Engine - Whining Noise From Engine Area
Classification: EM13-002Reference: ITB13-009
Date: March 25, 2013
2011-2013 QX56; WHINE NOISE FROM ENGINE AREA
APPLIED VEHICLE: 2011-2013 QX56 (Z62)
IF YOU CONFIRM:
A whine type noise is coming from the Bank 2 (B2) side of the timing chain system.
^ The noise is best heard from the high pressure fuel pump area.
^ The noise should increase in frequency with engine speed (RPM).
^ If the noise does not increase with engine speed, the timing chain system may not be the cause.
Refer to the appropriate section of the Electronic Service Manual (ESM) for further diagnosis.
ACTION:
Replace the B2 oil jet and both timing chains listed in the PARTS INFORMATION section of this bulletin.
^ Always replace all seals, o-rings and gaskets.
^ Replace timing chain related components as necessary.
^ For repair procedure, refer to the SERVICE PROCEDURE section of this bulletin.
^ Use Oil Jet Remover/Installer Kit J-51269 for oil jet removal, inspection, and installation.
NOTE:
Essential Service Tool Oil Jet Remover/Installer Kit J-51269 will ship to all Infiniti dealerships before the end of April 2013. If an Oil Jet Remover/Installer Kit is required prior to receiving the Essential Service Tool, contact TECH-MATE for short-term loaner tool information.
Oil Jet Remover/Installer Kit J-51269 contains:
> J-51269-1 Remover
> J-51269-2 Installer
> Gauge Pin - GO/NO-GO
IMPORTANT:
The purpose of ACTION above is to give you a quick idea of the work you will be performing. You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair.
PARTS INFORMATION
CLAIMS INFORMATION
Oil jet remover and installer; dealer tools may differ slightly
SERVICE PROCEDURE
Remove Oil Jet
NOTE:
For easier viewing, repairs are shown on a removed engine. There is no need to remove the engine from the vehicle to perform this repair.
1. Write down all radio station presets.
2. Disconnect both battery cables, negative cable first.
3. Remove both B1 and B2 timing chains.
^ Refer to the B ENGINE > EM Engine Mechanical section of the ESM.
IMPORTANT:
Follow all related Warnings, Cautions, and Notes in the ESM.
NOTE:
If the crankshaft is determined to be 360° off from 0° TDC on #1 cylinder compression stroke after removing the front timing chain front cover, put the crankshaft pulley back on, and then rotate the crankshaft 360° (when camshaft and crankshaft sprocket mating marks are aligned).
4. Remove the B2 oil jet using Remover Tool J-51269-1 (see Figure 1).
a. Install the remover tool onto the oil jet and flush against the engine block (see cutaway, Figure 1).
^ Align the hex bolts to contact the oil jets flat and worn sides.
^ Slide the threaded shaft all the way in the outer housing.
b. Hand tighten both hex bolts with an allen wrench.
^ Tighten enough to keep the remover tool from slipping, but no more.
c. Hold the remover tools outer housing with a wrench while turning the nut clockwise.
^ This procedure will extract the oil jet from the block.
^ If the oil jet is not extracted on the first attempt, steps 4a - 4c will need to be performed a second time.
d. Determine if oil jet replacement is possible by inserting the gauge pin into the blocks hole:
^ If the gauge pin cannot be inserted in the hole more than 3 mm, oil jet replacement can be completed. Go to Install Oil Jet below.
^ If the pin can be inserted more in the hole than 3 mm, this repair cannot be performed. Replace the "short engine" (short block) assembly.
NOTE:
The gauge pin comes with essential tool J-51269 Oil jet Remover/Installer Kit.
Install Oil Jet
1. Insert the new oil jet into installer tool J-51269-2.
^ Refer to the begining of this bulletin for tool information.
2. Mount the installer tool to the block.
^ With the oil jet inserted in the installer tool, position the other end of the oil jet in the blocks hole, and then align and finger tighten the three bolts.
^ Finger tighten the bolts enough to position the installer tool flush to the block.
3. Install the press bolt with your fingers until it bottoms out on top of the oil jet.
4. Next, tighten the press bolt two (2) full turns.
^ Confirm the oil jet is centered and aligned.
5. With a suitable tool, hand tighten, but not over-tighten, the three bolts.
^ Make sure the installer tool is flush with the block.
6. Tighten the press bolt until the oil jet bottoms out on the block.
7. Confirm the following:
^ Confirm the oil jet is flush with the block.
> If the oil jet is not properly installed on the first attempt, steps 2 - 7 will need to be performed a second time.
8. Once proper oil jet installation is confirmed, reassemble the engine with new B1 and B2 timing chains.
^ Always replace related seals, o-rings and gaskets as noted in the ESM.
^ Replace timing chain related components as necessary.
^ Refer to the B ENGINE > EM Engine Mechanical section of the ESM.
9. Install the battery cables, negative cable last.
10. Reprogram the radio presets.
11. Reset / initialize all applied systems i.e. power windows, clock, sunroof, etc.
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