Revised Valve Train Parts to Reduce a Warm Engine Tapping Sound from the Left Cylinder Head – 2013 Subaru BRZ

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Bulletin Number: 02-151-14R; Date: 09/23/14 Page 1 INTRODUCTION This bulletin announces the availability of revised valve train components developed to reduce a tapping sound (sometimes described as “a sewing machine type” 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 • 1.65mm longer intake and 2.47mm longer exhaust valve stem lengths PART INFORMATION PART NAME NEW OLD INTAKE VALVE Part Number 13201AA660 13201AA600 Change Stem Length: Stem Length: 104.95mm 103.3mm Identification I3H I2H EXHAUST VALVE Part Number 13202AA790 13202AA710 Change Stem Length: Stem Length: 97.57mm 95.1mm Identification E3H E2H VALVE ROCKER Part Number 13249AA250 13249AA240 Change Change to Roller Portion n/a Identification Circular groove added on pivot side n/a INTAKE CAMSHAFT, LEFT Part Number 13037AA980 13037AA830 Change Cam Profile Change n/a Identification 38B370 38B230 NUMBER: 02-151-14R DATE: 04/22/14 REVISED: 09/23/14 APPLICABILITY: 2013MY BRZ SUBJECT: Revised Valve Train Parts to Reduce a Warm Engine Tapping Sound from the Left Cylinder Head SERVICE BULLETIN ATTENTION: GENERAL MANAGER q PARTS MANAGER q CLAIMS PERSONNEL q SERVICE MANAGER q IMPORTANT – All Service Personnel Should Read and Initial in the boxes provided, right. Continued… CAUTION: VEHICLE SERVICING PERFORMED BY UNTRAINED PERSONS COULD RESULT IN SERIOUS INJURY TO THOSE PERSONS OR TO OTHERS. Subaru Service Bulletins are intended for use by professional technicians ONLY. They are written to inform those technicians of conditions that may occur in some vehicles, or to provide information that could assist in the proper servicing of the vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do the job correctly and safely. If a condition is described, DO NOT assume that this Service Bulletin applies to your vehicle, or that your vehicle will have that condition. SUBARU OF AMERICA, INC. IS “ISO 14001 COMPLIANT” The international standard for excellence in Environmental Management Systems. Please recycle or dispose of automotive products in a manner that is friendly to our environment and in accordance with all local, state and federal laws and regulations. Bulletin Number: 02-151-14R; Date: 09/23/14 Page 2 PART NAME NEW OLD EXHAUST CAMSHAFT, LEFT Part Number 13052AA980 13052AA830 Change Cam Profile Change n/a Identification 53B370 53B230 PIVOT, ROCKER ARM Part Number 13296AA090 13296AA070 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 the intake and exhaust camshafts, the 4 intake valves, 4 exhaust valves, all 8 rockers and all 8 pivots. Refer to the service procedures outlined in the applicable Service Manual for installation. NOTE: When setting the valve clearances, the intakes should be set to 0.13mm +0.02 / – 0.03 and the exhausts set to 0.22mm +/- 0.02. These are revised clearance specifications and are not reflected in the Service Manual. IMPORTANT: Do not mix old and new parts together as it will become impossible to obtain intake 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. Identification Markings Addition of groove Continued… Bulletin Number: 02-151-14R; Date: 09/23/14 Page 3 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 H4 ENGINE R&R FOR CYLINDER HEAD SERVICING B293-130 AER-48 M/T 2.8 6AT 3.3 LH CYLINDER HEAD R&R C293-132 All 5.2 ALL INTAKE VALVES REPLACE, ONE CYLINDER HEAD Includes: Valve Seating, R&R of the Springs, Valve Seals & Valve Adjustment C293-123 1.6 VALVE TRAIN NOISE DIAGNOSIS C243-001 0.3

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