TSBs

Replacing exhaust camshaft on Chevy

March 5, 2024

This bulletin applies to 2016-2021 Chevy Spark vehicles equipped with a 1.4L LV7 engine.

Related To:

Inspect for damaged vacuum pump drive lugs (damaged example shown here).

Rotate the exhaust camshaft to position the 2D matric marking on the cam hex in the 12 o'clock position.

This bulletin applies to 2016-2021 Chevy Spark vehicles equipped with a 1.4L LV7 engine. You may experience a possible no-start/no crank or extended crank condition along with DTC P0014, P0017, P0365 and/or P0366.

Verify that the small tang on the exhaust cam reluctor ring is in line with the 2D matric mark.

Complete the latest diagnostics in service information for “Engine Cranks But Does Not Run.” If unable to determine the root cause using published SI diagnostics, proceed with the following:

Remove the cam cover assembly and perform the following steps to confirm exhaust camshaft reluctor orientation. During disassembly, the vacuum pump drive lugs should also be inspected for damage.

Overall view of showing small reluctor ring tang in line with the matrix mark.

Remove the exhaust camshaft to position the 2D matrix marking on the camshaft hex in the 12 o’clock position. With the matric marking at 12 o’clock, verify the small tang on the cam reluctor ring is in line with the 2D matrix mark. If you find that the vacuum pump drive lugs are broken and/or the exhaust cam reluctor ring is out of position, replace the exhaust camshaft and the vacuum pump.

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Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored.