Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power
Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power
Service Manual, General Motors 4.3L Engine (TP ... - Kohler Power
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<strong>Engine</strong> Marine/Industrial <strong>4.3L</strong> 6-21<br />
Test the drive belt tensioner for proper operation. Refer to Drive<br />
5 Belt Tensioner Diagnosis.<br />
Drive Belt Squeal Diagnosis (cont’d)<br />
Step Action Value(s) Yes No<br />
Did you find and correct the condition? — Go to Step 9 Go to Step 6<br />
Inspect for the correct drive belt length. Refer to Drive Belt<br />
6 Replacement.<br />
Did you find and correct the condition? — Go to Step 9 Go to Step 7<br />
7<br />
8<br />
9<br />
Inspect for a misalignment of a pulley.<br />
Did you find and correct the condition? — Go to Step 9 Go to Step 8<br />
Inspect for the correct pulley size.<br />
Go to<br />
Did you find and correct the condition? — Go to Step 9 Diagnostic Aids<br />
Operate the system in order to verify the repair.<br />
Did you correct the condition? — System OK Go to Step 3<br />
Drive Belt Whine Diagnosis<br />
Diagnostic Aids<br />
The drive belt(s) will not cause the whine noise.<br />
If the whine noise is intermittent, verify the accessory<br />
drive components by varying their loads making sure<br />
they are operated to their maximum capacity. An<br />
overcharged A/C system, power steering system with<br />
a pinched hose or wrong fluid or a generator failing<br />
are suggested items to inspect.<br />
Test Description<br />
The number(s) below refer to the step number(s) on<br />
the diagnostic table.<br />
3. This test is to verify that the noise is being<br />
caused by the drive belt(s) or the accessory drive<br />
components. When removing the drive belt(s), the<br />
water pump may not be operating and the engine<br />
may overheat. Also DTCs may set when the<br />
engine is operating with the drive belt(s)<br />
removed.<br />
4. The inspection should include checking the drive<br />
belt tensioner and the drive belt idler pulley<br />
bearings. The drive belt(s) may have to be<br />
installed and the accessory drive components<br />
operated seperately by varying their loads. Refer<br />
to the suspected accessory drive component for<br />
the proper inspection and replacement<br />
procedure.<br />
Drive Belt Whine Diagnosis<br />
Step Action Value(s) Yes No<br />
Notice: Refer to Belt Dressing Notice in Cautions and Notices.<br />
DEFINITION: A high pitched continuous noise that may be caused by an accessory drive component failed bearing.<br />
1<br />
2<br />
Did you review the Drive Belt Symptom operation and perform<br />
Go to Symptomsthe<br />
necessary inspections? — Go to Step 2 Drive Belt<br />
Verify that there is a whine noise.<br />
Go to<br />
Does the engine make the whine noise? — Go to Step 3 Diagnostic Aids<br />
1. Remove the drive belt(s).<br />
3 2. Operate the engine for no longer than 30 to 40 seconds. Go to <strong>Engine</strong><br />
Does the whine noise still exist? — Noise Diagnosis Go to Step 4<br />
4<br />
9<br />
Inspect for a failed accessory drive component bearing.<br />
Go to<br />
Did you find and repair the condition? — Go to Step 5 Diagnostic Aids<br />
Operate the system in order to verify the repair.<br />
Did you correct the condition? — System OK —<br />
2000 Marine/Industrial
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