

4.48 out of 5 stars ( 75 )

$36.79

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$55.99

OER GM Radiator Overflow Jar Caps

Replace that broken, warped, or missing cap on your ride to keep your overflow bottle from leaking coolant with a new one from OER. These radiator overflow jar caps are designed to fit on various GM applications and feature "Engine Coolant Only" stamped right onto them. When you need quality replacements that are as good as the originals or better, equip your ride with the best--OER!

3.96 out of 5 stars ( 28 )

$9.99

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$10.99

Dorman Coolant Reservoir Caps

Dorman coolant reservoir caps are designed to fit over your factory coolant reservoir. They're easily identified by the coolant logo on the top and simply thread on in the stock location. The caps are built from high-grade plastic to withstand high coolant and underhood temperatures.

4.53 out of 5 stars ( 15 )

$3.99

Goodmark Coolant Reservoir Caps

Goodmark offers engine coolant reservoir caps for fitment on most GM cars and pickup trucks between 1973-92. These aluminum replacements include attachment points for your radiator hose—and include the words "Engine Coolant Only" stamped on the surface so you won't mix fluids by mistake.

Not Yet Reviewed

$11.99

The Stop Shop Radiator Coolant Overflow Bottle Caps

The Stop Shop offers radiator coolant overflow bottle caps with the correct design as the originals found on late model vehicles, including the 1974-1975 and 1980 Camaros and other late model vehicles. Benefits of these radiator coolant overflow bottles caps are primarily related to their role in the proper functioning of your vehicle's cooling system, as the cap provides a seal to the radiator and coolant system, preventing leaks and maintaining the integrity of the closed system. These caps are designed to help regulate pressure, prevent boiling and air from entering, and allow for proper coolant recirculation, all of which are vital for a healthy engine and efficient cooling.

Not Yet Reviewed

$14.99