Question about 1991 Chevrolet Caprice

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I have a 91 caprice make knocking noise when I crank it

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  • Terious Bone
    Terious Bone Apr 25, 2015

    Some say its my flywheels... or something in my motor

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2 Answers

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  • Chevrolet Master
  • 42,190 Answers

If auto , check the flex plate at the torque converter for cracks
check ring gear for burrs
possible big end bearing
possible piston or broken ring
test by removing a plug and cranking it replace the plug and go to the next plug
repeat the process until the knock stops with that plug removed

Posted on Apr 25, 2015

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  • Contributor
  • 18 Answers

Knocking when you are starting it? The teeth plate (don't know English name) where the starter touch motor to make it turn on. It must be broken or loose.

Knocking in idle and you can not identify the source? Look the idle. Pulley, if belt or pulley"jump" with knock, it is the cause

Touch the time black cover with motor in idle. If Knocking is in a regular pattern, your motor is broken. If erratic and feel the knock at hand when you hear it, probably a Pulley is begin to damage( all, steering pump, air...)

Tbilisi black cober

Posted on Apr 26, 2015

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Posted on Jan 02, 2017

  • 76 Answers

SOURCE: my 91 caprice makes a wind noise or a whining

If you can not identify the origen, most probable cause is the idle poley. Change it before it broke or you will need a trailer

Posted on Nov 09, 2009

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