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Is it possible to do Compression check w/ motor out of car

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Old Feb 12, 2003 | 12:32 PM
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Propulsion's Avatar
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From: Norcal
Default Is it possible to do Compression check w/ motor out of car

say I make a trip down to HMO, could I pick a motor and do the compression test right there? JUst take a big rachet and spin the crank? or is that not possible?
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Old Feb 12, 2003 | 01:12 PM
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Default Re: Is it possible to do Compression check w/ motor out of car (SilverCIVIC96)

i would think so...i'm not sure...i do know u can jump the starter so the engine can turn to perform a compression check so crankin it manually should get you the desired effect.
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Old Feb 12, 2003 | 01:34 PM
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Default Re: Is it possible to do Compression check w/ motor out of car (SilverCIVIC96)

It would not be accurate cuz you cant spin it as fast as the starter spins it, and since theres always some leakdown, the slower you spin it the less accurate it would be. and you can use the starter method, but that would require the you have the tranny bolted up to the motor.


[Modified by BluntMan, 2:35 PM 2/12/2003]
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Old Feb 12, 2003 | 04:22 PM
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Default Re: Is it possible to do Compression check w/ motor out of car (SilverCIVIC96)

there is one way... if the tranny is connected

bring a battery jumper

connect the jumper to the starter it should turn the engine over quick enough to get the numbers

but this is all if the engine has a tranny and if you can find nuetral
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Old Feb 12, 2003 | 04:57 PM
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Default Re: Is it possible to do Compression check w/ motor out of car (pornstarSR)

crank it by hand and go for consistancy rather then high nunmbers.
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Old Feb 12, 2003 | 05:47 PM
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kyle h.'s Avatar
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Default Re: Is it possible to do Compression check w/ motor out of car (EE4)

if you crank it by hand you should beable to get some compression reading. maybe use a drill with socket to spin it? or something like it.


[Modified by kyle h., 2:48 AM 2/13/2003]
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Old Feb 14, 2003 | 11:05 AM
  #7  
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Default Re: Is it possible to do Compression check w/ motor out of car (SilverCIVIC96)

U can't crank fast enough w a droill or by hand the reading u would get would be inacurate and low try to do b4 u pull out
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Old Feb 14, 2003 | 11:11 AM
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Default Re: Is it possible to do Compression check w/ motor out of car (ExospeedLsV)

how do you crank it manually?
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