C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

87 leaking oil! BAD

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Old May 23, 2010 | 07:39 PM
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Default 87 leaking oil! BAD

So I looked under the car today and saw a large puddle of oil under the front of the motor. I cant see where its coming from other then somewhere on the front of the engine. Can any one guess what could be leaking?
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Old May 23, 2010 | 07:45 PM
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Pretty hard to diagnose from what you've posted:


How far forward how much oil....Front main seal, intake manifold, do you have an oil cooler....?

Time to jack it up and climb under for a good look...usually oil travels down and back so I usually try find the highest, most forward oil trail...
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Old May 23, 2010 | 07:53 PM
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Originally Posted by aboatguy
Pretty hard to diagnose from what you've posted:


How far forward how much oil....Front main seal, intake manifold, do you have an oil cooler....?

Time to jack it up and climb under for a good look...usually oil travels down and back so I usually try find the highest, most forward oil trail...
Looks like half a quart and its lying between the engine and the fan. Its sort of sitting at an angle with the rear slightly higher so you may be right. I will need to jack it up
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Old May 23, 2010 | 07:59 PM
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Originally Posted by tjb101084
Looks like half a quart and its lying between the engine and the fan. Its sort of sitting at an angle with the rear slightly higher so you may be right. I will need to jack it up
1/2 quart is a lot of oil.....
Is it engine oil or Power steering fluid?
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Old May 24, 2010 | 10:41 AM
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Does the car have an auto trans? Could be ATF leaking from the lower cooling line.
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Old May 24, 2010 | 10:57 AM
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With all the information you've given in your profile and this post.

I'd say you've blown your engine and its time to replace the transmission.

Could be leaking oil from the supercharger too.
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Old May 24, 2010 | 11:26 PM
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ITS FIXED ITS FIXED!!!! So there was a vaccum hose that runs from the throttle body to the front drivers side bumper and it was cut in half. So I used some performance duct tape and sealed the tube back to gether. Also during this found some random plug that some how became disconected. BAM fixed. No more engine light or power stutter. Now if I can just figure out why my rear runner lights work but my brake lights dont I can drive this thing. I was like a little kid in a candy shop when I took it for a spin. This thing flys (Compared to how it ran before.)

BUT I still can reach the leak which is coming from the powers steering pump hose. I will get to it later...
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Old May 25, 2010 | 10:26 AM
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Sounds like the hose to the EEC was the culprit. Figuring that the car is 23 years old, it would be a good idea to go thru all of the rubber vacuum hoses and replace them. These hoses get brittle over time and they will crack or come loose where they attach to a metal line.

For the brake lights, do all 4 lights not come on? Does the 3rd brake light work? Do the turn signals flash in the back? Do the 4-way (hazard) flashers work in back?

The brake light switch is on the steering column above the brake pedal. There are separate wires for the service brake lights and the 3rd brake light. Might be just a bad switch.
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Old May 25, 2010 | 12:14 PM
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Originally Posted by tjb101084
ITS FIXED ITS FIXED!!!! So there was a vaccum hose that runs from the throttle body to the front drivers side bumper and it was cut in half. So I used some performance duct tape and sealed the tube back to gether.
So a cut vacuum hose was causing this kind of leak????
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Old May 25, 2010 | 09:20 PM
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Originally Posted by pletzvet
So a cut vacuum hose was causing this kind of leak????
Read last sentence.....power steering hose....good news is if it was power steering hose and it was half a quart the leak is probably fixed due to no more fluid in the pump.. bad new is driving with now power steering fluid is a great way to smoke the power steering pump
Originally Posted by tjb101084
ITS FIXED ITS FIXED!!!! So there was a vaccum hose that runs from the throttle body to the front drivers side bumper and it was cut in half. So I used some performance duct tape and sealed the tube back to gether. Also during this found some random plug that some how became disconected. BAM fixed. No more engine light or power stutter. Now if I can just figure out why my rear runner lights work but my brake lights dont I can drive this thing. I was like a little kid in a candy shop when I took it for a spin. This thing flys (Compared to how it ran before.)

BUT I still can reach the leak which is coming from the powers steering pump hose. I will get to it later...
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Old May 25, 2010 | 09:39 PM
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Originally Posted by c4cruiser
Sounds like the hose to the EEC was the culprit. Figuring that the car is 23 years old, it would be a good idea to go thru all of the rubber vacuum hoses and replace them. These hoses get brittle over time and they will crack or come loose where they attach to a metal line.

For the brake lights, do all 4 lights not come on? Does the 3rd brake light work? Do the turn signals flash in the back? Do the 4-way (hazard) flashers work in back?

The brake light switch is on the steering column above the brake pedal. There are separate wires for the service brake lights and the 3rd brake light. Might be just a bad switch.
The 3rd brake light works as well as the turns and my hazzard switch doesnt work so I cant tell if they work. All four lights come on for the runners but nothing when pressing the brakes. I will check the wires below the steering colum.
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Old May 25, 2010 | 09:41 PM
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Originally Posted by aboatguy
Read last sentence.....power steering hose....good news is if it was power steering hose and it was half a quart the leak is probably fixed due to no more fluid in the pump.. bad new is driving with now power steering fluid is a great way to smoke the power steering pump
After moving the car to play with it the leak wasnt as bad as i thought. The puddle soaked in the drive way just making it look bigger. The pump is still full and I havent added any to it. I will fix it soon as i love power steering
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Old May 25, 2010 | 10:04 PM
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Originally Posted by c4cruiser
Sounds like the hose to the EEC was the culprit. Figuring that the car is 23 years old, it would be a good idea to go thru all of the rubber vacuum hoses and replace them. These hoses get brittle over time and they will crack or come loose where they attach to a metal line.

For the brake lights, do all 4 lights not come on? Does the 3rd brake light work? Do the turn signals flash in the back? Do the 4-way (hazard) flashers work in back?

The brake light switch is on the steering column above the brake pedal. There are separate wires for the service brake lights and the 3rd brake light. Might be just a bad switch.
So I checked the brake pedal wires and sure enough I found a ground that was cut. I am going to wire now and see if this is my fix. Heres some pics. Thanks for the direction!



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Old May 26, 2010 | 12:36 AM
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You know its funny how you can just go out to your car to inspect something and then end up sending the rest of the day taking things apart to fix. LOL! Well I was able to fix the brake lights thanks to your advice where to look but then my window track ribbon can loose so I had to take the door apart to reset the ribbon. All and all today was fun and I got some things done. Thanks every one!
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Old May 26, 2010 | 10:05 AM
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Looks like a clean cut.
I have to ask myself a question./

WHY would someone cut a ground wire?
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