Vibration Analysis - Engine Balance Test Description - Suzuki XL7 2007 Service Manual

1D-50 Engine Mechanical:
Vibration Analysis - Engine Balance
Test Description
The numbers below refer to the step numbers on the
diagnostic table.
4.
If sufficient clearance exists to separate the transmission
torque converter from the engine flywheel/flexplate, then
further tests can be used to isolate the transmission from
the engine.
5.
An engine flywheel/flexplate that has excessive lateral
runout, when combined with the mass of the
transmission torque converter, can produce a
disturbance.
6.
An engine flywheel/flexplate that is loose at the engine
crankshaft or that is cracked or damaged, when
combined with the mass of the transmission torque
converter, can produce a disturbance.
7.
This step is designed to isolate the transmission from the
engine to determine if the disturbance is related to the
engine ONLY.
9.
Re-indexing the transmission torque converter to the
engine flywheel/flexplate alters the balance relationship
between the torque converter and the rear of the engine.
11.
Placing the J 38792-A sensor onto the underside of the
engine oil pan along the FRONT and the REAR edge
allows for a determination to be made, which will help to
narrow down the cause of the disturbance.
13.
Step
WARNING
!
Refer to Work Stall Test Caution.
Were you sent here from the Vibration Analysis - Engine/
1 Accessory Isolation table?
Is the J 38792-A, Electronic Vibration Analyzer (EVA) 2,
2
available?
3 Is the vehicle equipped with a manual transmission?
1. Raise and support the vehicle. Refer to "Lifting and
Jacking the Vehicle: ".
2. Remove the flywheel/flexplate-to-torque converter bolts
access cover, if equipped.
3. Determine if sufficient clearance exists to separate the
4
transmission torque converter away from the engine
flywheel/flexplate and safely secure the torque converter
from accidentally engaging with the flywheel/flexplate.
Is there sufficient clearance to separate and safely secure the
transmission torque converter away from the engine flywheel/
flexplate?
An engine flywheel that has excessive lateral runout,
when combined with the extra mass of the clutch
pressure plate and clutch driven plate, can produce a
disturbance.
14.
The clutch pressure plate and the engine flywheel are
marked for proper indexing of the heavy-spot of one to
the light-spot of the other. Improper indexing of the
pressure plate to the flywheel can produce a
disturbance.
15.
An engine flywheel that is loose at the engine crankshaft
or that is cracked, damaged and/or missing balance
weights; and/or a clutch pressure plate and clutch driven
plate that has loose springs, cracks, warpage, damage
and/or missing balance weights - can produce a
disturbance when their mass is combined.
16.
An engine flywheel that is loose at the engine crankshaft
or that is cracked, damaged and/or missing balance
weights; and/or a clutch pressure plate and clutch driven
plate that has loose springs, cracks, warpage, damage
and/or missing balance weights - can produce a
disturbance when their mass is combined.
17.
Re-indexing the pressure plate to the engine flywheel
alters the balance relationship between the pressure
plate/flywheel assembly and the rear of the engine.
18.
An engine flywheel/flexplate that is damaged,
misaligned, and/or imbalanced, can produce a
disturbance.
19.
An engine crankshaft balancer that is damaged,
misaligned, and/or imbalanced, can produce a
disturbance.
Action Yes
Go to "Vibration
Go to Step 2 Analysis - Engine/
Accessory Isolation"
Go to "Vibration
Go to Step 3
Diagnostic Aids: "
Go to Step 11 Go to Step 4
Go to Step 5 Go to Step 11
No