Running a compression test without the Intercooler fully hooked up - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sherlockhomeboy · 06-21-2016, 01:09 PM

Sorry if this is a stupid question, but I've been searching around and haven't really found a direct answer.

I'm looking to buy an rb20det from this guy and am going to run a compression test on it today, however at this moment the intercooler piping isn't all fully connected. Would this throw off the compression test at all?

Definitely willing to connect all the piping as it's not much work at all but just curious if having the intercooler not fully hooked up would it lead to an inaccurate compression test?

Thanks

greenwood · 06-21-2016, 01:51 PM

not needed for compression test.

Have him do with throttle open.

Kingtal0n · 06-21-2016, 01:52 PM

No it will not have any affect.

When you compression test, make sure you WRITE DOWN THE NUMBER. Make it as EXACT as possible like this: 132.5, 137.0, 134.0, 135.5

Each cylinder should be very close in reading, very little variation. ALL Of them need to be close together within a few psi of each other.

sherlockhomeboy · 06-21-2016, 07:23 PM

Awesome thanks guys

heychris · 06-21-2016, 11:37 PM

OP......Google is your friend....

Ch

sent from knee deep in snow

cotbu · 06-22-2016, 10:04 AM

Take all the spark plugs out and crank it freely first, you want to be able to listen.
unless you are going to buy the engine based on compression numbers alone.

06-21-2016, 01:09 PM	#1
sherlockhomeboy Zilvia Member Join Date: Apr 2011 Location: Moreno Valley CA Posts: 251 Trader Rating: (7) Feedback Score: 7 reviews	Running a compression test without the Intercooler fully hooked up Sorry if this is a stupid question, but I've been searching around and haven't really found a direct answer. I'm looking to buy an rb20det from this guy and am going to run a compression test on it today, however at this moment the intercooler piping isn't all fully connected. Would this throw off the compression test at all? Definitely willing to connect all the piping as it's not much work at all but just curious if having the intercooler not fully hooked up would it lead to an inaccurate compression test? Thanks

06-21-2016, 01:52 PM	#3
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 38 Posts: 4,649 Trader Rating: (17) Feedback Score: 17 reviews	No it will not have any affect. When you compression test, make sure you WRITE DOWN THE NUMBER. Make it as EXACT as possible like this: 132.5, 137.0, 134.0, 135.5 Each cylinder should be very close in reading, very little variation. ALL Of them need to be close together within a few psi of each other. __________________ 5.3/4l80e/turbo 240sx playthrough: https://tinyurl.com/turbo240

06-22-2016, 10:04 AM	#6
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Take all the spark plugs out and crank it freely first, you want to be able to listen. unless you are going to buy the engine based on compression numbers alone. __________________ LoverTechnologies "Half Broken Things!"

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06-21-2016, 01:51 PM	#2
greenwood Zilvia Addict Join Date: May 2011 Location: nc Posts: 618 Trader Rating: (5) Feedback Score: 5 reviews	not needed for compression test. Have him do with throttle open.

06-21-2016, 07:23 PM	#4
sherlockhomeboy Zilvia Member Join Date: Apr 2011 Location: Moreno Valley CA Posts: 251 Trader Rating: (7) Feedback Score: 7 reviews	Awesome thanks guys

06-21-2016, 11:37 PM	#5
heychris Zilvia Addict Join Date: Oct 2007 Location: SkiTown USA Posts: 754 Trader Rating: (20) Feedback Score: 20 reviews	OP......Google is your friend.... Ch sent from knee deep in snow