LT1-LT4 Modifications 1993-97 Gen II Small Block V8

No oil pressure???

Thread Tools
 
Search this Thread
 
Old Aug 17, 2009 | 06:28 AM
  #1  
Formula96's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2003
Posts: 675
Likes: 0
From: Longview, TX
Default No oil pressure???

Just finished getting my car back on the road, new exhaust, opti, tranny front seal, and subframes.

While driving home i take off from a stop sign and car gets way down on power, i mean way down, look at gauges and it is running a little hot but the oil pressure is steady dropping till it gets to 0. Turn the car off, check underhood, oil is still good on stick, get my EWP to turn back on (short), and crank the car. sounded like a high compression motor turning over (really slow), cranks. Making some new noises while cranking but not while running.

Pull back on highway, Still wayyyyy down on power, does not want to shift, it ran way up in the RPM's before it would shift, still had oil pressure at this point. go about 1/4 mile like this and the oil pressure is steady dropping.

After killing and restarting several times (i won't run it with 0 oil pressure) i made it to the house. I think the oil pump may be giving up? Maybe it is locking up causing my no power issue and low oil pressure?

SSDD
Reply
Old Aug 17, 2009 | 08:20 AM
  #2  
fleetmgr's Avatar
TECH Addict
 
Joined: Jun 2009
Posts: 2,012
Likes: 0
From: Tulsa, OK
Default

Drain the oil and see what's in it. Bet you've spun a bearing.
Reply
Old Aug 17, 2009 | 09:36 AM
  #3  
derekderek's Avatar
12 Second Club
iTrader: (21)
 
Joined: Jan 2007
Posts: 404
Likes: 0
From: Dothan AL for now
Default

Originally Posted by Formula96
Making some new noises while cranking but not while running.

What kind of noises was it making? I would drain the oil look for shavings and maybe pull the sparkplugs check them out and try to spin the crank with a wrench see how it feels.
Reply
Old Aug 17, 2009 | 09:45 AM
  #4  
Formula96's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2003
Posts: 675
Likes: 0
From: Longview, TX
Default

hmm, hard to explain....

rmp, rmp, clunk, rmp, rmp, clunk.
Reply
Old Aug 17, 2009 | 09:49 AM
  #5  
B4CZR2's Avatar
TECH Enthusiast
 
Joined: Sep 2006
Posts: 521
Likes: 0
From: Spencerport, NY
Default

oil sending unit my car did that with the previous owner
Reply
Old Aug 17, 2009 | 09:54 AM
  #6  
stevema10631's Avatar
On The Tree
 
Joined: Jan 2008
Posts: 118
Likes: 0
Default

i had the same problem i took my caar out one night and oil pressure droped to 0 at idle then it was about 5 psi at 3000rpms i knew it was fried it had no power what so ever. took it apart and spun 2 mains and 6 rods in the process of rebuilding it now.
Reply
Old Aug 17, 2009 | 09:55 AM
  #7  
derekderek's Avatar
12 Second Club
iTrader: (21)
 
Joined: Jan 2007
Posts: 404
Likes: 0
From: Dothan AL for now
Default

Originally Posted by B4CZR2
oil sending unit my car did that with the previous owner
Will the oil sending unit put the car in limp mode? I dont think it will but who knows. I know my oil sending unit was reading off by about 20-30psi when I replaced it.
Reply
Old Aug 17, 2009 | 09:58 AM
  #8  
derekderek's Avatar
12 Second Club
iTrader: (21)
 
Joined: Jan 2007
Posts: 404
Likes: 0
From: Dothan AL for now
Default

Originally Posted by Formula96
hmm, hard to explain....

rmp, rmp, clunk, rmp, rmp, clunk.

Sounds like a spun bearing to me cant mistake that sound
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Aug 17, 2009 | 10:20 AM
  #9  
Formula96's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2003
Posts: 675
Likes: 0
From: Longview, TX
Default

oil sending unit is less than 10,XXX miles old...

Yeah, i am thinking either seized oil pump or spun bearings....

Reply
Old Aug 17, 2009 | 02:25 PM
  #10  
letsrun97z's Avatar
TECH Resident
iTrader: (7)
 
Joined: Feb 2007
Posts: 993
Likes: 0
From: Visalia, Ca
Default

did the sound get louder with rpm's?
Reply
Old Aug 17, 2009 | 02:41 PM
  #11  
Formula96's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2003
Posts: 675
Likes: 0
From: Longview, TX
Default

did not make the noise exept when cranking.
Reply
Old Aug 17, 2009 | 03:56 PM
  #12  
derekderek's Avatar
12 Second Club
iTrader: (21)
 
Joined: Jan 2007
Posts: 404
Likes: 0
From: Dothan AL for now
Default

When are you going to drain the oil? I am curious to know what it is sounds pretty strange. Ohh what transmission do you have? Never mind from your first post i take it it's auto.
Reply
Old Aug 17, 2009 | 04:23 PM
  #13  
Formula96's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Feb 2003
Posts: 675
Likes: 0
From: Longview, TX
Default

hopefully sometime this week, work is pretty busy right now...

yes it is an auto. i kinda hope it is a bearing (BUILD IT!!!).
Reply
Old Aug 17, 2009 | 07:05 PM
  #14  
reaperracer666's Avatar
On The Tree
iTrader: (1)
 
Joined: Oct 2007
Posts: 147
Likes: 0
Default

oil pump, spun rod or main, cam bearings. check oil if shavings bearings if not pump or sending unit
Reply
Old Aug 18, 2009 | 10:53 AM
  #15  
lt1srule's Avatar
Staging Lane
iTrader: (10)
 
Joined: Mar 2009
Posts: 76
Likes: 0
From: ORLANDO .FLORIDA
Default

fryed bearings for sure.
Reply
Old Aug 18, 2009 | 10:58 AM
  #16  
the_merv's Avatar
11 Second Club
Veteran: Air Force
20 Year Member
Loved
Community Favorite
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

Originally Posted by Formula96
did not make the noise exept when cranking.
Could be the Pickup kicking around in the Pan if you hear that only when you are Cranking..


You definately have some Bearing issues after all that though..drain your Oil and see if it looks like glitter.
Reply




All times are GMT -5. The time now is 07:45 AM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE