Continental 52420 Radiator Coolant Hose

Flexible radiator coolant hose

Continental Flexible 52420 is a radiator coolant hose for applications where a molded hose is not available. It uses a corrugated cover and wire insert to follow the original hose path while maintaining full flow and resisting collapse under vacuum. This hose is built for broad fitment across classic and late-model trucks, vans, and passenger vehicles, including Chevrolet Blazer, Ford Mustang, and GMC Sonoma applications.

Key features

• Flexible replacement hose for coolant routing where a molded shape is not offered.
• Corrugated outer cover helps the hose bend and route through tight spaces.
• Wire insert helps maintain shape and resist vacuum collapse.
• Made from black Versigard EPDM for coolant-system durability.
• Built to SAE J20R5 D1 requirements.
• Fits a wide range of upper and lower radiator hose applications, plus one engine-to-oil-cooler application.

Detailed description

Continental part number 52420 is a flexible radiator coolant hose engineered for direct replacement use when the original equipment hose is not available in a molded form. The corrugated construction and internal wire support allow the hose to bend into the required shape while preserving coolant flow. Material specification is black Versigard EPDM, and the hose dimensions include a 1.500-inch inside diameter at one end, a 1.750-inch inside diameter at the other end, and a 19.500-inch length. This part cross-references Dayco 81261 and Gates 25530 for the same application. It is a practical choice for Chevrolet and GMC cooling-system service, as well as Ford Mustang and Jeep Wrangler fitments listed below.

What it is used for

• Replacing a deteriorated coolant hose that has softened, cracked, or split.
• Restoring coolant flow when the original molded hose is no longer available.
• Addressing hose collapse caused by vacuum conditions in the cooling circuit.
• Servicing mixed-fit cooling layouts that require a flexible hose route.
• Supporting repairs on Chevrolet Blazer, GMC Sonoma, and Ford Mustang cooling systems.

Installation notes and tips

Verify hose routing, end diameters, and application notes before installation. This hose is listed for upper, lower, connector-to-pipe, and engine-to-oil-cooler positions depending on the vehicle. Match the flexible hose length and diameter to the original routing, and confirm whether the application is marked with or without air conditioning or California emissions. For fitment examples, it fits 2001-2005 Pontiac Aztek, lower; fits 1991-2004 GMC Sonoma, lower; and fits 1987-1995 Jeep Wrangler, lower.

Quality assurance

Continental supplies this hose to SAE J20R5 D1 specification, reflecting a cooling-system hose built to recognized performance requirements. The Flexible product line focuses on applications where a molded hose is not available, using a corrugated design and wire reinforcement to replicate the original hose path.