This bulletin applies to 2020-2021 Buick Encore GX vehicles. Customers may comment that the passenger side heating performance is lower than the driver side.
Example of the location of the exhaust outlet pipe. Check for blockage using an endoscope.
This bulletin applies to 2020-2021 Buick Encore GX vehicles. Customers may comment that the passenger side heating performance is lower than the driver side.
GDS2 engine cooling and HVAC data show that the temperature difference between the heater inlet (ECT sensor 3) and the heater outlet (ECT sensor 4) is over 86 degrees Fahrenheit when the engine is fully warmed up.
The cause is internal blockage of the exhaust manifold outlet pipe. Technicians are required to see the temperature of ECT sensor 3 and ECT sensor 4. If the difference is over 86 degrees Fahrenheit, check to see if the pipe is internally blocked using a general endoscope. Replace the exhaust manifold outlet pipe if it is blocked. The replacement exhaust outlet pipe is P/N 12703636. The pipe gasket is P/N 12666899.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, 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.
