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The
Positive Crankcase Breather Valve
This is the tubing and one-way valve
assembly that allows fumes that may build up in the crankcase as the oil is being sloshed
about, to escape. In some cars, the tubing feeds straight back into the air filter
housing, but on the Capri, the tube is fed into the inlet manifold. So in effect, the
engine re-consumes its own fumes. The tube is found behind the distributor and under the
carburettor. Use a torch to see it as it is a bit dark down there. The valve is fixed in a
hole on the top of the crankcase. If you pull it, you will find that it lifts away from
the engine. The other end of the tube is fixed with spring clip. Once removed, give the
valve a good wash in turpentine as it is often clogged up with sticky oil deposits. When
cleaned, if you shake it, you should hear the valve rattling. If not, I suggest getting a
replacement as this simple thing can make your car 'hesitate'.
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