<VV> Re: Leakdown Test

[UltraMonzaWest@aol.com]

In a message dated 4/6/2004 10:03:52 AM Pacific Daylight Time, 
chapmanmd@charter.net writes:
Not to be disrespectful Matt, but there is a different theory regarding 
leakdown tests... ESPECIALLY for low compression engines. SNIPPED.

Everyone remembers how to do a compression test: screw in the tester, flip 
the kill switch to "off", hold the throttle wide open, and press the starter 
button. The cylinder takes in air and compresses it, and the tester traps it. The 
maximum is reached when the gauge holds more pressure than the engine can 
produce. The weakness of this test is that throttle postion, engine temperature, 
ambient air temperature, and a host of other factors can make the results vary 
considerably. What's worse, a compression test checks too many engine 
components at the same time. A poor reading can indicate so many things, it's hard to 
tell which engine part is at fault without doing a lot of other tests.
SNIPPED

Mark Chapman
Group Red 66 Monza and too many other cars, motorcycles, and junk to keep up 
with.


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Respect?? for Moi???  gg   Only Hankie "respects" me...everyone else 
"suspects" me!! LOL!!

We both agree   Especially for LOW comp.  engines...  but  you've overlooked 
the "plus's"!


Irregardless of all those factors....one person doing it at the same 
times....get the same "Relative"  readings....a low cylinder is a low cylinder....

Other tests.........  squirt oil in .. retest.....pressure UP??    rings, 
cylinder / piston....I'll pull it apart and I'll have it back on the road before 
you get setup for "leakdown! gggg

Maybe that's why I have 5  "turnkey" Vair  vehicles....

remember "KISS"   ggggg

NOTE:   no previous chairman was hurt by the composition of this e-mail.