Potential Oil Leak from Camshaft Carrier Gasket

A potential oil leak from the camshaft carrier gasket may be found on some 2019 CT6; 2019-2021 XT4; 2020-2021 Acadia, Blazer, CT4, CT5, XT5 and XT6 models equipped with the 2.0L 4-cylinder engine (RPO LSY). On these engines, there may be an improper amount of sealer applied to the recommended areas of the camshaft carrier gasket T-joint area.

Look for an engine oil leak from the front of the engine. Refer to the appropriate Service Information for additional information on oil leak diagnosis.

If an oil leak is suspected, remove all residual oil from the front of the engine, add oil dye and allow the engine to run until a leak is observed. (Fig. 20)


Fig. 20


Use a black light to highlight the oil dye. (Fig. 21) Once a leak is confirmed, inspect the front of the engine camshaft carrier T-joint area.


Fig. 21


If the oil leak is isolated to the camshaft carrier T-joint area, reseal the camshaft carrier assembly.

Apply a 5 mm (0.2 in.) bead of RTV at the top and bottom of the new camshaft cover gasket to fill the T-joint. (Fig 22)


Fig. 22


– Thanks to Robert Halas

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