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If necessary, connect a battery charger to the battery before starting the compression test. It is ...
Views: 496
Filesize: 1.19MB
Date: May 30, 2017
 Select the proper adapter for the compression gauge. The threads on the adapter should match those ...
Views: 361
Filesize: 1.13MB
Date: May 30, 2017
 Remove all of the spark plugs. Be sure to mark the spark plug wires so that they can be reinstalled ...
Views: 327
Filesize: 1.11MB
Date: May 30, 2017
 Before removing the spark plugs, use an air nozzle to blow away any dirt that may be around the ...
Views: 312
Filesize: 1.07MB
Date: May 30, 2017
Block open the throttle (and choke, if the engine is equipped with a carburetor). Here a screwdriver ...
Views: 325
Filesize: 1.15MB
Date: May 30, 2017
 To prevent ignition and fuel-injection operation while the engine is being cranked, remove both the ...
Views: 339
Filesize: 1.14MB
Date: May 30, 2017
 The tools and equipment needed to perform a compression test include a compression gauge, an air ...
Views: 433
Filesize: 1.01MB
Date: May 30, 2017
 A tester that uses a blue liquid to check for exhaust gases in the exhaust, which would indicate a ...
Views: 391
Filesize: 1.42MB
Date: May 30, 2017
A technician-made adapter used to test exhaust system back pressure.
Views: 404
Filesize: 520.38kB
Date: May 30, 2017
 A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ...
Views: 377
Filesize: 54.37kB
Date: May 30, 2017
 A steady needle reading that rises 2 or 3 inches Hg when the engine speed is increased slightly ...
Views: 416
Filesize: 14.24kB
Date: May 30, 2017
 A steady needle reading that drops 2 or 3 inches Hg when the engine speed is increased slightly ...
Views: 426
Filesize: 14.41kB
Date: May 30, 2017
Weak valve springs will produce a normal reading at idle, but as engine speed increases, the needle ...
Views: 444
Filesize: 49.35kB
Date: May 30, 2017
 If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ...
Views: 403
Filesize: 46.45kB
Date: May 30, 2017
 A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ...
Views: 390
Filesize: 50.33kB
Date: May 30, 2017
 An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ...
Views: 370
Filesize: 50.79kB
Date: May 30, 2017
A leaking head gasket can cause the needle to vibrate as it moves through a range from below to ...
Views: 405
Filesize: 25.03kB
Date: May 30, 2017
 A gauge reading with the needle fluctuating 3 to 9 inches Hg below normal often indicates a vacuum ...
Views: 452
Filesize: 49.67kB
Date: May 30, 2017
 A steady but low reading could indicate retarded valve or ignition timing.
Views: 408
Filesize: 44.39kB
Date: May 30, 2017
 An engine in good mechanical condition should produce 17 to 21 inches Hg of vacuum at idle at sea ...
Views: 444
Filesize: 96.02kB
Date: May 30, 2017
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