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copper blake lines, Spit idle/smoke

To: british-cars@autox.team.net (British-Cars)
Subject: copper blake lines, Spit idle/smoke
From: "Randell Jesup" <jesup@scala.scala.com>
Date: Mon, 30 Jan 95 13:36:10 EST
>I have double walled copper pipes in the AH3000.
>They fit easily, but you must fasten them down at several spots to
>avoid vibration and fatigue.(of the pipes Ray !) The danger, perhaps,
>is that they would also dent more easily, be cut more easily and so
>may be illegal for this reason alone. 

        BTW, my understanding is that copper pipes are actually a copper-
nickel alloy, to avoid (or at least reduce) fatigue problems.  I've also
heard of steel lines with some sort of internal and external plating to
avoid corrosion (for some reason copper-steel-nickel comes to mind).

Thomas Story writes:
>New question, it's idling at probably between
>1500 and 2000 rpm, I'm sure(yeah right) it has something to do with the
>mixture(too rich)...anyways, I tried adjusting the idle screw all the way
>down, and there's also a deceleration by-pass valve that's on this carb,
>but the vacuum line is plugged, should that affect anything.

        It could be the bypass valve.  Instructions on how to adjust them
(even if non-adjustable) have been posted here before.  If the carb hasn't
been rebuilt recently, this could cause problems (split diaphragm, etc).
There's a strong chance of somewhat worn throttle shafts leading to leaks
and mixture/idle problems.  Try the spray-carb-cleaner trick to check for
vacuum leaks.

> It's smoking
>abit(white)which would lead me to believe that the mixture is off, so what

        White?  That would normally indicate that you're burning antifreeze
(i.e. head gasket leak or head crack).  Unless my memory is failing, which
is of course possible.  You might want to retorque the head for safety and
hope it goes away.  Blue-ish is normally oil burning, and black is over-rich.
-- 
Randell Jesup, Scala US R&D
Randell.Jesup@scala.com
Ex-Commodore-Amiga Engineer, class of '94
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