filter connection to the crankcase
As a new V8 owner, Robert Rose sought
help in clarifying where the lower section of the rubber pipe from the breather
filter, located in that tight space between the back of the carburettor airbox
and the bulkhead, connects to the crankcase below.
Mike Macartney provided a photo of a V8 during a rebuild
which shows the location - it exits the crankcase valley at the back of the engine
on the righthand side. It's highlighted in the photo alongside. Alan Rennie clarified
the part numbers of the filter too. See photos
of the connection point.
does the crankcase ventilation system work on an MGBGTV8?|
This topic came
up in a V8BB thread in September 2014 when Geoff King provided a concise explanation
saying "the MGBGTV8 has a positive crankcase ventilation system; clean air
is drawn into the rear of the crankcase through a small breather filter
located behind the carburettor airbox and contaminated air in the crankcase is
sucked out through the flame traps on each rocker cover and routed to the
carburettors where it enters the engine and is burnt. Fumes should NOT be expelled
from the rear of the crankcase especially at idle when (downstream of the throttle
disc) the engine develops the greatest suction".
Geoff added "later versions of the Rover V8 engine,
as fitted to the RV8 for instance, have a similar system. Clean air is drawn into
the crankcase via a small filter at the rear of the left rocker cover; contaminated
air is sucked out through a single flame trap at the front of the right rocker
cover and is routed to the plenum chamber where it enters the engine to be burnt.
Note this contaminated air enters the engine after the airflow meter so if the
flow is too high the mixture will be weak because the electronics have already
calculated how long the injectors are open based on the flow of air through the
airflow meter. The flow of air is controlled by having a small hole in the rocker
cover filter to restrict the flow".
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