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Jdc03
Dodge Dakota
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8/15/2003
12:52:00
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 Subject: '92 Oil Pressure problem
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Ok, here's the deal ...
Two days ago my upper heater core hose blew.
This caused anti-freeze to spew onto any and everything on the passenger side of the engine.
The hose has been replaced and is all set, but since that happened I've been haveing weird oil pressure problems.
The gauge drops to nothing from time to time and the overall pressure seems to be a lot lower than it used it, staying very close to the low end of the 'normal' area.
At first I thought that maybe the sender or something get wet and is giving false readings, but now that everything has had time to dry and it's still giving those readings I'm starting to worry.
Now here are the questions ...
Is that the computer on the passenger side ?
If it is, could it getting wet be causing these problems ?
Could my sender be giving false readings ?
Should I replace it ?
Could my oil pump or pick up be in need of replacing ?
Could doing an oil change help the situation ?
Other info ...
1992 3.9 Magnum with about 173,350 miles.
Last oil change was less than 1,000 miles (10-30, Fram filter)
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mhall02
Dodge Dakota
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8/15/2003
13:14:35
|  RE: '92 Oil Pressure problem
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I just replaced the oil pressure sending unit in my '91 last week, it read low pressure (most of the time) since I bought in five months ago and now it reads great pressure, up to 3/4 of the way in the 'normal range'. Only $30 so I thought it was worth a shot, and easy to replace (10 mins or less). From what I understand its not to unusual for these to go bad on our Gen IIs.
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Jdc03
Dodge Dakota
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8/15/2003
14:22:45
|  RE: '92 Oil Pressure problem
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That brings on another question ...
I've been looking through my Haynes book and I can't seem to find where, exactly, the sender is.
I've read other posts and they say it's on the back of the block close to the firewall directly behind your distributor and should have a plug on top with a few wires coming out of it.
When I looked I thought I found it, but thinking back to changing the sender on my brother's Mustang I remembered his looked kinda like an over-sized toy top.
The one on my engine I thought was it didn't look like it.
Does it sound like I found it or should I keep looking ?
Or should I just go buy a new one to see what it looks like and search from there ?
Also ...
Yes, there is plenty of oil in the pan, so that's not the cause of the low oil pressure.
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1flamed92dak
GenII
8/16/2003
21:48:37
| RE: '92 Oil Pressure problem
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Its located behind the distrubutor its pretty easy to get at. I got a Autometer gauge and the stock gauge and I read about 60psi in the morning at idle and after Driving for a few hours it hits about 37 psi so the motor is still within tolerances 107000 and still chugging away
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Pete V.D.V.
Dodge Dakota
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9/14/2003
14:38:51
| RE: '92 Oil Pressure problem
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Have a smiliar problem on 98 Dodge Ram 3.9. During driving oil pressure drops to 0 and you could hear the lifters tapping so I parked it. Replaced the sending unit and oil. Worked well for a couple of days and now I am having the same problem again. Going to drop the pan and replace the oil pump. In other forums I have read there is a problem with oil pump intake on the Dakotas. There is also a technical service bulletin for a software upgrade for the ECM for a similiar problem. On the national highway transportation page many people have described the same problem and lost their engine in the process. If anyone can figure out how to permanently correct the problem let me know. If it is software related I am taking these folks to court.
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Jdc03
Dodge Dakota
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9/14/2003
20:03:23
| RE: '92 Oil Pressure problem
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I lost my engine because of it to, Engine Went BOOM ! thread ...
Have you tried giving it just an oil change ?
It seems the oil filter change fixed mine, for awhile.
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Pete V.D.V.
Dodge Dakota
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9/15/2003
15:41:34
| RE: '92 Oil Pressure problem
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When I replaced the oil pressure sending unit I also changed the oil. I am going to pull the pan off and replace the oil pump later this week. See if that takes care of the problem. There must be something plugging up the screen on the pump. If not, I am stumped.
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Don
Dodge Dakota
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9/15/2003
16:38:13
| RE: '92 Oil Pressure problem
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I have a '92 4x4 with the 3.9L V6.
I get the same fluctutating readings on my oil pressure guage as described at the top of the thread. Middle of normal range on the highway and driving, but sometimes it drops to almost outside the normal range of the guage; normally at stop lights or idle etc...
If you reach a solution, can you post what worked for you? Thanks a lot!
As well, if the temp guage one day only started moving a fraction of an inch even at normal operating temp does that mean that the temp sender unit needs to be replaced?
Don
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Pete V.D.V.
Dodge Dakota
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9/15/2003
23:10:07
| RE: '92 Oil Pressure problem
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Don't know if the temp sender needs to be replaced or not. When I was researching my oil pressure problem I came across people having problems with their temp guage as well. They recommended switching the old thermostat out for a 180 degree thermostat. Don't know if it works or not, but it would be a cheap easy fix to try.
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93Dak
Dodge Dakota
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9/16/2003
15:09:40
| RE: '92 Oil Pressure problem
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On my 93, the oil pressure sending unit is between the egr valve and the distributor cap. It is tall, so you need a very deep 1-1/16 socket. I bought one at Pep Boys for $6. (They have a special socket that is designed for replacing these tall oil sending units.)
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Pete V.D.V.
Dodge Dakota
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9/17/2003
13:39:08
| RE: '92 Oil Pressure problem
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You can also remove the sending unit with a pair of vice grips if you don't want to drop cash on a special socket. In other news, I dropped my oil pan and the oil pump intake screen was clogged solid. There is a cap on the screen that prevents the particulates from dropping back into the oil pan, which would then in turn be removed by routine oil changes. For those who have lost their engine because of this problem, this a potential violation of the implied warranty of merchantability. Dodge has manufactured a vehicle with a part that is sure to fail due to its design. Since I corrected my problem before my engine failed it is not cost effective for me to bring suit. However, I will, and I urge others, to file claims with your state attorney generals office and on the department of highway and transportations national web page.
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Pete V.D.V.
Dodge Dakota
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9/18/2003
00:13:23
| RE: '92 Oil Pressure problem
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Oil pan and pump are on, and my truck is running great. However, the intake screen will probably clog up again over time. In addition to the there being a cap on the intake screen of the pump there is another problem. The inside of the pan has a half inch rise where the oil pan plug screws into. All the heavy solid particulates settle down around this rise in the pan and cannot be removed by routine oil changes. On top of that the intake screen sits right on top of all the crap trapped in the bottom of the pan. I highly recommend changing your intake screen and cleaning your pan if you have any drops in oil pressure. I had 70K on my truck and routinely changed my oil every 3k miles when my oil gauge dropped to zero with little or no warning. Luckily I was close to home when it happened.
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JEA
Dodge Dakota
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10/09/2003
09:15:41
| RE: '92 Oil Pressure problem
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I have almost the same problem, with losing oil pressure.
My 92 (187,000) holds great pressure at idle. But when the engine is cold (right after start), it loses pressure at around 2k rpm. Gauge goes to nothing...could be below where it sits when truck is not running.
when the engine gets to normal running temp, no pressure problems at all...can wail on the gas all I want, and it holds.
Was wondering if it was something with the sending unit, or if that screen thing is clogged?
And, is cleaning that screen hard? I live in an apartment complex who "discourages" automotive work on the property.
thanks for any info you can provide
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shank
GenII
10/09/2003
12:08:45
| RE: '92 Oil Pressure problem
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I have seen and heard of problems with the Copper sleeve that sits in the block on the Oil Pump drive shaft. I can't remember the proper name for it but it's usually called the Oil Drive shaft intermediate bushing or sleeve. It requires you to pull the distributor, Oil Pan, Oil Pump, and the Oil Pump Drive shaft. Then you have to Tap it out with a long chisel.
This was the problem in my Bro-In-Laws '96 Ram V8. Due to using cheap Oil it had bound up inside the shaft which caused the Shaft to bed and when it ran the Oil pump in a circle it disentigrated the gear and ripped up the housing.
It's been about a year but I think we went with the Brass piece and it was around $23, Copper was around $17. Only problem it was a whole day worth of wrench turning to get it out. And anytime you remove the distributor and Shaft you have some Timing issues to deal with. When the shaft is replaced in the teeth are curved to ride against the Cam, You have to have the shaft within +/- 1 tooth in order to be within your 5degree timing window.
Sounds difficult but it's really not. If you plan on making this adventure,
Good Luck.
Shank
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Pete V.D.V.
Dodge Dakota
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10/09/2003
23:51:12
| RE: '92 Oil Pressure problem
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Message:
With 187K I would be willing to bet money the intake screen on the pump is clogged. It will take a little bit of time, but the repair can be done in less than a day. I spent more time searching for parts than actually doing repairs. You will have to go to a Dodge Dealer to get the new screen. It cost me $20 bucks for the screen, which is more than a new pump. I recommend going ahead and replacing the pump and the screen as well do to your mileage. However, before dropping your oil pan, it might not be a bad ideal to try replacing the oil pressure sending unit first. The sending unit costs around $30-$40 bucks. It will cost you a little more if it doesn't work, but it could also save you alot of time and money in the long run if it does.
Good Luck.
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JEA
Dodge Dakota
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10/10/2003
10:38:13
| RE: '92 Oil Pressure problem
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great...thanks for the info. Will post some results when I get them.
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Dominic
Dodge Dakota
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6/12/2016
14:37:56
| RE: '92 Oil Pressure problem
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Message:
Hey everyone I just bought a 92 Dakota I just bought a new oil
pressure sensor had Order it be in on Tuesday I was just
wondering where is it located can't seem to find it
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Kurt Skyles
Dodge Dakota
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1/04/2017
21:02:17
|  RE: 2004 3.7 oil pressure problem
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when I start engine anytime no oil pressure shut it off and start again pressure goes to normal changed oil sending unit made no change at all
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