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May 31, 2005
G'day Jeremy
Your car probably had a PVC (Positive Crankcase Ventillation) valve on the inlet manifold, connected via a rubber hose to the engine breather. When you had your foot off the throttle, the partial vacuum in the inlet manifold helped to reduce the pressure in the sump, thus (in theory if seldom in practice) minimising oil leaks out of the rear main bearing.
This PCV valve was later deleted, and the hose from the engine breather went to a plastic Y-piece and then via two short rubber tubes to these pipes on the carbies.
You have two options. It is best that the carbies be attached to the engine breather via a T-piece of Y-piece. Then the inlet vacuum will help draw pressure from the sump as was intended. If that's not possible, block them both off. Do not join them together without a pipe leading to the breather, as the vacuum in one carby upsets the piston in the other carby.
Hope that helps, and avagoodday
Colin
"Colin Dodds" < colin@... > 37332
Posted on May 31, 2005 07:23 AM
Posted to category(s) Braking System | Carburetor | Cooling System | Cylinder Head | Electrical System | Engine (external) | Engine (internal) | Exhaust System | Gauges | Intake System | Lubrication System | Miscellaneous | Technical Info | Tuning
