Oldsmobile Cutlass Supreme oil leaking into radiator issue on Oldsmobile Cutlass Supreme

Submitted by solar seeker · Jun 23, 2025
Published by RepairPal

Problem overview

Some Oldsmobile Cutlass Supreme owners report experiencing oil leaking into the radiator, which can result in a dangerous mix of engine coolant and oil in the system. This issue is often attributed to oil system component failure or leaking engine gaskets. Symptoms may include steam or smoke emanating from the engine due to the burning of coolant and oil, as well as the presence of oil in the cooling system. Owners are advised not to ignore this serious problem, as it requires prompt attention to prevent further engine damage. To resolve the issue, it is essential to identify the source of the leak, potentially related to engine gaskets or other oil system components, and undertake appropriate repairs. It is recommended that affected owners have their vehicles inspected by a qualified mechanic for accurate diagnosis and necessary repairs.

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Oldsmobile Cutlass Supreme vehicles with this problem

Average mileage: 205,617 miles
(205,617 - 205,617)

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