1963 Dart Slant 6 oil pressure sender

[Anton Delange]

Broke the oil pressure sender that screws directly in block ( oil channel) One year only(1963) design, where can In get one? NAPA, AUTOZONE, Advance etc., all have units for 64 and up. Thanks

 

[townsend]

Chrysler parts catalog shows the oil pressure sending unit part number for 1962 and 1963 six cylinder is 2256800 which Chrysler superseded to 3004105.
Both numbers can be seen on eBay.

 

[Anton Delange]

Thanks for your help.
Also looking for a two (2) speed wiper motor.
1963 id a one year only ( seems most parts are ) and so far striking out at all typival part places .
Any suggestions

 

[slantsixdan]

Broke the oil pressure sender that screws directly in block ( oil channel) One year only(1963) design, where can In get one? NAPA, AUTOZONE, Advance etc., all have units for 64 and up. Thanks

It's not one-year-only, no. It's '60-'63, but the wall between the '63-down and '64-up type switch is low and easy to cross if you can't get hold of an original type.

The two differences are thread size and terminal type. The early senders have a flat, round hat-shaped post, which the wire terminal slides onto transversely (side to side). The later senders have a thin threaded post, which the wire terminal pushes onto axially (top to bottom). Changing the terminal on the end of the wire is easy.

1/4"-18 NPTF (Dryseal) is the smaller thread size. 3/8"-18 NPTF (Dryseal) is the larger thread. All Slant-6 oil pumps are tapped for 3/8"-18 NPTF. For whatever reason, early cars had a reducer bushing screwed into the pump, and a small-thread sender screwed into the bushing—I can only guess Chrysler had a warehouse full of small-thread senders (which they had started using in '54 or so) and wanted to use them up, or perhaps it was a result of Chrysler's shady supplier-kickback scheme of that time. Other than the thread size difference, the senders are the same, so the bushing setup does nothing but introduce another potential leak point. You can just unscrew the reducer bushing and install the large-thread sender directly in the oil pump.

Large-thread sender with early-type terminal: Echlin OP-6451 or Standard PS-16. RockAuto has the PS-16 for $11 before discount.

While you're at it, it will also be a good idea to service the oil pressure relief valve to make sure it's doing its job, as described in these two threads: thread 1, thread 2.

 

[Anton Delange]

Thank you very much, excellent explanation.
I had my car resprayed and in the wiper removal act they managed to damage the wiper motor gear train, now makes bad gear noise. Went to Mopar at Carlise and found a used one that is silent and seems to run well. Should any pre install actions be taken. I installed underdash AC so access is via glove compartment .
Thanks for your help