In a message dated 7/30/99 7:37:10 PM Pacific Daylight Time,
cupola2@worldnet.att.net writes:
<< Dear Group,
Took my '54 3100 in for a compression and leak
down test today, but I'm unsure what it all
means. Here are the fugures they gave me.
Comprssion/PSI Leak Down % Hot 8K
#1 130 40% rings
#2 125 50% rings
#3 105 50% valves
#4 85 70% equally
#5 120 15% valves
#6 125 20% equally
Of course, they would have liked to have kept my
truck. There is no smoke coming from the tailpipe
and I'm no using any oil that I can tell.
Sometimes, when I start her, I get a funky, sweet
smell that goes away after a few minutes. Other
than that, I like driving my old truck.
What do all these figures mean?
John 54 3100 235 six
oletrucks is devoted to C >>
I believe the % is the pecentage that the particular leak rate is, if
initially the cylinder hold 100psi, then over the givev time it leaks to
80psi, there would be a 20% leak rate. Spec is 10% I believe.
I also think they are indicating whether the leakage is coming past the
rings, or the valves.
Mike
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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