It could be worn linkage too. Easy enough to check.

There have been some posts here cautioning not to use distilled water as it can leach some metals in the cooling system. I have use de-mineralized water which is available in most super markets. We used to call it "ironing water" as it was used in steam irons. It did not leave mineral deposits which would clog the iron's steam ports. Of course, no one irons clothes anymore.

I only have some shots of my 37, so it is only a reference as I am sure that the 38/39 are different.
Bob J.

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There is a mechanical interface with the cam shaft. The 1st large lobe on the cam runs the arm that actuates the lever that runs the diaphragm. What may of happened is that there may have been enough wear on the arm or cam lobe that there is now a spot in the cycle where the cam and arm no longer touch, then a tap sound occurs when the lobe comes back in contact with the arm of the pump.
On mine my rebuilder built up the arm's cam follower pad with weld and refaced it, that may be required on yours. Just about all cam shafts have wear on the fuel pump lobe so I suspect that any wear that there will be on that lobe is still okay, which is proven by the fact your pump works so there is sufficient 'throw' to pump the fuel. Like it has been pointed out on other threads, the pump delivers far more fuel than necessary anyway.
Bob J.

This is as close as I can come - a 1937 junior top.

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Have a 48 Packard Deluxe with 288 engine. When running get a constant tap like a valve needs adjusting. That said went in and adjusted the valves to spec but still get that annoying tapping sound. Used a stethoscope and not hearing any particular noise valve but when put by the fuel pump it’s tapping is in sink with engine tap. So questions are… am I heading in the right direction and when mechanical pumps start to wear do they start tapping loudly?

Kev,
Yes, the excitement builds.... the 2 week weather forecast looks favourable for Hershey and hopefully anyone flying can make their connections without delays or cancellations etc. Look forward to meeting the Packard folks and seeing it all. I printed the maps you posted and we should be able to 'navigate' the show. Major bucket list item!! Chris.

I would like to order battery cables for this car but have not found a good source for the 0 or 00 gauge that can make the braided one with the proper flat end. Any ideas?

Also, does anyone know the lengths? My notes show 20" long for the braided positive cable and 40" long for the negative but these seem rather long to me.

Update: I found another note that says that the cable in my 1954 Patrician is a Delco-Packard 1E-41 which likely indicates that it is 41" long. However, the senior 1954 Packards have a larger solenoid post than found on the earlier cars so does anyone have a Delco-Packard chart? I located a 1U-41 but not sure of the solenoid connector size or whether it's for the negative post or not.

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Marty, am not quite sure which diagram you are looking for but here is one on windows I posted not too long ago. If this is not the one you are thinking of will need a bit more information to find it.

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This time next week I'll be in route to Hershey. We plan on making a stop outside of Dayton, OH to see Patrick Aldridge at his shop.

The High Holy Days of Hershey are soon upon us!