Compression Test: One Crank Hold or 4-6 Cranks ??
Thread Starter
Junior Member
Joined: May 2005
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From: Madison, Wi, Country
Compression Test: One Crank Hold or 4-6 Cranks ??
Well this is a long story but to make it short and simple my buddy and i were discussing which is the right way to do a compression test. Is it:
1. Crank once and hold for 4-6 seconds
or
2. Crank 4-6 times
the first time i ever did a compression test on my motor was with the one crank and hold for 4-6 seconds NOT WOT which yield 125psi on all four cyclinders. i thought this was weird because that is super low compression for a jdm gsr motor because my car ran fine. this was about five weeks ago.
yesterday i did another compression test but this time with process #2...i crank the motor 4-6 times WOT and yield 248-251 on all four cyclinders. this i thought was kind of high.
conclusion: which is the RIGHT way of doing it?
1. Crank once and hold for 4-6 seconds
or
2. Crank 4-6 times
the first time i ever did a compression test on my motor was with the one crank and hold for 4-6 seconds NOT WOT which yield 125psi on all four cyclinders. i thought this was weird because that is super low compression for a jdm gsr motor because my car ran fine. this was about five weeks ago.
yesterday i did another compression test but this time with process #2...i crank the motor 4-6 times WOT and yield 248-251 on all four cyclinders. this i thought was kind of high.
conclusion: which is the RIGHT way of doing it?
Thread Starter
Junior Member
Joined: May 2005
Posts: 305
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From: Madison, Wi, Country
Re: Compression Test: One Crank Hold or 4-6 Cranks ?? (Dogginator)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator »</TD></TR><TR><TD CLASS="quote">Crank until the pressure stabilizes. Tpically 4-5 cranks will do it.</TD></TR></TABLE>
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.
Re: Compression Test: One Crank Hold or 4-6 Cranks ?? (MRturbo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MRturbo »</TD></TR><TR><TD CLASS="quote">
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.</TD></TR></TABLE>
hold it for 4-6 cranks
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.</TD></TR></TABLE>
hold it for 4-6 cranks
Daisy... Daisy...
Joined: Jun 2004
Posts: 16,580
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From: 24601
Re: Compression Test: One Crank Hold or 4-6 Cranks ?? (MRturbo)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MRturbo »</TD></TR><TR><TD CLASS="quote">
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.</TD></TR></TABLE>
No. The compression gauge will retain the maximum pressure. You have to release it after recording the reading.
what we were arguing about was is there a difference between HOLDING the crank and cranking it multiple times.</TD></TR></TABLE>
No. The compression gauge will retain the maximum pressure. You have to release it after recording the reading.
Honda-Tech Member
Joined: Apr 2007
Posts: 1,292
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From: North Jersey
Re: Compression Test: One Crank Hold or 4-6 Cranks ?? (MRturbo)
First remove all your spark plugs....disable your fuel system and disable your ignition..then start at cyl number 1 and crank engine 7 times at W.O.T then youll get your reading
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305, check, compression, compresssion, crank, cranks, cyclinder, cylinder, differences, honda, number, oc, ten, test, tests
