96' Oil Leak
Thread Starter
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
96' Oil Leak
While changing out my O2 sensors I notice the passenger side front sensors connector was oily. What would cause a small leak on the right top side rear of an LT-1? It is a small amount and never makes it to the ground but now would be a good time to fix it.
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Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
Here is 96GS#007's method. This is the method I used.
Factory Service Manual. Here's my short version however...
On the LT1/4 it's not a big deal.
- Pull off the "CORVETTE" beauty covers.
- Disconnect the various electrical connectors
- Remove the nuts that hold the electrical harnesses to each side of the intake
- Move the harnesses out of the way
- Remove the 4 bolts that hold the fuel rail in place
- Remove the fuel rail/injector assembly from the intake (leave attached to fuel lines and simply set it on a towel on the windshield)
- Remove the throttle body and the throttle cable
- Remove throttle cable bracket
- Remove any misc items/hoses...PCV valve & hose, AIR connections, EGR (on the LT1), etc.
- Remove the intake manifold bolts
- Remove manifold & old gaskets
- Clean, clean, clean the sealing surfaces
- Clean intake bolt threads
- Install new gaskets
- Apply RTV sealer to the block for the end seals
- Set intake in place. Apply liquid teflon to the intake bolt threads and torque bolts per Factory Service Manual specs and sequence
- Reassemble the remainder in reverse of above
That pretty much covers the major stuff.
3 to 5 hour job. 2 or slightly more if you can really spin the wrenches and everything goes your way.
[Modified by 96GS#007, 7:26 AM 7/8/2003]
On the LT1/4 it's not a big deal.
- Pull off the "CORVETTE" beauty covers.
- Disconnect the various electrical connectors
- Remove the nuts that hold the electrical harnesses to each side of the intake
- Move the harnesses out of the way
- Remove the 4 bolts that hold the fuel rail in place
- Remove the fuel rail/injector assembly from the intake (leave attached to fuel lines and simply set it on a towel on the windshield)
- Remove the throttle body and the throttle cable
- Remove throttle cable bracket
- Remove any misc items/hoses...PCV valve & hose, AIR connections, EGR (on the LT1), etc.
- Remove the intake manifold bolts
- Remove manifold & old gaskets
- Clean, clean, clean the sealing surfaces
- Clean intake bolt threads
- Install new gaskets
- Apply RTV sealer to the block for the end seals
- Set intake in place. Apply liquid teflon to the intake bolt threads and torque bolts per Factory Service Manual specs and sequence
- Reassemble the remainder in reverse of above
That pretty much covers the major stuff.
3 to 5 hour job. 2 or slightly more if you can really spin the wrenches and everything goes your way.
[Modified by 96GS#007, 7:26 AM 7/8/2003]
Thread Starter
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
Thanks. That's perfect. I was planning on replacing all the fuel injectors with the FIC Bosh III's so this is just slightly more work. Of course once I get it off the jack stands I'll try and trace the leak to be sure. That and I have some iridium spark plugs I want to install. That is all I planned to do engine wise. Maybe new wires. They are the originals but the engine runs fine so I figure just leave things alone. 
Thread Starter
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
I still have a lot of work on the suspension and it will be several weeks till I get it on the ground. Once I do I'll try and find the source. It is very little, but from past experience I know it will get worse. The car has less then 60k miles on it and has always been leak free. It is only because I was replacing the O2's that I even know it is there. At this point it really isn't a problem but my plans were to replace Injectors so that would be as good a time as any to fix this. Once I find it I'll post what it is.