Engine - Ticking Noise

Section Title: Engine
TSB No. TS 02 12112

Division: Automotive
Category: General

SUBJECT
ENGINE TICKING NOISE

MODEL(S):
VITARA (SQ 420), GRAND VITARA (SQ 625), GRAND VITARA XL7
(JA627), ESTEEM (SY418), AERIO (RH 420)

YEAR:
1999-2003

CONDITION:

A condition may exist of a tick noise that is heard during cold or hot engine operation. The condition is most noticeable in a vehicle where the engine has not been run for extended periods of time. This condition also is noticed following lifter or camshaft repairs.

CAUSE:

This condition may be caused by oil drain down in which air may get trapped in valve lifters not allowing for proper lifter adjustment.

CORRECTION:

Perform the following procedure to purge air trapped in the valve lifters before any major engine repairs.

REPAIR PROCEDURE:

1. Apply the emergency brake and place the transmission in park or neutral.

2. Run engine at 2,000 RPM for approximately 20 minutes. After the 20 minutes has elapsed the air should be purged and the noise should stop.

3. Every 5 to 10 minutes check coolant temperature and instrument panel indicator lamps during the run time.

4. After the specified run time recheck for lifter noise at idle.

^ Note:
If the noise is still present after performing above procedure locate the defective lifter(s) by using a listening device and replace it (them). Or remove the valve cover(s) with engine stopped and push lifter down by hand with a force less than 20 kg (44 lbs.) when camshaft is on the base circle. If clearance exists between the camshaft and the lifter the lifter is defective and should be replaced.





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