2003 Impala - 3800 series II v6 Engine - Low Oil Pressure problem - Chevy Impala Forums
Chevy Impala 7th Gen Discussion W-Body 2000-2005. Discuss all Chevy Impala 7th Generation Performance and Technical Discussion here.

User Tag List

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 09-09-2012, 04:33 PM Thread Starter
Junior Member
des1354's Avatar
Join Date: Sep 2012
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
2003 Impala - 3800 series II v6 Engine - Low Oil Pressure problem


I'm having a problem with low oil pressure in my 2003 Impala.

My issue begins with the engine overheating on August 4th, 2012. I took it to a mechanic and they replaced the coolant fitting by the manifold, and also replaced the manifold gaskets, as well as replacing the oil filter and put new oil in. After picking the car up, and driving the car for about 10 miles over half an hour back home, the low oil pressure indicator lit up on the dashboard and the lifters started making noise. I had the car towed back to the garage, where they took the oil pan off, looked at the pickup for the oil pump, and there was a grease-like substance covering it. They cleaned the substance off and changed the oil and filter once again. After picking it up a second time after it was "fixed", I drove the same distance over a half an hour (back to my house) and the low oil pressure indicator lit up again and the lifters began making noise again. So, i had it towed back and here I am.

It isn't a faulty indicator signal because the oil pressure is low once checked by the mechanics, and the lifters are making noises indicating there is a problem and it is not a false reading.

They checked the oil pump the first time they took the oil pan off and found the grease-like substance and they said the oil pump was ok, and that there was no visible wear on the drive mechanism. I mention this because I have read in other Q&A forums that low oil pressure can be caused by wear on the parts that drive the pump if not the pump itself.

So, if it's not an oil pump problem, and there is no visible damage to the inside, does anyone have an idea or suggestion on what could be continuously causing the low oil pressure? I believe it is an unusual problem, as low oil pressure should be indicated almost immediately upon starting the car and not take up to 30 minutes of driving to signal there is a problem?

Any and all help is appreciated, thank you.
des1354 is offline  
Sponsored Links
post #2 of (permalink) Old 09-10-2012, 04:55 PM
8th Gen Antagonist
kingnutin's Avatar
Join Date: Mar 2009
Location: Vancouver , WA
Posts: 13,655
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Thanks: 517
Thanked 1,226 Times in 803 Posts
I would be looking into this "greasy substance", passages are probably clogging up. Possibly something resulting from the overheat?

1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

kingnutin is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

  LinkBacks (?)
LinkBack to this Thread: http://www.impalaforums.com/chevy-impala-7th-gen-discussion/330570-2003-impala-3800-series-ii-v6-engine-low-oil-pressure-problem.html
Posted By For Type Date
2003 Impala - 3800 series II v6 Engine - Low Oil Pressure problem - Chevy Impala Forums This thread Refback 09-09-2012 04:36 PM

Similar Threads
Thread Thread Starter Forum Replies Last Post
2003 3800 3.8L Impala Fuel Pressure Spec RDUB 7th Gen Engine Performance 16 09-11-2012 04:59 PM
3800 Series II Engine Cover Moses Chevy Impala Discussion 2 03-24-2012 06:05 PM
Tire pressure monitoring system problem 4spd409 Automotive Discussion 4 03-30-2010 11:00 AM
Low Oil Pressure problem....HELP!!! MoJoSS Autocare and Maintenance 4 09-07-2009 06:25 AM

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome