Bulletin No.: PIP5197G
Published date: 03/13/2018

Preliminary Information
PIP5197G Possible Oil Consumption - Oil Leaks - Blue Smoke From The Exhaust - MIL On
Models
Brand:

Model:

VIN:

Model Years:

from

Engine:

to

Transmissions:

Buick

Encore

2013 - 2018

All

All

LUJ and LUV

All

Chevrolet

Cruze

2011 - 2016

All

All

LUJ and LUV

All

Chevrolet

Sonic

2012 - 2018

All

All

LUJ and LUV

All

Chevrolet

Trax

2013 - 2018

All

All

LUJ and LUV

All

Supersession Statement
This PI was superseded to remove administration details. Please discard PIP5197E.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition / Concern
You may encounter a customer concern of excessive oil consumption, blue smoke from the exhaust, MIL or fuel trim codes.
Excessive oil consumption, not due to leaks, is the use of 0.9 L (1 qt) or greater of engine oil within 3 200 kilometers (2,000 miles).
Any or all of the following DTCs may be current or set in history: P0171 P0300 or P0299.

Recommendations / Instructions
Refer to the latest version of PI0552 to check the engine oil dipstick and oil fill cap for proper sealing.
Refer to the latest version of PIP4925 to check for any air leaks to the intake system.
Check the PCV orifice for leaking oil or drawing vacuum at idle thru its external port. (The PCV orifice is an integral part of the camshaft
cover). (See picture below).
Please note that a weak or broken piston ring land can cause a P0300.
It may also damage the PCV orifice diaphragm causing a P0171.

If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly.
Clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.
Check for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. (See pictures below for
inspection procedure).

If the non return valve is not visible as shown in picture, then 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.
If the valve is present reinstall the intake manifold. Do not replace.
Properly seated Non Return Valve as viewed with the intake manifold removed.

If the intake manifold Non Return Valve is missing, then replace the intake manifold assembly,
Clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.
If the intake manifold Non Return Valve is seated properly, then perform the following.
Record the crankcase pressure. (Normal crankcase pressure readings are between -11 & -18 inches of water in park at hot idle) / (ESST
gage works best, see pictures below for connection of ESST at the engine oil dipstick hole in the camshaft cover.
Record the crankcase pressure at hot idle in park as well as under snap throttle.
Note: The connection must be made with the engine off. The engine is then started and the pressure readings are recorded.

If the crankcase pressure is between -11 and -18 inches of H2O during the hot idle in park and during snap throttle testing, then clean
oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.
If the crankcase pressure is between -10 and 0 inches of water then a cylinder leakage / crankcase pressure concern exists.
This is likely caused by a weak or broken piston ring land.
Replace all four piston assemblies and retest for proper crankcase pressures.
Clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.

Warranty Information
The correction for this concern may be one of several repairs described above. For vehicles repaired under warranty, please use the
appropriate warranty labor operation based on the original cause in addition to well documented straight time.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved
without completing every step, the remaining steps do not need to be performed.

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