----- Original Message -----
Sent: Tuesday, January 06, 2004 5:50
PM
Subject: [FlyRotary] evap core air
pockets?
Greetings,
In thinking about my evap
core installation, I realized that there would be a potential problem with air
getting trapped in the top of the cores. Since the hoses are all on the
bottom, it just seems like there's always going to be some air trapped at the
top, unless I find some way to bleed it out.
Ed, I just looked at your
pics again, and don't see any provision to remove air from the top of your
cores. Is this not really a problem?
Thanks,
Rusty (really leaving
now)
Well, yes and
no. You are correct when initially filling after a drain, you will find
that approx 1/4 -1/3 of the upper core is filled with air. A peacock
would of course release the air, but I never installed any.
However, I have a proceedure that works and since I don't drain the coolant
but once a year (intentionally that is), here is the proceedure I
use.
Fill up the system
with as much coolant as it will hold (this will leave air trapped as I
mentioned - but not to dispare) - fire up the engine and let idle with
the radiator cap off. Let it run for 1 to
1 1/2 minutes, then shut it down. You will find that the
system will now take more coolant. Do this a couple or three times never
running it for over tw0 minutes at a time and refilling the system each
time.
Then put the
radiator cap on and fire up the engine again. This time run it up to max
rpm for apporx 30 seconds and then shut it down. You should find your
header tank again low on coolant. A couple of more runs up to max static
held for not more than 30 seconds and refilling will remove the air in the
cores.
First time you run
it up and after shutting it down hold your hand on the side tank of a
core. You can tell where the coolant level it very easily. It will
be much cooler immediately above the water level in the core and much
warmer/hotter where the coolant is in the core. So you can monitor your
progress in removing air by feeling the side tank for the temp differential
line.
Note: DO NOT PLACE
RELIANCE ON YOUR COOLANT TEMP SENSOR while doing this. It will not
register the correct temperature unless it is in steady contact with the
coolant which it won't be until you get most of the air out. So don't
be lulled into letting the engine run longer than I suggested just
because the temperature gage says everything is OK.
Hope this
helps.
Ed
Anderson