Spectra Premium CU573 radiator for the 1974-1976 Pontiac Firebird V8 7.5L, the 1974-1979 Firebird V8 5.7L, the 1976-1979 Firebird V8 6.6L, the 1977 Firebird V8 4.9L, the 1977-1981 Firebird V6 3.8L or V8 5.0L, the 1979-1981 Firebird V8 4.9L and the 1980-1981 Firebird V8 4.3L carries engine coolant through an aluminum core so heat can leave the engine. Its structure and design are built to take on the same durability and expectations as the OE.
- Single-row aluminum core, 27.5 in high by 17.25 in wide and 1.25 in thick
- Plastic tanks in a cross-flow layout, with the inlet at the top left and the outlet at the bottom right
- Built-in concentric transmission oil cooler with 1/2-20 UNF female fittings, 8.5 in apart
- Saddle mounting type
Quick facts
- Part: Spectra Premium CU573 radiator
- Fits: the 1974-1976 Pontiac Firebird V8 7.5L, the 1974-1979 Firebird V8 5.7L, the 1976-1979 Firebird V8 6.6L, the 1977 Firebird V8 4.9L, the 1977-1981 Firebird V6 3.8L or V8 5.0L, the 1979-1981 Firebird V8 4.9L and the 1980-1981 Firebird V8 4.3L
- Material: Aluminum core, plastic tanks
A worn radiator can show up as coolant residue at the tank seams, a coolant level that keeps dropping or an engine that runs hot. Before replacing it, look over the hoses, cap and core for wet spots or bent fins with the engine off and cool, and check the coolant level only when the engine is cool.
Fits
This radiator fits each year and engine run named in the opening sentence, and every one of those cars takes a single radiator.
Specifications
Fit and size
- Core: 27.5 in high, 17.25 in wide, 1.25 in thick
- Core rows: 1
- Inlet: top left, 1.3125 in diameter
- Outlet: bottom right, 1.5625 in diameter
- Inlet and outlet header: 18.6875 in long, 2.4375 in wide
- Transmission oil cooler fittings: 1/2-20 UNF female, 8.5 in apart
- Quantity per vehicle: 1
Build and materials
- Core material: aluminum
- Tank material: plastic
- Flow type: cross flow
- Mounting type: saddle
- Transmission oil cooler: built in, concentric
- Country of origin: China
In the box
One radiator with its built-in transmission oil cooler. A frame and an engine oil cooler are not included.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Is CU573 a 1979 Firebird radiator for the V8 5.7L?
Yes. Spectra Premium CU573 fits the 1974-1979 Firebird V8 5.7L, which covers 1979 with that engine.
Does the Spectra Premium CU573 radiator include the transmission oil cooler?
Yes, Spectra Premium CU573 has a built-in concentric transmission oil cooler with 1/2-20 UNF female fittings; a frame and an engine oil cooler are not included.
What size is the core on this radiator?
The core is 27.5 in high, 17.25 in wide and 1.25 in thick, with a single row of aluminum core and plastic tanks.
What can I look for to tell a radiator is leaking or clogged?
With the engine off and cool, look for wet or crusty residue at the tank seams, bent fins or a coolant level that keeps dropping. A shop can pressure-test the radiator.
Is the CU573 a cross-flow radiator, and where are the connections?
Yes. Spectra Premium CU573 is a cross-flow radiator with the inlet at the top left, the outlet at the bottom right and a saddle mounting type.
