Grand Vitara 2WD V6-2.7L (2006)

Drive Belt: All Technical Service Bulletins
Engine - Knocks At Idle When Warmed Up
Section Title: Engine
TSB No. TS 22 04239R
Division: Automotive
Category: Technical
Revision:
Note added to adjustment methods.
SUBJECT:
ENGINE KNOCKS AT IDLE WHEN FULLY WARMED UP: DRIVE BELT TENSION CHANGE.
MODEL(S): GRAND VITARA (JB627)
YEAR: 2006~2008
AFFECTED VIN(S):
VEHICLES UP TO PRODUCTION DATE OF JULY 9, 2007
CONDITION:
After the engine completely warms up a knocking noise can be heard from the bottom of the engine.
CAUSE:
Mis-adjusted drive belt tension will cause the engine crank shaft to abnormally oscillate, which can produce an audible knock sound, similar to excessive
bearing clearance noise (bottom end knock).
NOTE:
The mis-adjusted belt will not result in internal engine damage.
CORRECTION:
The tension of the water pump/alternator belt was changed in production from 700N to 650N to reduce this audible knock. Use one of the two
procedures below to adjust the drive belt tension of the water pump / alternator belt to the new specification found in the instructions. Also verify the
tension is correct on the power steering / A/C belt. Engine should be cold when adjustment is made. Adjustments of the drive belts using the values in
this TSB will minimize the noise heard.
PART(S) INFORMATION/WARRANTY INFORMATION
Drive Belt Tension Adjustment Procedure
Water Pump/Alternator Drive Belt Tensioner Adjustment Procedure.