Technical Service Bulletins

Hot LT Engine

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Hot LT Engine

This bulletin applies to 2016-2019 Cadillac CTS-V and 2015-2019 Escalade vehicles equipped with a 6.2L LT4 or L86 engine. A vehicle may have a concern of the engine running hot and/or has a tick noise from the thermostat.

Inspect the position of the cylinder head gasket locating tabs to determine if the gasket(s) have been possibly installed backwards. The gasket tabs on both banks should be closer to the front of the engine, near cylinders 3 and 4.

If the tabs are closer to cylinders 5 or 6, the head gaskets were installed incorrectly, restricting coolant flow. The head(s) must be removed, cleaned and reinstalled with new gaskets, properly positioned.

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