TSBs

Listening to Buick water pump

Nov. 12, 2024

This bulletin applies to 2017-2019 Buick LaCrosse and 2018-2020 Regal vehicles equipped with a 3.6L engine. The MIL may be on accompanied by engine noise and a belt squeak.

Motor Age Staff

Related To: Mitchell 1

If the condition is bad enough, the engine will pick up knock noise created by the water pump. Listen to the water pump using a stethoscope or chassis ears.

This bulletin applies to 2017-2019 Buick LaCrosse and 2018-2020 Regal vehicles equipped with a 3.6L engine. The MIL may be on accompanied by engine noise and a belt squeak.

You may find DTC P0324 (knock sensor system performance) set in the ECM. This condition may be caused by the water pump.

If the condition is bad enough, the engine will pick up knock noise created by the water pump. Listen to the water pump using a stethoscope or chassis ears. Watch the knock retard bank to bank on GDS2, then remove the belt and observe knock retard again. If there is a difference made by removing the belt, replace the water pump.

About the Author

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.