Le 25/01/2017 05:13, djaflyact a crit :
> The cockpit readings at idle lowered from 20 to 5 on the ground.
David,
The direct correlation between ball joint tightness and cockpit CO
readings seems to indicate the problem may lie with your firewall.
Of course your exhaust line should be reasonably tight, but it is
impossible to avoid fumes in an engine compartment.
The firewall is there to prevent flames and engine gases from getting
into the cockpit. The firewall should be perfectly gas tight.
*Any* aperture or pass-through in the firewall should be suitably sealed
with fire resistant grommets, putty, bellows, tape, etc.
Not the tiniest hole, slit, crack should be tolerated.
Some info here (only in French I'm afraid ;-)
http://contrails.free.fr/engine_cpf.php
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr
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