Re: Stewart's 1955 Packard 400
Posted by HH56 On 2024/3/14 18:57:35
No drawing I am aware of except a bit in parts book of WS wiper motor and washer but someone might be able to come up with photos of the engine. If not, on the carb there is a port on the side which connects to the small steel tube going to distributor advance can. On the rear of carb is another port where one of the ports of a brass block or a tee is connected. Second port of tee connects to a 1/4 steel tube which heads toward the right head and then bends back toward rear of engine where it kicks up an inch or two near the firewall. It is clamped to the head at the rear. The open end of the tube connects to a short rubber hose going to one of the side ports on the wiper balance valve. The other port on the block or tee connects to a check valve and then the 3/8 hose going to the brake booster.
If the stock crankcase vacuum pump is still installed, on the right side of the engine about in the middle and just above the oil pan is a port where an elbow is threaded in. That connects to a short length of 1/4 steel tubing. A few inches away from the elbow toward the rear is a check valve. The other side of the check valve connects to another section of 1/4 tubing which continues to the rear where the tube again kicks up a few inches near the firewall. Another piece of rubber tube connects to the second port on the side of the balance valve. If the engine has the Olds or PI pump mod that eliminates the aux vacuum pump the 1/4 line is disconnected and block port is plugged. Make sure the now unused port or tube on the balance valve is also plugged unless you are replacing the crankcase pump with something else and visually want to use the abandoned line to keep the vacuum supply more or less original looking.
Attach file:
balance valve.jpg (156.47 KB)
If the stock crankcase vacuum pump is still installed, on the right side of the engine about in the middle and just above the oil pan is a port where an elbow is threaded in. That connects to a short length of 1/4 steel tubing. A few inches away from the elbow toward the rear is a check valve. The other side of the check valve connects to another section of 1/4 tubing which continues to the rear where the tube again kicks up a few inches near the firewall. Another piece of rubber tube connects to the second port on the side of the balance valve. If the engine has the Olds or PI pump mod that eliminates the aux vacuum pump the 1/4 line is disconnected and block port is plugged. Make sure the now unused port or tube on the balance valve is also plugged unless you are replacing the crankcase pump with something else and visually want to use the abandoned line to keep the vacuum supply more or less original looking.
Attach file:
balance valve.jpg (156.47 KB)
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=268800