It was a cold engine....From what I can tell It's crankcase noise, telling
me it's ring leakage. The reason I'm doing it is because I broke a Rocker
Arm when the timing belt came off (it was idling thank god). It was the #1
Exhaust rocker, but #4 Cylinder has the big number. When I have the Rockers
off to replace the busted one, I'm also checking for bent valves with the
old rope down the plug hole trick. I'm trying to avoid taking off the head
(yeah, lazy)
This is my first experience with leakdown testing. Thanks for the
guidance...
Mike M.
-----Original Message-----
From: owner-land-speed@autox.team.net
[mailto:owner-land-speed@autox.team.net] On Behalf Of Flowbench@aol.com
Sent: Thursday, July 27, 2006 1:29 PM
To: mike.meierle@alcatel.com; land-speed@autox.team.net
Subject: Re: Leakdown question
Mike, it kinda depends on what's leaking (or not). Did you do this on a warm
or cold engine? is it leaking out the exhaust, intake or breathers? If you
are running a standard performance ring package 3% to 6% is pretty good to
me (endurance racing), but if the engine is cold or hasn't been run in some
time it could just be light surface rust on the valve or seat. In my engines
I don't worry until it gets over 15%, but again it depends on if it's a warm
or cold engine. I'll bet if you warm the engine the percentages will be
closer. Me I'd run it!!
Mike
|