Some 2003 – 2007 model year 4Runner, FJ Cruiser vehicles with 1GR-FE engines may
display evidence of a small oil leak located where the Bank 1 cylinder
head, engine block, and timing cover meet. Use the following repair
procedure to address this condition.

Note: Affects 2003 – 2007 model year 4Runner vehicles equipped with
the 1GR-FE engine produced BEFORE the Production Change Effective VINs
shown in Chart 1 (affects 2007 FJ Cruiser only).

1. Inspect the location where the Bank 1 cylinder head, engine block, and timing cover meet for signs of an oil leak (Figure 1).

2. Use an oil dye to confirm the source of the oil leak.

3. Remove and reseal the timing cover if leak is confirmed. Refer to Toyota’s Technical Information System (TIS) or appropriate service manual.

 

4. Confirm that the repair corrected the condition.

Some or all of this information was provided by the Automotive
Parts Remanufacturers Association (APRA). For more information on
technical bulletins available through APRA call 703-968-2772 or visit www.AutoBulletins.com.