# Service bulletin 16NA405

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10158783
- Published by NHTSA: 2019\-04\-22
- Manufacturer's number: 16NA405
- Manufacturer's date: 2019\-03\-26
- NHTSA component: POWER TRAIN; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\)

## NHTSA's summary

This technical bulletin provides a procedure to install a PCV heater or a charge air cooler to correct the turbo charger system from freezing causing cold weather performance issues.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158783-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10158783-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Exhaust and emissions, Transmission and driveline, Crankcase ventilation \(PCV\)

## Vehicles listed

- 2013 to 2019 BUICK ENCORE
- 2013 to 2019 CHEVROLET TRAX

## Other bulletins for the same vehicles and component

- [19NA080](/bulletins/10160421.md), 2019-05-28, Service bulletin: EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\). This informational bulletin provides information to the tech to discard the PCV drain tube when working on the lower area of the engine.
- [16NA405](/bulletins/10159590.md), 2019-05-13, Service bulletin: POWER TRAIN; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\). This technical bulletin provides a procedure to install a PCV heater and a front fascia blocker to correct the turbo charger system from freezing causing cold weather performance issues.
- [PIP5598](/bulletins/10147358.md), 2018-11-13, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\). This Preliminary information communicates the possibility of a crank no start or extended crank condition due to exhaust cam reluctor being out of position.
- [PIP5197F](/bulletins/10137724.md), 2018-05-21, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\). This Preliminary Information communication provides information to the technician on the steps to diagnose and repair vehicles that have excessive oil consumption, blue smoke from the exhaust, or a Malfunction Indicator Lamp. Technician should inspect the PVC orifice for leaking oil or drawing a vacuum at idle. If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly. Technician will inspect for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. Check for the return valve if it is not visible use a long cotton swab to wipe any excess oil from the valve to validate. If the non return valve is still not visible, then intake manifold removal for inspection is required to validate. When the valve is present reinstall the intake manifold. When the valve is not present replace the intake manifold assembly.

JSON: [/v1/bulletins/10158783](/v1/bulletins/10158783)

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