how to compression test pulled engine - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Mr. Spool · 11-25-2004, 06:17 PM

I have no Idea how to do a compression test on my pulled engine. it is still conected to its transmission and starter. any help would be apreciated. thanks.

thx247 · 11-25-2004, 11:22 PM

12 volts to the starter should turn the motor over. Remove plugs, hookup guage and fire away. Make sure its not in gear.

If it has not been run in awhile you might have some low numbers if the oil has all drained into the pan. You also will have low numbers since the motor is cold.

PSI240SX · 11-26-2004, 06:09 AM

just make sure the battery you are using is strong enough to turn the motor over fast enough, also make surre you have someone to hold the motor as it will move when turning over.

Mr. Spool · 11-26-2004, 09:12 AM

I tried doing the 12v thing, but all it does is shoot the starter thingy out but it does not spin it. I for some reason have to groung out the base of the starter to get it to turn. I will go out and try it again.

Mr. Spool · 11-26-2004, 09:15 AM

If I get it to work the numbers should all still be roughly the same correct.

11-25-2004, 06:17 PM	#1
Mr. Spool Zilvia Addict Join Date: Jan 2003 Location: East Side, Michigan Age: 44 Posts: 622 Trader Rating: (0) Feedback Score: 0 reviews	how to compression test pulled engine I have no Idea how to do a compression test on my pulled engine. it is still conected to its transmission and starter. any help would be apreciated. thanks. __________________ 96' SE Turbo'd Super 60, S-AFC, SMIC, 370cc Injectors, Open Air BOV, Warblo 255 pump, Stage 3 Clutch Kyb agx, Sportline Springs Full body kit, Bomex rear, Drift sides, r34 front gunmetal rims, yok tires

11-25-2004, 11:22 PM	#2
thx247 Zilvia FREAK! Join Date: Jan 2003 Location: bay area Posts: 1,455 Trader Rating: (0) Feedback Score: 0 reviews	12 volts to the starter should turn the motor over. Remove plugs, hookup guage and fire away. Make sure its not in gear. If it has not been run in awhile you might have some low numbers if the oil has all drained into the pan. You also will have low numbers since the motor is cold. __________________ Finally down to 1 car again. Thank god.

11-26-2004, 06:09 AM	#3
PSI240SX Zilvia Addict Join Date: Jul 2001 Location: The Gunshine State Age: 50 Posts: 843 Trader Rating: (0) Feedback Score: 0 reviews	just make sure the battery you are using is strong enough to turn the motor over fast enough, also make surre you have someone to hold the motor as it will move when turning over. __________________ www.enjukuracing.com

11-26-2004, 09:12 AM	#4
Mr. Spool Zilvia Addict Join Date: Jan 2003 Location: East Side, Michigan Age: 44 Posts: 622 Trader Rating: (0) Feedback Score: 0 reviews	I tried doing the 12v thing, but all it does is shoot the starter thingy out but it does not spin it. I for some reason have to groung out the base of the starter to get it to turn. I will go out and try it again. __________________ 96' SE Turbo'd Super 60, S-AFC, SMIC, 370cc Injectors, Open Air BOV, Warblo 255 pump, Stage 3 Clutch Kyb agx, Sportline Springs Full body kit, Bomex rear, Drift sides, r34 front gunmetal rims, yok tires

11-26-2004, 09:15 AM	#5
Mr. Spool Zilvia Addict Join Date: Jan 2003 Location: East Side, Michigan Age: 44 Posts: 622 Trader Rating: (0) Feedback Score: 0 reviews	If I get it to work the numbers should all still be roughly the same correct. __________________ 96' SE Turbo'd Super 60, S-AFC, SMIC, 370cc Injectors, Open Air BOV, Warblo 255 pump, Stage 3 Clutch Kyb agx, Sportline Springs Full body kit, Bomex rear, Drift sides, r34 front gunmetal rims, yok tires