Some 2005-2010 Nissan Pathfinders, Xterras and Frontiers may exhibit a high-frequency buzzing/whining noise at the secondary timing chain system. The noise should increase in frequency with engine speed. If the noise does not increase with engine speed, the timing chain system may not be the cause.

Replace both secondary timing chains and both secondary timing chain tensioner shoes.

Change the engine oil and filter.

PARTS INFORMATION

ITEM                                                P/N                                QTY

Engine oil filter………………..15208-9E000…………………1

Drain plug washer……………11026-01M02………………..1

Secondary timing chain……...13028-ZK01C………………..2

Tensioner shoe……………….13097-ZK01C………………..2

O-ring, front cover…………..…15066-2Y510………………...2

O-ring, front cover…………..…15066-5E510………………...2

Crankshaft seal………………..13510-7Y000………………..1

ThreeBond 1217F sealant……999MP-1217FPP……...……1

Tool J-50246 (Tensioner shoe installer and chain tensioner pins) and Tool J-48761 are considered essential.

SERVICE PROCEDURE

1. Record all radio station presets.

2. Disconnect both battery cable (negative cable first).

3. Remove the secondary timing chains (Note: It is not necessary to remove the valve covers or intake collector.

• Before removing the crankshaft pulley, set it to 0-degrees TDC
• Use Tool J-48761 to secure the flywheel/flexplate when removing the crankshaft pulley and camshaft sprockets. Figure 1 shows J-48761 installed on an AWD vehicle. Note: the camshaft sprocket bolts will be removed and installed while being held by all three timing chains.
• If the crankshaft is determined to be 360-degrees from 0-degree TDC on #1 cylinder compression stroke after removing the front timing chain case (front cover), reinstall the crankshaft pulley and rotate the crankshaft 360 degrees (when camshaft and crankshaft sprocket mating marks are aligned).
• Use the chain tensioner pins from Tool Kit J-50246 to hold all three chain tensioner plungers. Figure 3 shows a pin used on B2 tensioner. Note: The primary timing chain will be resused. If the original marks are not legible, it is recommended to mark this chain to all three sprockets with “white-out” or suitable marking before removing.

4. Remove the Secondary Timing Chain tensioner shoes by evenly prying with a couple of pocket screwdrivers or suitable tool where shown in Figure 2. Note: Leave the pins from Tool J-50246 in each tensioner until the timing chains are installed.

5. Install the new shoes to the tensioners with Tool J-50246 (see Figure 3). Tighten the bolt until the shoe is fully seated. Caution: Tighten the bolt no more than necessary.

6. Install the new secondary timing chains. Refer to the service manual as needed.

7. Reassemble the rest of the engine. Torque the camshaft sprocket bolts with all timing chains installed, using Tool J-48761 to hold the crankshaft. Make sure that all three pins are removed before installing the front cover.

8. Reconnect the battery cables (negative cable last).

9. Re-program radio presets and re-set/initialize all applied systems (power windows, clock, sunroof, etc.).

Tools J-48761 (left) and Tool J-50246 (right) are needed for this service.

Figure 1. Example of Tool J-48761 installed to hold the flywheel.

Figure 2. Remove the secondary timing chain tensioner shoes by prying as shown.

Figure 3. Install the new shoes to the tensioners using Tool J-50246,