The later 18V should have a pipe or pipes from the carbs to the oil
separator/flame trap on the front tappet cover and this applies a constant
level of suction to the crankcase when the engine is running. Non-emissions
cars then had a vented, filtered and restricted oil filler cap to let a
limited amount of filtered air into the system and so provide through-flow
ventilation. Emissions cars had a non-vented cap and a restricted vent on
the rear of the rocker cover that was piped to the charcoal canister and
thence to the open air. If there is no port on the carb to suck in this
pipe then you could route it to the air cleaner, so at least it will consume
the vapours, but that will not ventilate the crankcase and you are likely to
get condensation and corrosion particular in colder weather. Very early
cars had the rocker cover piped to the air cleaner and an open tube on the
tappet chest down by the bottom of the engine, often referred to as a draft
tube. Opinion differs as to which way fumes travelled under various
conditions, but again it didn't provide positive ventilation.
Does the light glow at normal brightness with just the ignition on and dim
right down when you turn to start? If so it sounds like a bad connection
somewhere, possibly at the batteries or where the ground strap bolts to the
body, or where the brown join the battery cable at the solenoid. If it's
dimmer than normal with just the ignition on what happens when you turn the
lights on? If no change then it sounds like the switch or its connections,
if it dims right down then main connections as described before.
PaulH.
----- Original Message -----
From: "Bill Snyder" <wtsnyder@juno.com>
To: <mgs@autox.team.net>
Sent: Tuesday, November 04, 2003 1:54 PM
Subject: Exhaust Hoses
> Hello list. I have a '72 BGT with a later 18V engine circa 1979. The ZS
> Carbs have been replaced with Mikuni carbs (similar to Webers). On the
> front left side of the engine block is a cover/oil separator with a hose
> attachment. I believe the opposite end of this hose originally fed back
> to the carbs. My hose goes from the cover back across the valve cover and
> just stops at an open end. The problem is that after the engine is warm a
> nasty smelling smoke comes from the hose that filters through the
> firewall into the cockpit. Where should I route this hose? Or is it okay
> to cap it?
>
> Second problem: Usually when starting this car, I turn on the ignition
> and the ignition light shines brightly. I turn the ignition key further
> and the engine cranks. Occasionally, when the ignition is turned, the
> ignition light glows at < half strength and the engine will not turn
> over. The battery is fully charged. Is this a fault in the ignition
> switch itself, or where should I start looking?
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