20NA047
Service Bulletin Details
Public Details for: 20NA047
This service bulletin provides a service procedure to correct conditions of front or rear crankshaft oil leak, mil illuminated with dtc P1101 set.
- 2020 - 2019 - 2018 - 2017 - 2016 -
Models from 2019
2019 BUICK ENCORE |
2019 CHEVROLET CRUZE |
2019 CHEVROLET EQUINOX |
2019 CHEVROLET MALIBU |
2019 CHEVROLET TRAX |
2019 CHEVROLET VOLT |
2019 GMC TERRAIN |
Models from 2018
2018 BUICK ENCORE |
2018 CHEVROLET CRUZE |
2018 CHEVROLET EQUINOX |
2018 CHEVROLET MALIBU |
2018 CHEVROLET VOLT |
2018 GMC TERRAIN |
Bulletin No.: Service Bulletin Date: 20-NA-047 March, 2021 TECHNICAL Subject: Front or Rear Crankshaft Oil Leak, Malfunction Indicator Lamp (MIL) Illuminated - DTC P1101 Set This bulletin replaces PIP5417C. Please discard all versions of PIP5417. Brand: Model: Buick Chevrolet GMC Model Year: VIN: from to Encore 2016 2019 1.4L (RPO LE2) Cruze (Gen II VIN B) 2016 2019 1.4L (RPO LE2) Equinox 2018 2020 1.5L (RPO LYX) Malibu 2016 2020 Trax 2019 2019 1.4L (RPO LE2) Volt 2016 2019 1.5L (RPO L3A) Terrain 2018 2020 1.5L (RPO LYX) — to Engine: from — 1.5L (RPO LFV) Transmission: — Involved Region or Country North America, China, Thailand, Middle East, Israel, Europe, Brazil, Chile, Colombia, Peru, South Africa Condition Some customers may comment on one or more of the following conditions: • Oil Leak • MIL illuminated Some technicians may find DTC P1101 (Intake Air Flow System Performance) set in the Engine Control Module (ECM). Cause This condition may be caused by higher than normal crankcase pressures, due to a plugged positive crankcase ventilation (PCV) orifice. Correction While performing Strategy Based Diagnostics for P1101 or engine oil leaks on the listed engines, testing for excessively positive crankcase pressures is necessary for root cause isolation. Copyright 2021 General Motors LLC. All Rights Reserved. Page 2 March, 2021 Crankcase Pressure Test Use the Evaporative Emissions System Tester (EEST) to record the crankcase pressure. Refer to the pictures below for connection of the EEST at the engine oil dipstick port and related readings. Bulletin No.: 20-NA-047 EEST Gage at 0 reading Note: The connection must be made with the engine off. The engine is then started and the pressure reading is recorded. 4573243 3416804 EEST hose adaptor 4573240 Normal crankcase pressure readings for the L3A, LE2, LFV and LYX are between -1 & -5 inches of water in park at hot idle. • If the crankcase pressure is in the proper range, follow Strategy Based Diagnostics for engine oil leaks and/or P1101 per SI. • If the crankcase pressure is excessively positive, above 0 inches of water (0 inches of HG / vacuum), then a positive crankcase pressure concern exists requiring further diagnostics. Inspect for any air induction restrictions in the front air intake duct to air cleaner housing or in the air cleaner housing (nesting materials, water intrusion or ice blockage, kinked PCV tube or modifications to the air induction system). Note: Refer to Service Bulletin #18-NA-171 or 19-NA-122 for conditions caused by cracked pistons. These are usually accompanied with a P0300 and they can cause higher crankcase pressures. Bulletin No.: 20-NA-047 March, 2021 Page 3 Camshaft Cover Inspection, Cleaning and Orifice Replacement Remove the camshaft cover and remove the PCV orifice and inspect for blockage. Replace the orifice as necessary along with the camshaft cover gaskets. Make sure the camshaft cover does not have any blockages in the PCV passages. 5519694 5513764 If diagnosing for oil leaks and/or DTC P1101 with no engine oil leaks and excessive positive crankcase pressure exists, an obstructed PCV orifice (1) would be suspect requiring a PCV orifice replacement. 1. Remove the camshaft cover (1). Refer to Camshaft Cover Replacement in SI. 2. Remove the PCV orifice (2) and inspect for blockage. 3. Verify the camshaft cover does not have any blockages in the PCV passages. 4. Replace the orifice as necessary along with the camshaft cover gaskets. 5. Install the camshaft cover. Parts Information Causal Part Vehicle Description Part Number Qty X All ORIFICE, PCV VLV 12641875 1 12636176 2 (Encore/Cruze/Malibu/ Trax/Volt) N/A All GASKET, CM/SHF POSN ACTR SOL VLV 1 (Equinox/Terrain) N/A All GASKET, CM/SHF CVR (OUTER) 12636177 N/A All GASKET, CM/SHF CVR (INNER) 12636384 N/A All BOLT, F/INJR 55570735 N/A Encore/Cruze/Malibu/ Trax/Equinox/Terrain GASKET, VAC PUMP 12665421 N/A Encore/Cruze/Malibu/ Trax/Equinox/Terrain SEAL, VAC PUMP 12668429 N/A Equinox/Terrain GASKET, CM/SHF POSN ACTR SOL VLV 12676587 1 1 8 1 1 1 Page 4 March, 2021 Causal Part Vehicle N/A Encore/Cruze/Trax N/A Equinox/Terrain N/A Malibu N/A Volt Description Part Number PIPE, FUEL FEED INTER 12684046 SEAL, F/INJN FUEL RL 12659782 PIPE, FUEL FEED INTER 12707219 SEAL, F/INJN FUEL RL 12659782 PIPE, FUEL FEED INTER 12684046 SEAL KIT, F/INJR (O RING) 12673056 PIPE, FUEL FEED INTER 12684047 SEAL, F/INJN FUEL RL 12665137 Warranty Information For vehicles repaired under the Base Emission Warranty coverage (Code E), use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. Labor Operation 4087348* Add Add Add Vehicle Description All Crankcase Pressure Test Encore Camshaft Cover Inspection, Cleaning and Orifice Replacement Cruze Camshaft Cover Inspection, Cleaning and Orifice Replacement Equinox Camshaft Cover Inspection, Cleaning and Orifice Replacement Bulletin No.: 20-NA-047 Labor Time Labor Operation Add Add 3.8 hrs Add Add 1 1 1 1 1 4 1 1 Labor Time Vehicle Description Malibu Camshaft Cover Inspection, Cleaning and Orifice Replacement 4.7 hrs Trax Camshaft Cover Inspection, Cleaning and Orifice Replacement 2.0 hrs Volt Camshaft Cover Inspection, Cleaning and Orifice Replacement 3.5 hrs Terrain Camshaft Cover Inspection, Cleaning and Orifice Replacement 3.3 hrs 0.3 hr 2.0 hrs Qty *This is a unique Labor Operation for bulletin use only. 3.3 hrs Version 5 Modified Released February 28, 2020 March 12, 2020 – Updated the quantity for part number 12636176 and the Warranty Information section to add new labor times. April 17, 2020 – Removed Korea from Involved Region or Country section and changed Crankshaft Pressure Test to Crankcase Pressure Test. July 23, 2020 – Updated the Parts Information section. March 08, 2021 – Added Fuel Injector Bolt P/N 55570735 to the Parts Information. GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION