News Technical Service Bulletins

How to Fix Chevy Coolant Leak

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Example of outer cylinder head bolt coolant leakage.

| Photo Credit: General Motors

This bulletin applies to 2016-2018 Chevy Camaro and Corvette vehicles equipped with the 6.2L LTi or LY4 engine. The engine may experience a mystery coolant loss.

If the coolant is low, pressure test the system looking for leaks at the outer cylinder head bolt locations.

If a leak at any head bolt locations is found, GM recommends replacing the cylinder head that shows the leak.

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