One Stop Solutions 1035 Radiator

Radiator for Buick, Oldsmobile, and Pontiac

Restore cooling performance with this OSC Premium New Automotive Radiator, part number 1035. Built for OES form and function, it is engineered for direct replacement use in select Buick LeSabre, Buick Park Avenue, Oldsmobile 88, Oldsmobile 98, and Pontiac Bonneville applications with engine oil cooler and transmission oil cooler provisions.

Key Features

• Premium-grade aluminum core construction with plastic tanks
• Crossflow design with a 30 1/2 in. core height, 17 1/4 in. core width, and 1-1/4 in. core thickness
• Transmission oil cooler included; plated engine oil cooler included
• Die-cut gasket design for a tighter seal
• Individually pressure tested during production
• Multi-fit engineering for proper appearance and fit
• Factory-style fittings and hardware are included where required by the unit design

Detailed Description

OSC part number 1035 is a replacement radiator engineered to match original equipment form and function for late-model GM full-size sedans. The radiator uses a crossflow layout with a single-row core, plated cooler sections, and cadmium-plated tubes inside and out to help resist premature failure. Core dimensions measure 30 1/2 inches high by 17 1/4 inches wide, with 1-1/4 inch thickness, 1 5/16 inch inlet diameter, and 1 9/16 inch outlet diameter. This design supports consistent coolant flow and heat transfer in vehicles that use both engine oil cooling and transmission oil cooling.

Fits 1994-1996 Buick LeSabre, N/A; w/EOC; w/LCI. Fits 1991-1996 Buick Park Avenue, N/A; w/EOC; w/LCI. Fits 1993-1996 Pontiac Bonneville, N/A; w/EOC; w/LCI. Fits 1992-1993 Oldsmobile 88, N/A; 30 1/2" CORE; w/EOC; w/LCI. Fits 1992-1993 Oldsmobile 98, N/A; 30 1/2" CORE; w/EOC; w/LCI. Fits 1989-1991 Pontiac Bonneville, N/A; 30 1/2" CORE; w/EOC; w/LCI.

This part cross-references Spectra Premium CU1035 for the same application.

What It Helps Address

• Overheating caused by a restricted or aging radiator core
• Coolant leaks from worn tanks, seals, or header connections
• Reduced cooling efficiency in high-mileage Buick, Oldsmobile, and Pontiac sedans
• Transmission heat buildup in vehicles equipped with an integrated cooler
• Engine oil temperature management where an oil cooler is part of the original setup

Installation Notes and Tips

Verify the core dimensions, inlet and outlet sizes, and cooler configuration before installation. This radiator is built for vehicles with engine oil cooler and transmission oil cooler equipment, so match the original layout on the vehicle before removal. Inspect hoses, clamps, and mounting points during replacement to help ensure a proper seal and stable fit.

Quality Assurance

OSC tests the radiator core before assembly, then tests the completed unit again after assembly. The transmission and engine oil coolers are also tested prior to installation into the tank. These production checks support consistent fitment and leak resistance for part number 1035.