What are some causes of oil pressure loss?

JeffZ
10

Asked by JeffZ Mar 21, 2012 at 06:20 PM about the 2001 Dodge Ram Pickup 1500 4 Dr SLT Plus 4WD Extended Cab SB

Question type: Maintenance & Repair

Losing oil pressure but it comes back. Could it be a sensor or is it a bigger problem?

12 Answers

Dan Connell
6,175

does the truck have any ticking or other bad engine related noises? it could be just electrical like the gauge failing. depending on how many miles it has, the oil pump could be going but thats unlikely

11 out of 11 people think this is helpful.
Mike Tritle
2,125

General causes of OP loss would be: Low oil level bad Sender, defective gauge, clogged pump inlet screen, worn bearings, stuck regulator valve in the oil pump, worn out pump, sheared oil pump driveshaft, bad oil filter. Only way to truly determine if oil pressure has dropped is to connect a mechanical gauge to the pressure sensor port and start the engine. God luck!

13 out of 13 people think this is helpful.
Best Answer
JeffZ
10

Thank you for your answers. No there is no ticking or other engine noise. I just did a head gasket replacement and I cleaned everything spotless. You could eat off this engine. Checked oil level I actually think I put in just a little to much. It reads just past the full mark. And there is no obvious leaking under the truck. Thanks again!

1 out of 1 people think this is helpful.
Dan Connell
6,175

It almost always tends to be the gauge in this scenario, as an actual loss of oil pressure for any amount of time when an engine is up to temperature would cause noticable noise almost immediately not to mention damage. id say set aside a couple dollars, and start looking at jegs, and summit for a set of pillar gauges, get a mechanical oil pressure, a transmission temperature and a coolant temp gauge. youll spend a little but its a good insurance policy to see what your fluids are doing

7 out of 7 people think this is helpful.
partyboy
40

What to do with to old gauge in the dash after installing the new one. The old one keeps setting of the dash lights.

4 out of 4 people think this is helpful.
Robert Pedroza Ortiz
290

I have the same problem on my 2002 dodge ram 1500 truck. Also had to do a head gasket job, due to a burst radiator. Right after I had it repaired my oil pressure gauge why idling at a red light would just drop and the check gauges light will turn on. Just stepping on the accelerator would bring gauge back up. Also no engine noises. Returned it back to the mechanic and they replaced the sensor to gauge. But still does it. Is it possible it's a bad gauge, or something related to the head gasket job?? Thanks.

29 out of 29 people think this is helpful.
Larryhagood
120

I have the same issue, after a new engine which then overheated which required another head job my warning lights come on and my oil pressure drops at an idle. I have replaced the oil pressure switch. I am considering replacing the oil pump but I don't know for sure if that will fix it. I was wondering if anyone else with this problem has found a solution.

12 out of 12 people think this is helpful.
Aaronsdodge
110

I had a motor put in my truck and now I'm getting similar actions with my 2005 Ram 1500 V6. The gauge doesn't read until I start the truck the second time . Never any problems before this. Any ideas what happening?

11 out of 11 people think this is helpful.
moslof88
130

I also have an 01 Dodge Ram 1500 4x4 318 engine (5.2 litre) So my oil pressure gauge would out of the blue drop to 0 and sometimes it would come back up n other times if I stopped n restarted then it would come back and other times id have to sit for half hour before starting again then it would come back. The fix. Is sludge is getting pulled up the intake tube I to the tube screen n choking it causing no oil pressure. Had to drop the pan and do a thorough cleaning and flushed the entire system and like greasy magic it worked. Now I had my lifters rattling n knocking when my gauge would go to 0 so I knew it wasn't getting oil. So if my symptoms sound like yours then id check the intake line first cuz this is an inherant problem with these Dodges come to find out.

13 out of 13 people think this is helpful.
02ram3500
70

My '02 3500 will drop its guage to 0 four or five times within a mile. It doesn't matter the engine temp or speed traveling. That beep to check guages is really annoying!

7 out of 7 people think this is helpful.
04ram1500w47
40

My 04 1500 with 4.7 Flex. Would not show pressure and check gauge light on. If restarted it it would be fine. Replace OP sensor and fixed it. However almost exactly 1 year later it started to show low Oil Pressure and light come on at idle. Replace OP sensor and fixed. I guess the after market OP sensors are not as durable. But they are only $15.

4 out of 4 people think this is helpful.
Mikey Geniva Adauto
10

I have a 2007 dodge ram 1500 4.7 and it has oil pressure til i stop once i push the gas it stops. I just changed the motor out and it has a new pump. How much oil pressure should it have? And what can i do to stop it? Please and thank you

1 out of 1 people think this is helpful.

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