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Document ID: IK1201518

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ENGINE

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Author:

Greg
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Title : Belt Noise or Edge Fraying in HV / HX Vehicles Equipped with S13
Applies To : S13 Engines in HV and HX Chassis

CHANGE LOG
Please refer to the change log text box below for recent changes to this article:
06/17/2025 - Initial Article Release
06/24/2026 - Revised to include HV chassis

DESCRIPTION
Some low mileage S13 engines in HV and HX chassis may experience complaints of excess fan belt noise or chirping, and or
belt edge fraying. This document will guide the user through troubleshooting and Installation of the required parts needed to
correct the issue.

NOTE: HX with engine serial number (ESN) 6008637 and BELOW will require the instalation of a new front engine lifting
bracket and dual idler pulley bracket to correct these complaints. All other chassis will need to follow the diagnostic steps linked
below to pinpoint the cause.

SERVICE PARTS INFORMATION
Description

Part Number

Quantity
Required

Dual Idler Bracket Assembly

7104252C92

1

Single Idler Pulley

7100271C1

2

As Needed - all

Front Engine Lifting Bracket

7109329C1

1

HX with ESN 6008637 and Below As needed all others

Notes
HX with ESN 6008637 and Below
Only

Damper Bolt Kit

2523696C91

1

HX with ESN 6008637 and Below
Only

SPECIAL TOOL(s) or SOFTWARE

Tool Description

Tool Number

Comments

Source

DAYCO Belt
Diagnostic Kit

93874

Recommended for highest Amazon, local auto parts
accuracy
stores etc.

DIAGNOSTIC STEP(s)
1. For HX chassis with ESN 6008638 and Up, and ALL HV chassis with S13 engines follow the diagnostic steps outlined
HERE
2. For HX chassis with ESN 6008637 and BELOW, continue following the repair steps called out below to replace the lifting
bracket and idler pulley bracket assy.
NOTE: The component removal and installation instructions below can be used for reference on all chassis if needed

REPAIR STEP(s)

FRONT ENGINE LIFTING BRACKET

REMOVAL PROCEDURE:
1. Remove the fan belt using a 1/2" drive breaker bar to articulate the tensioner and slide the fan belt forward off the pulleys
2. Remove the M8 x 30 exhaust gas crossover pipe support bracket bolt (Figure #1 Item 1). NOTE: the pipe itself will stay in
place.

Figure #1: Exhaust Gas Crossover Pipe
Item 1: M8 x 30 Bolt

For the next step it is recommended to use two
people

3. Carefully loosen and remove the three M12 x 80 fan drive bracket mounting bolts (Figure #2 Item 1). USE CAUTION to
make certain the fan does not contact the radiator and is adequately supported

Figure #2: Fan Drive Bracket Mounting Bolts
Item 1: M12 x 80 Bolts

4. Remove the fourth M12 x 35 lifting bracket mounting bolt (Figure #3 Item 1) then remove the lifting bracket from the engine.

Figure #3: Bottom lifting eye mounting bolt behind fan drive bracket
Item 1: M12 x 35 bolt

INSTALLATION PROCEDURE:
5. Position the new 7109329C1 lifting bracket in place and install the lower M12 x 35 bolt (Figure #3 Item 1).

6. Temporarily install the three longer M12 x 80 bolts (Figure #2 Item 1) as guides, then torque ONLY the bottom M12 x 35 bolt
to 120 Nm +/- 12 Nm
7. Remove the three M12 x 80 bolts from step 6 and set aside
8. Re-install the fan drive assembly using the three M12 x 80 bolts (Figure #2 Item 1). Torque all three bolts to 120 Nm +/- 12
Nm, leave the fan belt off
9. Install the M8 x 30 Exhaust Gas Crossover Pipe support bolt (Figure #1 Item 1) and torque to 25 Nm.

DUAL IDLER BRACKET REPLACEMENT
REMOVAL PROCEDURE:
10. Remove the accessory drive belt using a 1/2" drive breaker bar to articulate the tensioner and slide the belt forward off the
pulleys
11. Remove the four accessory drive pulley bolts (Figure #4 Item 1) and remove the pulley

Figure #4: Accy Drive Pulley Bolts
Item 1: M12 x 1.25 x 40 bolts

12. Remove the 8 Torx bolts (Figure #5) securing the damper to the crankshaft using a Torx E-18 female socket

Figure #5: M14 Damper Mounting Bolts (8)

13. Remove the three M12 x 35 dual idler bracket mounting bolts (Figure #6 Item 1) then remove the bracket assembly and
discard

Figure #6: Dual Idler Bracket Mounting Bolts
Item 1: M12 x 35 Bolts

INSTALLATION PROCEDURE:
14. Install the new 7104252C92 dual idler bracket assembly with the three M12 x 35 bolts (Figure #6 Item 1) and torque to 120
Nm +/- 12 Nm
15. Re-install the vibration damper (Figure #7 Item 2) onto the crankshaft snout (Figure #7 Item 1) aligning the bolt holes to
the crankshaft flange.
16. Set the pulley adapter (Figure #7 Item 3) onto the face of the vibration damper and align the holes without spinning the
damper.
17. Install 8 new M14 damper bolts (Figure #7 Item 4) from the 2523696C91 bolt kit through the pulley adapter, vibration
damper, then into the crankshaft and torque to 60 +/- 5 Nm then turn 90° +/- 5°

Figure #7: Vibration Damper Assembly
Item 1: Crankshaft Snout
Item 2: Vibration Damper
Item 3: Pulley Adapter
Item 4: M14 Damper Bolts
18. Install the accessory drive pulley onto the adapter with the four M12 x 1.25 x 40 bolts (Figure #4 Item 1), and torque to 92
Nm
19. Re-install the accessory drive belt, and also the fan drive belt. Run the engine and check for any belt noise or operational
issue.

WARRANTY INFORMATION
Warranty Claim Coding:
Refer to the Warranty Coding Manual for Group and Noun Codes.

Standard Repair Time(s):
Refer to the SRT Manual for Repair Times

OTHER RESOURCES
Master Service Information Site

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