<VV> leakdown test

[NicolCS@aol.com]

Good thread. (Is it 14mm?)  I don't have a leakdown tester but I have a good 
substitute.  My compression gauge is the type with an air fitting that fits 
four different lower hoses for different spark-plug thread configurations.  I 
only use the "short" 14mm adapter, leaving the other three unused.  One of the 
other ones is also 14mm and also fits Corvairs.  These adapters have one-way 
valves that permit pressure to go towards the gauge only.  I took the "extra" 
14mm adapter and removed the one-way valve (it's really just a tire valve).  
Now, I can hook-up shop air to the adapter and pressurize the cylinder.  I just 
used it this weekend to identify the reason for no compression on one cylinder 
of my neighbor's Toyota.  It took less than a minute to positively identify a 
leaking exhaust valve.  (the air came out the tailpipe).  If the air had come 
out the crankcase or throttle, that would have identified other failures)

As Martha says: "It's a good thing!"
Craig Nicol
66 Monza 140/4 EFI