Oil sending unit 69 charger ....tech needed
#1297806
09/05/12 03:11 AM
09/05/12 03:11 AM
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Joined: Feb 2005
Posts: 116 long island
autodynamics
OP
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OP
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Joined: Feb 2005
Posts: 116
long island
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When I first put together my motor I had gone to the local parts store and bought a new oil sending unit, the gauge showed 60-80 lbs running, Sometime later the sending unit took a dump, the connector on the bell was loose so I replaced it, since then I have changed it 6x only for the gauge to read 20-40lbs The sending units look identical and no part # On them , I believe they made a few different models with different ohms Resistance ,
It's a ralley cluster and I'm using a ps-59 standard sending unit I have tried a Oem one as well with same low psi results Thanks in advance Pete
Last edited by autodynamics; 09/05/12 03:13 AM.
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Re: Oil sending unit 69 charger ....tech needed
[Re: autodynamics]
#1297808
09/05/12 03:53 AM
09/05/12 03:53 AM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Post a picture of the sender your using... BTW the OE manufacturer was Introl....
Have you tried installing a mechanical gauge temporarily to check the oil pressure?
Might try contacting member JoeSixpack to see if he's got a quality vintage sender..
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Oil sending unit 69 charger ....tech needed
[Re: 1_WILD_RT]
#1297810
09/05/12 07:23 AM
09/05/12 07:23 AM
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Joined: Jan 2007
Posts: 531 Charlotte, NC
Kowal
mopar
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mopar
Joined: Jan 2007
Posts: 531
Charlotte, NC
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I just hooked up a mechanical gage on my Hemi, worried about the low oil pressure I thought I had on a break in motor. The Hemi is fine.
The difference from the mechanical gage and the electric was stunning. I changed sending units and they still don't agree, but the new one was closer.
I will probably take off the mechanical gage but only after I have a mental fix on the correlation. For the electrical stock gage, no oil pressure would be a right reading. Low might be low. High is high. That seems to be the accuracy.
'69 Hemi Charger 500, ‘70 U code Challenger R/T (These and a bunch others at www.dkowal426.com) P.J. O'Rouke: "The old car ran perfectly, right up until it didn't."
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Re: Oil sending unit 69 charger ....tech needed
[Re: autodynamics]
#1297812
09/05/12 07:19 PM
09/05/12 07:19 PM
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Joined: Jan 2008
Posts: 3,886 Lost and Spaced
bboogieart
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Lost and Spaced
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I can't say for sure, but I see no reason for more than one type, as they all measure the same thing in the same manner. The dashes all work in the same ohms don't they? Did you try a mechanical gauge?
I have mechanical Aptitude. I can screw up anything.
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Re: Oil sending unit 69 charger ....tech needed
[Re: autodynamics]
#1297814
09/05/12 10:11 PM
09/05/12 10:11 PM
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Joined: Jan 2003
Posts: 5,447 So Cal
Sinitro
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Posts: 5,447
So Cal
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Quote:
When I first put together my motor I had gone to the local parts store and bought a new oil sending unit, the gauge showed 60-80 lbs running, Sometime later the sending unit took a dump, the connector on the bell was loose so I replaced it, since then I have changed it 6x only for the gauge to read 20-40lbs The sending units look identical and no part # On them , I believe they made a few different models with different ohms Resistance ,
It's a ralley cluster and I'm using a ps-59 standard sending unit I have tried a Oem one as well with same low psi results Thanks in advance Pete
Here is link for an original OE type, made in the USA not China or Mexico.... From Rich Ehrenberg...
http://www.ebay.com/itm/Mopar-Oil-Pressu...-/221119969388? pt=Vintage_Car_Truck_Parts_Accessories&hash=item337bc6f86c&vxp=mtr
Note that there are differences because inside the sensor is a variable resistor which has a % tolerance..
Just my $0.02..
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Re: Oil sending unit 69 charger ....tech needed
[Re: moparjo68]
#1297816
09/06/12 02:02 AM
09/06/12 02:02 AM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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I just clicked on the link & I have a concern with the unit, probably a good sender but I'd strip the teflon tape off the threads, the sender is a variable resistor so the teflon tape prevents a good connection to ground so it would cause a low reading.... I've never used sealer on the oil sender or the temp sender for this very reason & I've never had a leak from either....
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Oil sending unit 69 charger ....tech needed
[Re: 1_WILD_RT]
#1297818
09/06/12 10:19 PM
09/06/12 10:19 PM
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Joined: Jan 2003
Posts: 5,447 So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,447
So Cal
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Quote:
I just clicked on the link & I have a concern with the unit, probably a good sender but I'd strip the teflon tape off the threads, the sender is a variable resistor so the teflon tape prevents a good connection to ground so it would cause a low reading.... I've never used sealer on the oil sender or the temp sender for this very reason & I've never had a leak from either....
Keep in mind.. That the NPT is tapered so as the sensor is torqued down any teflon sealing tape will be worn down so the end tip of the sensor is down to metal-to-metal in its deepest penetration..
Also note that the mentioned sensor is made by the original factory that produced the Chrysler OE part... IMHO.. I don't like any brand after-market sensors as they can be all over the map for electrical tolerances possibly leading to errors for its readings. I prefer to stay with the OE versions whenever possible..
Just my $0.02..
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