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dodgeit
Dodge Dakota
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6/12/2002
17:24:19
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 Subject: Oil pressure question
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I have a 5.2 97 2wd with 109,500 on it. Heres my problem... my oil pressure guage will drop to zero at idle and the red light comes on, then it will come back up on its own after about 5 seconds or when i give it some thottle. I took it to the dealer and they said it may be a faulty guage or solenoid or something... not sure if they just told me that cause they were busy and i didnt schedule an appointment or what, but they didnt have the truck up for long... well the reason i'm worrying now, is because the guage is starting to drop more often, even when i increase idle speed. I was just wondering if anyone with the same truck/engine/year is haveing this prob, advice would help. I found one thread related to the subject a little while ago but the guys guage was only doing this when he put it in reverse (i have a 5 speed) and he ended up haveing to have a bunch of work done in his block...(as i shudder) please someone tell me i can just replace the guage??
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dak318
Dodge Dakota
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6/12/2002
18:53:00
|  RE: Oil pressure question
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I don't have the same truck, but it sounds like the oil pump is going out.
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sandman
Dodge Dakota
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6/12/2002
20:08:56
|  RE: Oil pressure question
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You need to let a competent Tech. look at this. They can hook a mechanical oil pressure guage up to it. You realy do not want to drive this with low pressure. You should be able to get away with oil pressure so low that the lifter are ticking with out it cause too much damage to lower end. Oil pressure this low (below 8 psi) will cause damage to the upper half of your engine quickly. You realy do not want to drive them with pressure this low. THe most important thing is that the pressure comes up with RPM's!!!!!
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91Dakota318
Dodge Dakota
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6/12/2002
22:59:28
|  RE: Oil pressure question
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I had the same problem a few thousand miles ago. Fixed it by replacing the oil sending unit. Oil pressure is back once again just like she was brand new; however, it does take a special socket to remove old one. Hope this will help and save you some bucks.
Good Luck
.
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blak dakota
Dodge Dakota
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6/12/2002
23:02:41
| RE: Oil pressure question
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my posts dont show up!! its your oil pump!! if this one shows up, i'll explain!!
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blak dakota
Dodge Dakota
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6/13/2002
22:59:41
| RE: Oil pressure question
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i have the same problem, i just bought a used 99' r/t with only 38k miles on it. The oil pump doesnt work at low engine speeds (lower then 1600). That means your valves are "dry" at those rpm's, meaning no oil is getting to them becasue the pump doesnt hold enough pressure to send it theere. I took my truck to the dealership, expecting it to be back the next day just because of the pump, but now it is taking 1 or 2 weeks to finish. They have to order and replace a bunch of internal that were ruined because the previos owner was an idoit and didnt take care of it in time! Thank you autonation for selling me a #$%@ed up truck. Oh well, im still happy with my r/t, im just thanking god for that warantee!!
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dodgeit
Dodge Dakota
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6/14/2002
01:29:59
| RE: Oil pressure question
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Wow, yessir, i always buy a waranty on anything i purchase. How ever, my waranty was up a long time ago!
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jack
Dodge Dakota
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6/14/2002
09:59:22
| RE: Oil pressure question
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let's not forget a plain old dirty oil filter or low oil level. A blown plenum gasket will suck oil out very quickly and will produce this problem. I had it until I replaced the gasket. Before you get expensive, check the plenum gasket and repair as necessary, change the oil and filter. I also leave 1/2 quart oil short and add 1/2 quart marvel mystery oil to make up the difference. If the engine is real dirty you might need to replace the oil and filter a second time in a short interval.
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Stephen
Dodge Dakota
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12/04/2002
01:16:49
| RE: Oil pressure question
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I have the same problme that just started on my 97 dakota with the 5.2 engine. I changed the oil preesure switch, but it still didnt fix the probelem. I will update as soon as I find out the problem.
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buzzbass
Dodge Dakota
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12/04/2002
08:37:26
| RE: Oil pressure question
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The oil pressure senders have been known to go bad in the Magnum V-8s. Chances are, that's what it is. If you've maintained that motor properly, you should still be solid @ 109K. If the valves aren't tapping like a mother, you're probably fine with the oil pressure. I had a very similar problem on my '96 Ram, turned out to be the sender unit.
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Nathan
Dodge Dakota
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12/11/2002
20:58:21
| RE: Oil pressure question
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I have a 97 Ram with a 5.2 and have the same problem. I just bought this truck with 96K miles on it. The oil light will come on and the oil pressure guage will flicker to zero when conditions are right. This will only happen when the engine temp reaches 200 degrees, the truck is in gear, and is idling. It won't do it at lower engine temps because the warmer the engine gets, the lower the rpm's drop at idle. Give it a little gas, everything returns to normal. I replaced the oil pressure switch - didn't work. Just took it to a mechanic - he used a mechanical oil pressure guage and said pressure never dropped below 9 psi, even when those conditions were met. But the oil light never came on for him. Truck runs quietly and smoothly at idle. I'm not sure what to think and what to do next. Maybe something electrical? I might hook up a mechanical oil pressure guage myself and watch it for a while. I'm interested in anyone's thoughts/questions about this.
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jimspac
Dodge Dakota
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1/10/2003
17:19:06
| RE: Oil pressure question
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I have had a series of oil pressure problems with my 1995 Ram 1500 5.9L engine. The first time it was a faulty gage system. This last time I did mechanical pressure test and found the pressure gage to be accurate...zero. I pulled the oil pan to replace the oil pump and found the pick up screen has a spherical cup over the screen with a slot in it to allow the oil to pass to the pump. What I found was that this cup did not allow burnt oil particles to fall off the screen when the engine is shut down. Over a period of time, regular oil changes do not flush the screen and more and more particles lodge into the cup. My screen was completely plugged. The replacement screen does not have this protector cup. I have to replace my engine as I thought initially the gage was acting up again.
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Quad
Dodge Dakota
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1/10/2003
19:15:37
|  RE: Oil pressure question
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I Have a Dokoda QC 4x4 with 5.9 v8. I just bought the truck and didn't notice the oil presure drop till I changed the oil. I change the oil just after 1,500 miles and the presure gage at idle is at the first mark it comes up to almost the second mark when driving. What is my problem.
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aggie97
Dodge Dakota
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1/10/2003
23:42:59
| RE: Oil pressure question
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How hard is it to remove the oil pan with the engine in the truck on a 94 318? My dad's truck has a guage that is flickering at idle and I think it is a clogged pickup. he is changing the sending unit tomorrow to see what gives. Next step is pull the pan and check the screen or probably hook up the mechanical guage or maybe an after market in the cab. 119k miles but has been mostly synthetic so I don't think it is a sludge problem.
do the engine mounts have to come loose and raise the engine to get the pan off?
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jimspac
Dodge Dakota
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1/11/2003
13:22:48
| RE: Oil pressure question
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I referenced a Haynes manual and it says to unbolt the motor mounts and raise the engine. I found it much easier to use a floor jack and a post under the bumper to lift the body and engine off the axle. That is a lot less intensive then the Haynes proceedure. I inquired of my dealer's service dept also and they claim to drop the front diff. They also qouted $1000 - 1200 to change the oil pump. If you have a tranny cooler you have to push around the lines to get the pan out.
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mptshoe
Dodge Dakota
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1/13/2003
23:51:27
| RE: Oil pressure question
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I have the same oil pressure problem on my 1996 Ram 1500 5.2L. The dealer told me to replace the oxygen sensor. That did not fix the problem. I'm glad I didn't let them do it. They wanted $240 to change it. If anyone else has any answers on the pressure dropping problem please HELP. I'm baffled.
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Jacque
Dodge Dakota
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1/14/2003
10:45:11
| RE: Oil pressure question
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Some times it is the sending unit for the oil guage. However, the magnum engines have smaller strainers than those that were on the LA style engine. That creates a problem the way they are made. A friend of mine just dropped the pan on his girlfriends Dakota V-6. He said that there was a hole as big as your little finger where the oil was going into the strainer. Another one was completely stopped up and had a hard coating of oil over the strainer.
The local shop has pulled the pan on many a Dakota and Ram because of low oil pressure and cleaned the pan and strainer.
If you are going to drop the pan plan on it taking 5-6 hours to do the job. On a V-8, you have to remove the distributer to jack the engine high enough to take the pan off. On V-6's, you don't have to take the distributer out to jack it high enough to remove the pan.
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mptshoe
Dodge Dakota
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1/21/2003
13:20:14
| RE: Oil pressure question
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Well thanks for the input everyone. I changed my sending unit and it fixed the problem. The sending unit was physically broken. Probably from changing the tranny. I hope this helps anyone who needs it.
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Andy
Dodge Dakota
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2/05/2003
13:29:10
| RE: Oil pressure question
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I have a '96 Ram 1500 with the same engine(95000 miles) and the same problem. I stopped a couple of days ago to check the oil just to make sure and the Dipstick broke in half because of corrosion and build up in the engine. My mechanic told me this is extremely common in Chrysler vehicles and not worry about the guage reading 0. He said Chryslers are very bad about having build up(sludge), even if you change your oil regularly. It has something to do with condensation while the engine cools. Sometimes some of the sludge will break free and cause the sensor to read 0. This could turn into a huge problem and cause the engine to seize. I'm going to try flushing out the engine and see if that helps. If not, I think it's time to get a new Silverado.
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Jim Smith
Dodge Dakota
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2/05/2003
18:32:17
| RE: Oil pressure question
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You very much need to worry about Zero oil pressure unless you do not mind replacing your engine as I may need to. Pull off the oil pan and check the filter screen. Reference one of my earlier posts where I fully explain the problem. These filter screens jam up with burnt oil particles that regular oil changes and engine flushs will not dislodge
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AlexFitz
Dodge Dakota
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2/11/2003
18:52:45
| RE: Oil pressure question
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I have been having the same problem with the gauge going out and coming back on. Verdict from dealer is sludge clogged oil pick up screen. They want to replace the whole engine. My 97 5.2 has 90000 miles and I am thinking about just having the screen replaced and cleaned. I have tried flushing but that hasnt worked. Does anyone have any thoughts on this?
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AlexFitz
Dodge Dakota
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2/11/2003
18:54:30
| Clogged Oil Pick Up screen
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I have been having a problem with the gauge going out and coming back on. Verdict from dealer is sludge clogged oil pick up screen. They want to replace the whole engine. My 97 5.2 has 90000 miles and I am thinking about just having the screen replaced and cleaned. I have tried flushing the engine but that hasnt worked. Does anyone have any thoughts on this?
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jimspac
Dodge Dakota
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2/11/2003
19:59:59
| RE: Oil pressure question
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Hi Alex,
If you are not getting loud lifter noise or squealing from the engine, just replace the oil pump and filter screen. You might as well replace the pump for the effort or expense involved in dropping the oil pan. If your engine has not endured long periods of no oil pressure, it should be ok just doing the pump and screen. Make sure the replacement screen does NOT have a metal shield over the screen. That screen is the most likely culprit as it does not allow burnt oil particles to fall off the screen when engine is shut down. If you can do it yourself, you can save some real money as my dealer wanted 1000 to 1200 to change pump and screen. Refer to earlier posts about the involvement.
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rickwilson
Dodge Dakota
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2/12/2003
00:55:37
| RE: Oil pressure question
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just bought my 99 dak V8, has the same problem. the oil gage drops to 0 only at idle not in park. took it back to dealer, they replaced the sending unit, checked the gage and then replaced the oil pump. after @ 70 miles it started doing the same thing again. What do I do now? ps-they said the screen and pickup tube checked out fine.
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jimspac
Dodge Dakota
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2/12/2003
08:11:44
| RE: Oil pressure question
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Rick,
Are you sure the dealer really changed the pump and screen?
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rick wilson
Dodge Dakota
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2/12/2003
08:37:07
|  RE: Oil pressure question
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jim, no I'm not really sure , they said they did and they had it for @ a week. Kept saying what a job (5-6 hours) it was to drop the pan.
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jimspac
Dodge Dakota
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2/12/2003
09:48:13
| RE: Oil pressure question
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Rick, if you refer to some of my earlier posts, I and a few others mention the design flaw of the filter screen assy used in Dodge V8s. It would be worth your while to remove the pan yourself or have an independant mechanic do so. I may have to replace my engine and doing the pump, screen, and clean the sludge out of the pan is worth the effort.
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rick
Dodge Dakota
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2/13/2003
22:13:22
| RE: Oil pressure question
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jim,
Your'e right, the only way to be sure is to do it myself, but I just bought it 2 weeks ago and the dealer's had it for the last one!! They are paying for it to go to the Chrysler dealership since they can't figure it out. By the way, the mechanic told me today that the pan & screen looked real clean, no sludge.
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jimspac
Dodge Dakota
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2/14/2003
08:28:43
| RE: Oil pressure question
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rick,
It has been my experience that used vehicle dealers do as little as possible when under warranty. I have heard stories of dealers promising to change transmission filters and fluid and having the transmission fail with mech saying filter was never changed. You do not mention how many miles your Dak has, but over 70k is a prime candidate for the screen. If the pressure changes going from park to drive without an increase in rpm, then the problem sounds electrical. Min was zero no matter what until engine reached full op temp.If you have just purchased the vehicle, keep on the dealer until it is fixed or make him take it back for refund.
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rick
Dodge Dakota
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2/14/2003
23:58:14
| RE: Oil pressure question
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jim,
It has 42000 on it. It intermittently drops to 0 only after it's warmed up. It never does it in Park only in drive. Increasing RPM's makes the pressure gage bounce back up. If I wasm't so crazy about the truck I would have already taken it back for refund. I'm worried though, I hear rattles coming from the suspension and tranny is acting funny too! See my other posting, "tranny slipping when cold?" This Dak may have too many problems for me. I bought a warranty also, for whatever it's worth.
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jimspac
Dodge Dakota
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2/15/2003
10:33:10
| RE: Oil pressure question
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My first problem with the oil pressure was electrical, my dodge dealer replaced a relay or something and it was fine until the recent trouble. That is what sounds most likely for oil pressure, too early for particle buildup unless oil was never changed. Brings up another issue: pre ownership. You never know the truth about the usage of a vehicle before you owned it buying used. That could account for the suspension rattles and transmission problems. The early service on the tranny may have been skipped( band adjustment before 30 or 40K) I have a 1995 Ram that I am original owner for. I had all my services done under warranty and my tranny is fine at 140K, engine a victim of the filter screen.
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