Canada - Engine - Engine Knock/Rattle On Cold Startup: Overview

Bulletin
TSB2448
REVISED

Issue Date
July 19, 2007

Title
BRIEF ENGINE KNOCK/RATTLE NOISE AT COLD STARTUP

Component
ENGINE MECHANICAL

Models
'06 - '08 IS 250/350

TSB REVISION NOTICE:
- June 11, 2009: Applicability has been updated to include 2008 model year vehicles.
- VINs have been updated in the Production Change Information table.
- The OFPs have been updated in the Warranty Information table.
- Part numbers for the Camshaft Timing Gear Assembly have been updated in the Parts Information table.
- November 1, 2007: The Production Change Effective VIN has been updated in Production Change Information. The Parts Information table has been updated.
Previous versions of this TSB should be discarded.

INTRODUCTION:

Immediately following a cold soak startup, some 2006 - 2008 model year IS 250/350 vehicles may exhibit a brief rattle/knock noise from the engine compartment for approximately one second. Refer to the repair procedure below to address customer concerns.

APPLICABLE VEHICLES:

PRODUCTION CHANGE INFORMATION:

This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown.

WARRANTY INFORMATION:

PARTS INFORMATION:

IS 250

IS 350