Solution K22396588
Friday, October 4, 2019 5:12:57 PM CEST

** SOLUTION **
Title

Volvo Chassis - Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All
Emissions Prior To US17+OBD16 (Common Rail Fuel System), Model Year 2017 And
Older

Volvo Models
Volvo Model

VNL , VNM , VNR , VNX , VAH , VHD , VT

Emission Standard
Emission Standard

US04 , US07 , US10 , US10+OBD13 , US14 , US14+OBD15 , US14+OBD16 , US1
7 , US17+OBD16 , US17+OBD18

Engine family
Engine family

D12 , 11L Engine , 13L Engine , 16L Engine

** SOLUTION **
Cause

In cases where engine oil is found to be diluted with fuel, it is necessary to confirm that
the contaminant is fuel, and is the only contaminant present. An oil analysis will confirm
the contaminants and in turn determine the route of remaining diagnosis and repair.

Solution
For any vehicle with symptoms of oil contamination or dilution, including oil level
above full (overfilled, making oil), low oil pressure codes, odors, etc.:

A. Oil analysis should be requested before proceeding with any repair. There
are two types of analysis:
- GC (Gas Chromatograph) ASTM D3524 is the recommended method.
- FTIR (Fourier Transform Infrared Spectroscopy) is not an accurate method for
fuel dilution measurements.

B. The following information should be included on the analysis sheet and
considered as possible contributing factors when reviewing the report:
- Mileage
- Engine hours
- Mileage/hours since last oil service
- Oil manufacturer
- Oil product name/code
- Oil viscosity (weight)
- Oil grade

C. If the above data indicates a high percentage of fuel dilution and the oil
life does not exceed recommended service intervals, perform the following
dye test:
1. Put dye in the fuel filter on the engine.
2. Pressurize/prime the system with the hand pump
3. Remove the valve cover
4. Ensure there is shielding in place to prevent oil sling from the geartrain.
5. Run the engine for no longer than 10-15 seconds.
4. Inspect the following areas with a black light during and after operation:

- Injector plunger, solenoid, and side body
- Fuel gallery plugs at the front and back of the cylinder head
NOTE: A small amount of fuel observed around the injector plungers is normal.

D. Repair as needed.

E. Resecure the valve cover and run the truck for a short period of time.
Check to see if oil level has increased.

NA_Sister solutions

K30024143

Solution visibility

Dealer distribution

Function(s)/component(s) affected
Function affected

Engine , fuel system , engine lubrication

Function Group
Function Group

22 lubricating and oil system , 23 fuel system, excluding gas propulsion

Customer effect
Main customer effect

fluid , diagnostics/methodology , efficiency/abnormal behavior

Fluid problem

dilution , consumption , contamination , level incorrect

Fluid implicated

Oil , Fuel

Fluid pressure

low pressure

Conditions
Vehicle operating mode
Frequency of occurrence of
problem

when driving , when stationary
random

Administration
Author

ut01254

Last modified by

A241298

Creation date

15-05-2013 15:05

Date of last update

27-09-2019 21:09

Status

Published

Average score

0

Number of scores

1

UNCONTROLLED COPY. Printed document is for temporary use only and should not be retained.