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Oil pressure sending unit
https://slantsix.org/forum/viewtopic.php?t=45311
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Author:  usdart [ Tue Jun 14, 2011 4:27 pm ]
Post subject:  Oil pressure sending unit

Need the location to install the sender for the idiot light. I looked at the pump area and the only thing there is the cap for the spring.
Anyone have a picture of the possible locations? It looks like a 1/4 MPT acess is needed for the sender.
It is a new engine and the installer did not replace it.

Author:  SlantSixDan [ Tue Jun 14, 2011 5:31 pm ]
Post subject: 

The sender gets threaded into the rear of the oil pump, just aft of and below the filter mounting pad. You will find a threaded port there, with or without a pipe plug in it.

Author:  usdart [ Tue Jun 14, 2011 5:50 pm ]
Post subject:  Sedor unit

Thanks Dan!

There IS a plug there, but, it looks like it is larger than the sendor 1/4 mpt. Or, at lease the head of ot is about a 3/4".

Author:  ceej [ Tue Jun 14, 2011 6:03 pm ]
Post subject: 

The sender should be 3/8" MPT. IIRC.

CJ

Author:  SlantSixDan [ Tue Jun 14, 2011 6:16 pm ]
Post subject: 

There have been at least two different sizes of oil pressure sender threads -- 1/8" NPT and 3/8" NPT -- but the oil pump threads (female) are all the same. Reducer bushings were used in some years to adapt the smaller-thread senders. No idea why Chrysler would needlessly increase parts count like this; all I can imagine is that they got such a screamin' deal on smaller-thread senders that they could add the reducer bushing and still see a savings. More detail here , and remember that the nominal sizes of NPT make them sound a lot smaller than they actually are.

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