Speedway Aluminum Radiator Coolant Overflow Expansion Tank 8AN
Speedway Aluminum Radiator Coolant Overflow Expansion Tank 8AN
Speedway 13 Inch Stainless Steel Coolant Expansion Overflow Tank
Speedway Polished Radiator Coolant Overflow Expansion Tank, 3 x 10 In.
Speedway 15 Inch Stainless Steel Coolant Expansion Overflow Tank
Speedway Polished Radiator Coolant Overflow Expansion Tank, 3 x 16 In.
Speedway Polished Radiator Coolant Overflow Expansion Tank, 2 x 17 In.
Aluminum Universal 13 Inch Finned Radiator Overflow Tank
Fabricated Aluminum Hidden Expansion Overflow Tank, 66-72 GM Cars
Speedway Polished Radiator Coolant Overflow Expansion Tank, 2 x 19 In.
AFCO 80158 Coolant Recovery Tank
AFCO Stainless Coolant Recovery Tank
DeWitts® 403 Corvette Surge Tank, 1968-72 Corvette
DeWitts® 401 Corvette Surge Tank, 1963-64 Corvette C2
DeWitts® 421 Corvette Surge Tank, 1963-67 Corvette C2
AFCO 80158B Aluminum Radiator Overflow Recovery Tank, Black
DeWitts® 422 Corvette Surge Tank, 1968-72 Corvette C3
Mr Gasket 9135 Radiator Fluid Reservoir, Aluminum, 24 Ounce
Spike Chassis 005-2062 Aluminum Expansion Tank
JOES 45010 Expansion Tank, Sheet Metal Mount
AFCO Radiator Combo Pack
DeWitts® 400 Corvette Surge Tank, 1961-62 Corvette
OTB Gear 6850 Finned Cast Radiator Overflow Tank,13-3/4 In, Custom Cap
OTB Gear 6853 Radiator Overflow Tank, Finned Cap, 14 Inch, Polished
DeWitts® 420 Corvette Surge Tank, 1961-62 Corvette C1
DeWitts® 419 Corvette Surge Tank, 1969-72 Corvette
OER 14070997 1982-88 Camaro Radiator Overflow Jar
OER 463153 Radiator Overflow Bottle, 1973-77 Camaro
OTB Gear 6856 Radiator Overflow Tank, Finned Cap, 16 Inch, Polished
Spectre 4192 Radiator Overflow Tank, 3 x 10 Inch
Spectre 4194 Radiator Overflow Tank, 3 x 16 Inch
Scott Drake C5ZZ-8C077-AL 65-68 Ford Radiator Overflow Tank, Alum
Mr Gasket 9133 Overflow Tank, Universal, Polished Stainless Steel
OER 10170175 1989-92 Camaro Radiator Overflow Jar
OER 357402 1974-80 Chevy/GMC Truck Radiator Overflow Jar
Spectre 4179 Radiator Overflow Tank, Pol Stainless Steel, 2x13 In
OTB Gear 6852 Radiator Overflow Tank, Sprocket Cap, 14 Inch, Polished
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Water, and engine coolant for that matter, expands when heated. The volume of the water or coolant increases the pressure of a cars radiator system. That coolant has to expand somewhere - ideally, not onto the ground, creating a slick unpredictable surface. We’ve all witnessed the results of a too-hot radiator and it’s after effects. The engine overheats, and in turn, coolant expands in the radiator, spilling over into the radiator overflow tank, but then it leaks out the overflow bottle too because it has expanded too much from overheating.
The good news is that this is all normal stuff unless of course, the engine gets too hot and operates above it’s normal operating range. When engine temperatures stay in their normal operating range, all is well, and the coolant stays within the system and it also stays within the confines of the radiator overflow tank.
If you are in the process of modifying , designing or replacing your car’s cooling system, an often overlooked item that will be needed is a quality radiator overflow tank. A radiator overflow tank, or radiator catch can, as they are sometimes called are mandatory on most race tracks. To be a little more clear, many race cars use what’s called an expansion tank and it’s not quite the same as a radiator overflow tank. It’s kind of inconvenient to have cars puking hot coolant all over the track. Interestingly, this is how the term “puke can” came into being.
A typical radiator overflow bottle is comprised of a tank of varying size with two nipples and one hose connection at the bottom that connects to the radiator via a hose. This hose connects to the coolant recovery port on the radiator, which is positioned just below the radiator cap, but above the cap’s pressure plunger. When the coolant heats up and expands to the point that it’s volume exceeds the size of the radiator, the excess goes out the port to the radiator overflow bottle. When the coolant cools back down, either running or sitting, the decreased volume creates lower pressure in the radiator and It draws the excess coolant back into the radiator. Inside the radiator overflow tank is another port that sits high above the normal bottle level. In the event that the bottle becomes overfull, the rising coolant tops the higher port and runs out on the ground.
If your radiator sits lower than the engine (like many factory older corvettes, etc), then you are going to need a coolant surge tank, or expansion tank. These fully pressurized tanks can be easily identified because they will have a pressure cap neck built onto them. You have to mount these higher than the engine in the system, and you will fill your cooling system from this reservoir. You can actually add an additional catch can onto a coolant surge tank, because many have an overflow nipple built in below the cap.
If your radiator sits higher than the engine and it already has a fill neck on it, all you really need is an unpressurized universal coolant reservoir or universal coolant overflow tank.
For a universal coolant reservoir or coolant surge tank, the general rule of thumb for proper capacity of expansion is 12% of total coolant volume for draw down and 6% of the total volume for thermal expansion. It’s always best to err on the large size when it comes to capacity. What you do not want happening is coolant running on the ground all the time, or the radiator sucking air back into the cooling system.
Speedway Motors carries a large variety of universal coolant reservoirs and universal coolant overflow tanks. If you need a pressurized tank with a cap, we have multiple choices from our own quality in house brands to great brand names like AFCO, Dewitts and Spike Chassis to name a few. We also carry beautiful, show-quality radiator overflow bottles made from polished stainless steel or polished aluminum.
Stop coolant loss and prevent air pulling into your cooling system with radiator expansion tanks from Speedway Motors. Radiator surge tanks are great for any radiator and application with easy-to-mount tabs and quality material construction. Available in your choice size, radiator overflow tanks look and perform great on street rods, race cars, restorations, and everything in between. Trust the best in radiator surge tanks from Speedway Motors, in stock and ready to ship today!