Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 3rd Gen Ram Tech
Sign in using an external account
Register Forgot Password?


3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

02 4.7L oil pressure problem

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 11-30-2008, 10:52 AM
unkl Dutch unkl Dutch is offline
Registered User
 
Join Date: Nov 2008
Vehicle: 02 4.7 Dodge Ram
Location: Sterling Heights MI
Posts: 5
Default 02 4.7L oil pressure problem

the oil pressure started bouncing around the other day,(down to zero then back to normal) so i did an oil change seeing as how i was due for one anyways, oil, filter, air filter..... tha basics...... when i was done she ran/sounded great....... about 2 miles later the oil pressure dropped out again and within another few miles it started clickin and knockin pretty bad so i parked her. any thoughts would be appreciated. this is the worst time of year for any major problems, i hope its a quick fix i can do myself but its not smelling like it is. not sure if its an oil pump/sending unit or what.......or how muck this may cost..... help! __________________
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 11-30-2008, 10:59 AM
tafet's Avatar
tafet tafet is offline
Professional
 
Join Date: Feb 2007
Vehicle: 03 Ram 1500 4.7
Location: Scott AFB
Posts: 192
Default

I'm not a 100%, but with oil press dropping and then the fact that the motor is knocking. I'd lean towards the oil pump. I'd be a big project if you do it your self. I think you have to drop the tranny to get the oil pan off.
__________________
2003, 1500 4.7, CAI, detroit true track, 4.10 gears, HO cams, e-fan, jet scoop, 180 stat, TCI torque converter, 69mm fastman TB, 08 intake manifold, underdrive pullies, moes fan shroud delete, Gibson shorty headers, magna flow hi flow cat split to dual exhaust after the cat, superchips tune.
Reply With Quote
  #3  
Old 11-30-2008, 11:21 AM
dirtydog's Avatar
dirtydog dirtydog is offline
Moderate User
 
Join Date: Oct 2008
Vehicle: 2008 Ram QC 4x4 BigHorn
Location: Albany, NY
Posts: 10,945
Send a message via Yahoo to dirtydog
Default

another member had the same problem. I would scroll through the posts for the last 10days or so and see if he updated it with the problem. Many were saying to check the pick-up tube and see if it had come loose/fell off or is clogged.
have you tried pouring a can of seafoam in with the oil to rule out clogging or sludging issues? You will have to run the engine, so that would be entirely up to you.
__________________
Reply With Quote
  #4  
Old 11-30-2008, 11:56 AM
AIR RAM AIR RAM is offline
All Star
 
Join Date: Jan 2005
Location: EULESS TEXAS DFW
Posts: 852
Default

Since the tube it bolted to the bed plate in two places... and is a PITA to remove even after those bolts are removed I dont think the pickup could fall out... BUT it could very well be clogged up if the engine has built up sludge.

Either way, if its knocking... damage has been done.

Did you change the filter? A bad filter can cause these issue.

With the fluctuating oil pressure I would normally suggest you check the sending unit... but since its knocking at the same time then that rules out the sending unit.

You MAY be able to run some flush through it and then try adding FULL SYNTHETIC which is also a SLUDGE FIGHTER... run that for a short time and change it ... with FULL SYNTHETIC... If your LUCKY this will clear any/all sludge in the engine and will clear up the pump IF it is indeed SLUDGE causing the issue. Cross your fingers and hope the damage is minimal.

GOOD LUCK & please keep us posted.

SPEED SAFE, AIR RAM
Reply With Quote
  #5  
Old 11-30-2008, 12:11 PM
dazed01 dazed01 is offline
Veteran
 
Join Date: Aug 2008
Vehicle: 08 trx4, 93 rx7
Location: killeen texas
Posts: 295
Send a message via Yahoo to dazed01
Default

I'd drop the pan and clean it out, cheap and easy insurance.
Reply With Quote
  #6  
Old 11-30-2008, 12:27 PM
unkl Dutch unkl Dutch is offline
Registered User
 
Join Date: Nov 2008
Vehicle: 02 4.7 Dodge Ram
Location: Sterling Heights MI
Posts: 5
Default

Quote:
Originally Posted by AIR RAM View Post

Did you change the filter? A bad filter can cause these issue.

yep changed tha filter.

today i have NO pressure what so ever....... lack of a garage at my place is gonna force me to have it towed to a local mechanic and pay the price i think........ seeing as how i dont wanna drive it with the tickin goin on.
Reply With Quote
  #7  
Old 11-30-2008, 12:28 PM
AIR RAM AIR RAM is offline
All Star
 
Join Date: Jan 2005
Location: EULESS TEXAS DFW
Posts: 852
Default

Why? You dont need a lift.... I just crawl under my truck and do it myself...

My bad... Your talking about pulling the pan... Yeah I can see that being a PITA...

Good luck and keep us posted.

SPEED SAFE, AIR RAM
Reply With Quote
  #8  
Old 11-30-2008, 12:36 PM
dazed01 dazed01 is offline
Veteran
 
Join Date: Aug 2008
Vehicle: 08 trx4, 93 rx7
Location: killeen texas
Posts: 295
Send a message via Yahoo to dazed01
Default

Are there any crossmembers in the way to pull the pan on the 4.7?
Reply With Quote
  #9  
Old 11-30-2008, 12:39 PM
AIR RAM AIR RAM is offline
All Star
 
Join Date: Jan 2005
Location: EULESS TEXAS DFW
Posts: 852
Default

Quote:
Originally Posted by dazed01 View Post
Are there any crossmembers in the way to pull the pan on the 4.7?
Yeah, you will need to LIFT the engine to get the pan off... The OIL pick up is in the way and without lifting the engine you will not be able to get the pan off.

SPEED SAFE, AIR RAM
Reply With Quote
  #10  
Old 11-30-2008, 12:41 PM
dazed01 dazed01 is offline
Veteran
 
Join Date: Aug 2008
Vehicle: 08 trx4, 93 rx7
Location: killeen texas
Posts: 295
Send a message via Yahoo to dazed01
Default

hmm, repost
Reply With Quote
  #11  
Old 11-30-2008, 12:42 PM
dazed01 dazed01 is offline
Veteran
 
Join Date: Aug 2008
Vehicle: 08 trx4, 93 rx7
Location: killeen texas
Posts: 295
Send a message via Yahoo to dazed01
Default

Quote:
Originally Posted by AIR RAM View Post
Yeah, you will need to LIFT the engine to get the pan off... The OIL pick up is in the way and without lifting the engine you will not be able to get the pan off.

SPEED SAFE, AIR RAM
That sucks
Reply With Quote
  #12  
Old 11-30-2008, 12:42 PM
unkl Dutch unkl Dutch is offline
Registered User
 
Join Date: Nov 2008
Vehicle: 02 4.7 Dodge Ram
Location: Sterling Heights MI
Posts: 5
Default

Quote:
Originally Posted by AIR RAM View Post
Yeah, you will need to LIFT the engine to get the pan off... The OIL pick up is in the way and without lifting the engine you will not be able to get the pan off.

SPEED SAFE, AIR RAM



yep.......... and a lack of proper tools, no garage, and cold as he## temps here kinda slaps me in tha face.......... looks like my pocket is gonna get taken for a ride on this one........ i dont think i have any other options other than havin it towed to a shop
Reply With Quote
  #13  
Old 11-30-2008, 03:05 PM
unkl Dutch unkl Dutch is offline
Registered User
 
Join Date: Nov 2008
Vehicle: 02 4.7 Dodge Ram
Location: Sterling Heights MI
Posts: 5
Default

so i put her on a flat bed and get her to the shop....... unload it, and start it to move it into a parking spot and..............everything is fine?!?!?! no tickin, full oil pressure, sounds and runs great.......... i left it there for someone to take a look at it anyways....

any new theories???????
Reply With Quote
  #14  
Old 11-30-2008, 04:31 PM
dazed01 dazed01 is offline
Veteran
 
Join Date: Aug 2008
Vehicle: 08 trx4, 93 rx7
Location: killeen texas
Posts: 295
Send a message via Yahoo to dazed01
Default

Quote:
Originally Posted by unkl Dutch View Post
so i put her on a flat bed and get her to the shop....... unload it, and start it to move it into a parking spot and..............everything is fine?!?!?! no tickin, full oil pressure, sounds and runs great.......... i left it there for someone to take a look at it anyways....

any new theories???????
crap floating around in your oil pan
Reply With Quote
  #15  
Old 11-30-2008, 05:55 PM
SeMiGoD's Avatar
SeMiGoD SeMiGoD is offline
Record Breaker
 
Join Date: Mar 2008
Vehicle: 07 Dodge Ram 1500 QC Hemi
Location: Lincoln, ND
Posts: 1,307
Default

mmstar went through this on his 4.7. He dropped the pan, cleaned her up real well and ran several back to back oil changes and he was able to save it.
__________________

A Bunch
Of Extra
Black Stuff
Reply With Quote
  #16  
Old 12-01-2008, 12:06 PM
unkl Dutch unkl Dutch is offline
Registered User
 
Join Date: Nov 2008
Vehicle: 02 4.7 Dodge Ram
Location: Sterling Heights MI
Posts: 5
Default

the shop i took it to said its the pressure releif valve on the sending unit....... i dunno, i had low oil pressure on my gauges in the truck and they said it was actually reading high............ dunno....... $700 bucks out the door i guess............. thank you for all your responses.

Unkl Dutch
Reply With Quote
  #17  
Old 12-01-2008, 12:37 PM
AIR RAM AIR RAM is offline
All Star
 
Join Date: Jan 2005
Location: EULESS TEXAS DFW
Posts: 852
Default

If im not mistaken our Oil Gauge is ON/OFF... So it will not give you an actual indication of actual Oil Pressure... so if there is an issue... its OFF... if pressure is good its ON...

I would check the sending unit... but the "TICKING" is what has me worried... If it was running without ticking then something has to be intermittently restricting oil flow.

Check the pan, clean it out... run some "FLUSH" through it and then some FULL SYNTHETIC oil. That shold brake down any crud and allow it to drain out the pan.

SPEED SAFE, AIR RAM
Reply With Quote
  #18  
Old 02-27-2012, 11:24 AM
KMatts KMatts is offline
Registered User
 
Join Date: Feb 2012
Posts: 1
Question Oil pressure dropped down to nothing on a freshly rebuilt 4.7L

I bought this 2000 Durango with 118,000 miles. had lots of sludge inside and a spun bearing. Pulled the motor, had block and crank machined, replaced the bad connecting rod and piston, got all new parts and put it back together. Started right up after a year and a half of sitting around in a million pieces in my garage. So, now Ive got a fresh 4.7L with everything new from top to bottom bearings, rings, seals, gaskets, filters, timing chains, tensioners, guides, freeze plugs, connecting rod bolts, and of course oil pump. I did re-use the old oil pick-up tube after a complete clean up. I still have a misfiring issue to figure out but my biggest concern right now is the loss of oil pressure. Specs on my book says 4 to 80 psi to be normal... Personally I think 4psi to be a little concerning myself. But anyway, at first, the oil pressure gauge on the dash read about 40psi @ 2000rpm. Let the motor idle for a minute and watched it, then, pressure dropped off to 0. Alarmed, I shut it off, pulled the sending unit off the motor and put in a mechanical gauge. Started it up and watched it. It read 15psi at idle and around 45 @ 2000rpm. Never dropped off to 0. I figured the sensor was bad so I replaced it with a new one. Started up the motor and watched it. Gauge on dash read 30psi at idle and 60 @2000rpm, then, it dropped off to 0 triggering the Check Engine light. Could I just have another bad sensor or a bigger problem? Any thoughts on what this could be? Appreciate it!
Reply With Quote
  #19  
Old 03-19-2014, 08:24 PM
jason wayne jason wayne is offline
Registered User
 
Join Date: Mar 2014
Posts: 1
Default

I have done the exact same thing as you. I rebuilt the engine my self new oil pump and all, and I am loosing oil pressure at idle and after running for a while it drops off completely... WTF? Now my brand new bottom end is knocking and the top end is ticking. No sludge! only running synthetic and I've only got 15 miles on it since rebuilt. Is dodge really ignoring this. Because I'm out $3200+ not including what I bought the truck for, or my labor or the fact that I have been into this motor five times now. I'm so sick over all this. my son is 7 months old I live in the projects and now I'm not only broke but still without a vehicle. anyone else want to go after dodge for this........... who's with me?
Reply With Quote
Old 03-19-2014, 08:24 PM
 
 
 
Reply




Tags
0il, 1500, 2002, 47, 47l, 4x4, clogged, dodge, head, location, oil, pan, pick, pickup, pressure, problems, ram, tube

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 07:39 AM.

Internet Brands, Inc.


Contact Details & Emails