NUMBER: 02-146-13R
DATE: 10/07/13
REVISED: 02/05/15
| APPLICABILITY: | 2012-13MY Impreza 2.0L |
| 2013MY XV Crosstrek | |
| SUBJECT: | Revised Valve Train Parts to Reduce a Warm Engine Tapping or Sewing Machine type Sound from the Left Cylinder Head |
INTRODUCTION
This bulletin announces the availability of revised valve train components developed to reduce a tapping sound which may be heard coming from the left-hand (B2) side of the engine when the engine is warm. This bulletin does not address any cold engine or start-up sounds. The changes consist of:
- Design change to the valve rockers
- Camshaft profile change
- Increased intake valve stem length (1.65mm longer Intake, 2.4mm longer Exhaust)
In addition, the insulator pad has been eliminated from the B2 intake manifold protector.
COUNTERMEASURE IN PRODUCTION
| VEHICLE | Model | Starting VIN / Production Date |
|---|---|---|
| Impreza and XV Crosstrek | 4-Door | D*005801 / August 8, 2012 |
| 5-Door | D*209069 / August 22, 2012 |
NOTE: 2013MY 5-Door models with the 12th VIN character = ”8” (e.g D*8*****), are all AFTER this countermeasure.
PART INFORMATION
| PART NAME | Part Number | NEW | OLD |
|---|---|---|---|
| INTAKE VALVE | 13201AA670
Subaru Valve-Intake
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API | 13201AA640
Genuine Subaru 13201AA640 Valve Intake, 1 Pack
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API | |
| Change | Valve stem length:
104.95mm | Valve stem length:
103.3mm | |
| Identification | I31 | I22 | |
| EXHAUST VALVE | Part Number | 13202AA750 No products found. | 13202AA670 No products found. |
| Change | Valve stem length:
96.5mm | Valve stem length:
94.1mm | |
| Identification | E3 | E2 | |
| VALVE ROCKER | Part Number | 13249AA250
Subaru Genuine 13249AA250 Rocker Complete, 1 Pack
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API | 13249AA240
Subaru Genuine 13249AA240 Rocker Complete, 1 Pack
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API |
| Change | Change to roller portion | – | |
| Identification | Circular groove added on pivot side | No groove | |
| PIVOT, ROCKER ARM | Part Number | 13296AA090 | 13296AA051 |
| Change | Not specified | – | |
| SPECIAL NOTE:
These revised Pivots have been installed during production starting with VIN: D*005801 Impreza (4-Door) D*209069 Impreza and XV Crosstrek (5-Door) | – | ||
| CAMSHAFT INTAKE, LEFT | Part Number | 13037AA940 | 13037AA860 |
| Change | Cam profile change | – | |
| Identification | 38B340 or 38B390 | 38B260 or 38B310 | |
| CAMSHAFT EXHAUST, LEFT | Part Number | 13052AA940 | 13052AA860 |
| Change | Cam profile change | – | |
| Identification | 53B340 or 53B390 | 53B260 or 53B310 | |
OEM
The illustrations below show additional information about the changes to the valve rockers, camshafts and valves to help readily distinguish them from the previous version parts.
SERVICE PROCEDURE / INFORMATION
If you receive a customer concern of a tapping sound from the B2 cylinder head, confirm it is isolated to the B2 valve train area before proceeding with any repairs. Once verified, order and replace all 4 intake and all 4 exhaust valves, all 8 rockers, both the intake and the exhaust camshaft and all 8 rocker arm pivots (Replace the rocker arm pivots only if the VIN is prior to the listed VIN breakpoint shown in the Parts Information area of this bulletin) as a set using the part numbers shown in this bulletin (in addition to the necessary gaskets and seals). Refer to the service procedures outlined in the applicable Service Manual for installation.
NOTE: When resetting the valve clearances, the intake should be set to 0.13mm +0.02 / – 0.03 and the exhaust should be set to 0.22mm +/- 0.02. These are revised specifications and not reflected in the Service Manual.
IMPORTANT: Do not mix old and new parts together or mix parts between the left and right cylinder head as it will become impossible to obtain valve clearances that are within specification.
TIP: An egg carton makes a perfect organizer tray. Make sure to mark it as necessary (front, intake, exhaust) to eliminate any mixing of parts.
WARRANTY / CLAIM INFORMATION
For vehicles within the Basic New Car Limited and/or Powertrain Warranty, this repair may be claimed using the following information:
| LABOR DESCRIPTION | LABOR OPERATION # | FAIL CODE | TRANSMISSION | LABOR TIME |
|---|---|---|---|---|
| Engine R&R for Cylinder Head Servicing | B293-110 | ABH-48 | 5MT | 2.7 |
| CVT | 3.0 | |||
| L/H Cylinder Head &/or Gasket R&R | C293-112 | – | 4.9 | |
| Valves- Replace | C293-123 | 1.6 | ||
| Valve Train Noise Diagnosis | C243-001 | 0.3 |
REMINDER: SOA strongly discourages the printing and/or local storage of service information as previously released information and electronic publications may be updated at any time.
- Always refer to STIS for the latest service information before performing any repairs.
NHTSA ID Number: 10235909
Manufacturer Communication Number: 0214613
Summary
Revised Valve Train Parts to Reduce a Warm Engine Tapping or Sewing Machine type Sound from the Left Cylinder Head
1 Associated Document
Manufacturer Communications
NUMBER: 02-146-13
DATE: 10/07/13
MC-10235909-9999.pdf 493.665KB
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Last update on 2026-06-14 / Affiliate links / Images from Amazon Product Advertising API
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