Oil Sending Unit Nightmare
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
Oil Sending Unit Nightmare
Well.... replaced my sending unit today... I would rather rebuild a transmission!
I have a 99 LS1. Whoever was the engineer that decided "the more pcv tubing the better it must work" should be shot. And the little vacuum line on the back of the intake manifold?? WTF!
So here are the things that broke...
- fuel evac line from solenoid to fuel line (thanks Marc from Vettenuts!)
- passenger side rubber grommet connecting the the PCV system nightmare just disintegrated (replaced with some high pressure transmission line tubinjg I had laying around)
- Dropped 2 of the little blue seals from the injectors down into the intakes... Hey, valves look in great condition. LOL
- PCV elbow that goes into driver side valve cover cracked in two.
- Right hand pinky finger now has a lot less skin.
- One small rubber "plug" left over that I can't tell WHERE it goes... small, black, soft pliable rubber that is about the same size as the caps that go on a bottle of royal purple lube. Help? engine runs fine so I am not tooooooo worried.
On the positive note, I can now tell my oil pressure!!!!
I have a 99 LS1. Whoever was the engineer that decided "the more pcv tubing the better it must work" should be shot. And the little vacuum line on the back of the intake manifold?? WTF!
So here are the things that broke...
- fuel evac line from solenoid to fuel line (thanks Marc from Vettenuts!)
- passenger side rubber grommet connecting the the PCV system nightmare just disintegrated (replaced with some high pressure transmission line tubinjg I had laying around)
- Dropped 2 of the little blue seals from the injectors down into the intakes... Hey, valves look in great condition. LOL
- PCV elbow that goes into driver side valve cover cracked in two.
- Right hand pinky finger now has a lot less skin.
- One small rubber "plug" left over that I can't tell WHERE it goes... small, black, soft pliable rubber that is about the same size as the caps that go on a bottle of royal purple lube. Help? engine runs fine so I am not tooooooo worried.
On the positive note, I can now tell my oil pressure!!!!
Last edited by myc5toy; May 10, 2011 at 06:05 PM.
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
Its probably good that I got in there and jostled some things around. The car IS 12 years old and some of those rubber/plastic pieces need replacing anyway. I think the evac line was cracked already and I just helped it complete the process.
Still pondering the rubber piece though..
it was filled with oil... 
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
Did the job a few years back along with replacing the knock sensors. Biggest PIA is the vaccum tube. Went over to the local auto store and picked up a few feet of extra line and added an extension to the factory line.
Other than that, it was a pretty uneventful task.
Other than that, it was a pretty uneventful task.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
I just looked over everything I could see and even used a bright led flashlight to look into all the nooks and crannies. I KNOW this came off somewhere because I always clean the garage floor really well before starting a project.. you know, to see what you forget to put back on! LOL
Administrator
Joined: Mar 2001
Posts: 368,390
Likes: 24,791
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Quite a few roadblocks, but glad to see you got it done. Hope I don't have to try that repair for a long time.
Burning Brakes
Joined: Oct 2007
Posts: 813
Likes: 0
From: N E area of state Kansas
Racer
Joined: Oct 2010
Posts: 450
Likes: 18
From: NORTHPORT NY
I hope that does not discourage you from future repairs....
Sometimes things go wrong, you prob. Needed to change those parts anyway they were dry rotted. I made a little extention for the p.i.t.a. Hose at the back of the manifold, otherwise it wasnt that bad. Good luck in the future
Sometimes things go wrong, you prob. Needed to change those parts anyway they were dry rotted. I made a little extention for the p.i.t.a. Hose at the back of the manifold, otherwise it wasnt that bad. Good luck in the future
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
I hope that does not discourage you from future repairs....
Sometimes things go wrong, you prob. Needed to change those parts anyway they were dry rotted. I made a little extention for the p.i.t.a. Hose at the back of the manifold, otherwise it wasnt that bad. Good luck in the future
Sometimes things go wrong, you prob. Needed to change those parts anyway they were dry rotted. I made a little extention for the p.i.t.a. Hose at the back of the manifold, otherwise it wasnt that bad. Good luck in the future
I ripped apart an entire 2005 mustang when it was 2 days old just because... LOL
Just makes you realize the gap between the engineers that put things on paper (or computer) and the people that fix and repair these things.
Instructor
Joined: Feb 2007
Posts: 204
Likes: 1
From: Crestwood KY
You know you will be doing this again if you replaced with a stock sensor. I went through 3 in a year.
I switched mine to the brass Buick sensor. There should be a DIY with parts in the tech section.
I switched mine to the brass Buick sensor. There should be a DIY with parts in the tech section.
Burning Brakes
Joined: Mar 2002
Posts: 1,091
Likes: 3
From: Amherstburg Ontario
Thread Starter
Pro
Joined: Jun 2010
Posts: 524
Likes: 0
From: Greenville SC
http://www.youtube.com/watch?v=5PvlD...e_gdata_player
Good luck with this one. I have WAY more tubing and crap behind my intake than he does... No way I could get a socket in there.
Good luck with this one. I have WAY more tubing and crap behind my intake than he does... No way I could get a socket in there.
Drifting
Joined: Feb 2007
Posts: 1,793
Likes: 7
From: Santa Maria Ca.
I'm changing mine this weekend-got the relocation kit from West Coast Corvettes-it comes with the Buick brass sensor.
This time will be a pain in the a$$,but the next one won't.
As luck would have it(?),my passenger side air check valve took a dump at almost the same time(another well thought-out part placement by GM),so while I'm in there....
This time will be a pain in the a$$,but the next one won't.
As luck would have it(?),my passenger side air check valve took a dump at almost the same time(another well thought-out part placement by GM),so while I'm in there....
Burning Brakes
Joined: Sep 2006
Posts: 1,061
Likes: 106
From: The Natures Coast/Caribbean
Man I had mine 4 and a half years, I'm not sweating the oil guage. Forgetaboutit.......... Thats so insane, and everyone replaced goes out right away. thats crazy. It ought to be a recall...ha ha ha.
Le Mans Master
Joined: Sep 2010
Posts: 5,520
Likes: 5
From: Long Island NY
I did mine that way too about six months ago. Took about an hour to do and has been working great since. Very simple procedure and if it happens again I have an access panel that will cut the time in half.