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John S

Temp guage sender thread

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I want to use the old original mechanical temp guage  in my 41 Plymouth.

The sender is to big for the hole in the intake and i need to drill/thread a new one, so my question is if anyone know what thread the original temp sender has?

 

 

Plyma 41.jpg

Edited by John S

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the sender unit (fixed bourdon tube) should be mounted on the driver's side of the head, about 3/4 or so from the front of the engine....if so equipped with oil filter, it will be adjacent to the filter lid...there is no sender in the intake....

Edited by Plymouthy Adams

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46 minutes ago, Plymouthy Adams said:

the sender unit (fixed bourdon tube) should be mounted on the driver's side of the head, about 3/4 or so from the front of the engine....if so equipped with oil filter, it will be adjacent to the filter lid...there is no sender in the intake....

 

I dont have the original Engine (318 LA).

 

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now the real important facts are being told...lol  if I recall, the thread of the sender of the 318 are 3/8 inch pipe....in the case of you using the original bourdon tube gauge, I do not think it will be long enough to reach the position on the 318.   Most all the aftermarket gauges use a smaller bourdon tube with multiple adapters for the water jacket and a jamb nut on the bourdon tube to fix and seal the sender to the adapter...

 

To add length to the original sender would require a splice and that is a special doable procedure...but again, the tube may not be as large, your splice bush will have to account for this irregularity at time of upgrade.  I do not recall any really suitable place for a rear water port on the intake...

 

 

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