How to Fix Chevy Coolant Leak

This bulletin applies to 2016-2018 Chevy Camaro and Corvette vehicles equipped with the 6.2L LTi or LY4 engine, which 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.

Information courtesy of Mitchell 1

Mike Mavrigian

Aug. 9, 2022

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.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.