Engine - Valve Timing Procedure
L-SB-0091-08Rev1
September 10, 2008
2GR-FE, 2GR-FSE, 3GR-FSE, 4GR-FSE Valve Timing Procedure
Service Category
Engine/Hybrid System
Section
Engine Mechanical
Market
USA
Applicability
TSB REVISION NOTICE
^ September 11, 2008 Rev1:
^ Figures 5 and 6 have been updated.
Any previous printed versions of this service bulletin should be discarded.
Introduction
This service bulletin provides information regarding valve timing inspection and service guidelines for vehicles equipped with 2GR-FE 2GR-FSE 3GR-FSE and 4GR-FSE engines.
Warranty Information
Inspection
1. Set the No.1 cylinder to TDC/compression.
A. Set the timing mark to 0 on the timing chain cover by rotating the crankshaft clockwise.
B. Verify the timing marks on the camshaft timing gears are in general alignment with the timing marks of the camshaft bearing cap:
HINT
When the engine is correctly timed, the timing marks will NOT perfectly align.
HINT
If the timing marks appear vastly out of alignment, turn the crankshaft one revolution (360°) clockwise and note the position of the timing marks.
Component Removal Guidelines
1. If engine disassembly is required that involves removing the camshafts or timing gears set the # 1 cylinder to TDC compression wipe away any oil and mark the following items in relation to each other prior to disassembly:
^ Timing gears
^ Timing chain
^ Timing chain No. 2
NOTE
This relationship MUST be maintained. The intake gear is timed in relation to the crankshaft via the timing chain; the exhaust gear is timed in relation to the intake gear via the No.2 timing chain.
2. If NEW camshaft timing gears or the No.2 timing chain are being installed the two yellow links on the No.2 timing chain can be used to ensure correct relationship between the intake timing gear and the exhaust timing gear.
A. Align the paint mark on the timing chain with the intake gear timing mark (to ensure the intake gear is correctly timed to the crankshaft).
B. Align the two yellow links on the No.2 timing chain to the timing marks on the new camshaft gears (to ensure the exhaust gear is correctly timed to the intake gear).