Re: 1956 Packard Caribbean
Posted by HH56 On 2018/12/30 12:12:01
IF the car is stock there will be two vacuum sources for the wipers. The main one is manifold vacuum in a steel tube from a 90 degree fitting in the port at the rear of the front carb. That tube routes along the right head lower edge and ends with a slight turn up at the rear. A short rubber hose connects the remaining distance to a side port on the balance valve mounted on the firewall. Another steel tube from the aux vacuum pump in the crankcase exits a port about midway on the block on the right side just above the oil pan and goes to the rear of the engine where it kicks up several inches. It also ends in another short hose connecting to another side port on the balance valve. Wiper motor connects to the large end of the balance valve and washer to the small end.
If the car has had the OLDS or PI oil pump conversion there is no longer an aux vacuum pump so any number of things could have been done or eliminated. It will be up to you do determine how or if an aux vacuum source was done and routed. The simplest method is to just add a dual fuel pump and disconnect the steel tubing and plug the hole in the block. Reuse the old aux tubing along with some additional fittings and hose for the vacuum source coming from the new fuel pump but that is not a given. If the wipers were converted to electric then part of the vacuum tubing could have been eliminated or capped off and just the washer is supplied. If there is no aux vacuum source and the balance valve is still installed then the hose from the old aux pump needs to be disconnected and aux port on the valve capped off to avoid the possibility of a vacuum leak.
The port on back of the rear carb is for the power brakes. There is a 45 degree fitting and a check valve which feeds the hose to the brake booster and vacuum reservoir.
Here is the vacuum lines for the wiper and washer. Shown is the standard Left fender washer setup used when there is no electric shift. With exception of the direction the hose routing takes it is the same for the right side mount.
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If the car has had the OLDS or PI oil pump conversion there is no longer an aux vacuum pump so any number of things could have been done or eliminated. It will be up to you do determine how or if an aux vacuum source was done and routed. The simplest method is to just add a dual fuel pump and disconnect the steel tubing and plug the hole in the block. Reuse the old aux tubing along with some additional fittings and hose for the vacuum source coming from the new fuel pump but that is not a given. If the wipers were converted to electric then part of the vacuum tubing could have been eliminated or capped off and just the washer is supplied. If there is no aux vacuum source and the balance valve is still installed then the hose from the old aux pump needs to be disconnected and aux port on the valve capped off to avoid the possibility of a vacuum leak.
The port on back of the rear carb is for the power brakes. There is a 45 degree fitting and a check valve which feeds the hose to the brake booster and vacuum reservoir.
Here is the vacuum lines for the wiper and washer. Shown is the standard Left fender washer setup used when there is no electric shift. With exception of the direction the hose routing takes it is the same for the right side mount.
Attach file:
(53.22 KB)
(148.58 KB)
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