What are good compression numbers for sohc.....heres mine.
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What are good compression numbers for sohc.....heres mine.
as the topic says... i got 190-195 all across. now from what i read i should be around 240-250 is that correct for this engine... and if so why my numbers so low?
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Re: What are good compression numbers for sohc.....heres mine. (DjFreeze)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DjFreeze »</TD></TR><TR><TD CLASS="quote">... why my numbers so low?</TD></TR></TABLE>1) Was the engine hot when you checked it?
2) Did you remove all spark plugs or only 1 at a time?
3) Is your battery or starter weak? (cranking rpm influences reading)
4) Did you disable fuel injection?
5) Did you keep cranking until the reading doesn't increase any more?
6) Does your gauge have a long hose or a large internal volume?
7) Throttle wide open?
Modified by JimBlake at 4:26 PM 5/5/2004
2) Did you remove all spark plugs or only 1 at a time?
3) Is your battery or starter weak? (cranking rpm influences reading)
4) Did you disable fuel injection?
5) Did you keep cranking until the reading doesn't increase any more?
6) Does your gauge have a long hose or a large internal volume?
7) Throttle wide open?
Modified by JimBlake at 4:26 PM 5/5/2004
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Re: What are good compression numbers for sohc.....heres mine. (TIRENECK)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TIRENECK »</TD></TR><TR><TD CLASS="quote">whats the proper way to do compression test?</TD></TR></TABLE>Engine hot, spark & fuel disabled, throttle wide open, crank as many revs as it takes until the pressure stops climbing.
Anything that influences cranking rpm just has to be CONSTANT. So if you want to take out only 1 spark plug, OK. But then DON'T test cyl-1 with 1 plug out, cyl-2 with 2 plugs out, etc... If your battery/starter gets slower & slower as you move from one cylinder to the next that's not good.
So.... # 2, 3, & 6 don't have a right or wrong answer. They just have to be the same otherwise you can't compare the actual pressures with each other.
Anything that influences cranking rpm just has to be CONSTANT. So if you want to take out only 1 spark plug, OK. But then DON'T test cyl-1 with 1 plug out, cyl-2 with 2 plugs out, etc... If your battery/starter gets slower & slower as you move from one cylinder to the next that's not good.
So.... # 2, 3, & 6 don't have a right or wrong answer. They just have to be the same otherwise you can't compare the actual pressures with each other.
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Re: What are good compression numbers for sohc.....heres mine. (DjFreeze)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DjFreeze »</TD></TR><TR><TD CLASS="quote">as the topic says... i got 190-195 all across. now from what i read i should be around 240-250 is that correct for this engine... and if so why my numbers so low?</TD></TR></TABLE>
190-195psi all the way across sounds good for a single cam. After all, these motors don't have alot of compression. 240-250psi would be for a DOHC VTEC.
190-195psi all the way across sounds good for a single cam. After all, these motors don't have alot of compression. 240-250psi would be for a DOHC VTEC.
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From: Brooklin, on, Canada
Re: What are good compression numbers for sohc.....heres mine. (DjFreeze)
NEVER BUY FOR THIS GUY VERY VERY VERY VERY VERY VERY BAD SELLER!!!!
anyone live in the new jersey area, want to go beat his ***??
anyone live in the new jersey area, want to go beat his ***??
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