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

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Old Jul 26, 2015 | 07:49 PM
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Default Mystery Engine

I recently purchased my first Corvette and it is a 1991 C4 convertible. I am a little confused about what I actually have. I have confirmed that the numbers all match and ordered the build sheet and window sticker from the Corvette Museum. The VIN number and the build sheet all call for a L98 engine but there is a plaque inside the drivers door that says it is an LT1 (picture attached). I purchased the car from a private owner who claims this car was built for a retiring GM executive. I have found no documentation to confirm that.
Any suggestions as to how I might find more information on this car?
Thank you

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Old Jul 26, 2015 | 07:57 PM
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A pic of the engine would help but most likely he stole the sticker and put it on. Stupid move he knew he could be fired and lose his pension for it.
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Old Jul 26, 2015 | 07:58 PM
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The VIN and the build sheet wouldn't lie and it could be confirmed with as simple as a snapshot of the engine. Where is the distributor? Rear of the engine behind the plenum or is it on the front of the engine behind the water pump? There's numerous other ways but I'd say the easiest "tell all" would be distributor location!

Is the tire placard and certification label still on the door also? If there's no tire placard or certification label maybe the one you see was done intentionally to cover the "blank spot" when a repair/repaint was done.

Originally Posted by antfarmer2
A pic of the engine would help but most likely he stole the sticker and put it on. Stupid move he knew he could be fired and lose his pension for it.
Why would anyone "steal" something that's so easily purchased across the counter? Makes no sense.

Last edited by WVZR-1; Jul 26, 2015 at 08:05 PM.
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Old Jul 26, 2015 | 07:59 PM
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Yes post an engine pic
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Old Jul 26, 2015 | 08:02 PM
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Originally Posted by Christi@n
Yes post an engine pic

Hey - you might want to tag a couple more snapshots to your other post also. The only thing I recognized was the "banana" LOL

Seriously a couple more would likely help!
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Old Jul 26, 2015 | 08:08 PM
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Originally Posted by WVZR-1
Hey - you might want to tag a couple more snapshots to your other post also. The only thing I recognized was the "banana" LOL

Seriously a couple more would likely help!
Which post, the part part from gas e
Filter area? �� should it, now i've sern banana

Last edited by Christi@n; Jul 26, 2015 at 08:11 PM.
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Old Jul 26, 2015 | 08:09 PM
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Originally Posted by WVZR-1
The VIN and the build sheet wouldn't lie and it could be confirmed with as simple as a snapshot of the engine. Where is the distributor? Rear of the engine behind the plenum or is it on the front of the engine behind the water pump? There's numerous other ways but I'd say the easiest "tell all" would be distributor location!

Is the tire placard and certification label still on the door also? If there's no tire placard or certification label maybe the one you see was done intentionally to cover the "blank spot" when a repair/repaint was done.



Why would anyone "steal" something that's so easily purchased across the counter? Makes no sense.
The plaque isn't on the door, it is on the drivers rear panel inside the door well. In response to you initial question the distributor is at the rear of the engine.
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Old Jul 26, 2015 | 08:11 PM
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Originally Posted by Sullys 1991
The plaque isn't on the door, it is on the drivers rear panel inside the door well. In response to you initial question the distributor is at the rear of the engine.
Here is an engine picture.
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Old Jul 26, 2015 | 08:12 PM
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Originally Posted by Sullys 1991
The plaque isn't on the door, it is on the drivers rear panel inside the door well. In response to you initial question the distributor is at the rear of the engine.
Distributor on the rear should be l98, lt1 has it on front...

In case you can always donate to me the plaque
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Old Jul 26, 2015 | 08:13 PM
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Originally Posted by Sullys 1991
Here is an engine picture.
Is an l98
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Old Jul 26, 2015 | 08:16 PM
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Originally Posted by WVZR-1
The VIN and the build sheet wouldn't lie and it could be confirmed with as simple as a snapshot of the engine. Where is the distributor? Rear of the engine behind the plenum or is it on the front of the engine behind the water pump? There's numerous other ways but I'd say the easiest "tell all" would be distributor location!

Is the tire placard and certification label still on the door also? If there's no tire placard or certification label maybe the one you see was done intentionally to cover the "blank spot" when a repair/repaint was done.



Why would anyone "steal" something that's so easily purchased across the counter? Makes no sense.
It was not when that car was built. I worked for gm and that would have been a pilot car part. They are all locked up and a big no no. If it was put on after he owned it would be fine.

Last edited by antfarmer2; Jul 26, 2015 at 08:18 PM.
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Old Jul 26, 2015 | 08:18 PM
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Originally Posted by Christi@n
Distributor on the rear should be l98, lt1 has it on front...

In case you can always donate to me the plaque
Grazie, aba non!
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Old Jul 26, 2015 | 08:20 PM
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Originally Posted by Sullys 1991
Grazie, aba non!
I can understand grazie, not the same for aba non
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Old Jul 26, 2015 | 08:26 PM
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Originally Posted by antfarmer2
It was not when that car was built. I worked for gm and that would have been a pilot car part. They are all locked up and a big no no. If it was put on after he owned it would be fine.
Hey antfarmer do you know, where Gm located the VIN number on frame, for c4 corvette? I would check this thing
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Old Jul 26, 2015 | 08:30 PM
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Originally Posted by Christi@n
Hey antfarmer do you know, where Gm located the VIN number on frame, for c4 corvette? I would check this thing
I never worked at Bowling Green. I worked at the Yipsillanti and Arlington plant.
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Old Jul 26, 2015 | 08:32 PM
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Originally Posted by antfarmer2
It was not when that car was built. I worked for gm and that would have been a pilot car part.

Nonsense I believe
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Old Jul 26, 2015 | 08:33 PM
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Originally Posted by antfarmer2
I never worked at Bowling Green. I worked at the Yipsillanti and Arlington plant.
K however thx
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Old Jul 26, 2015 | 08:35 PM
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You might want to do some research on that plate. Sometimes they are changed in the pilot process might have a rare find.
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Old Jul 26, 2015 | 08:36 PM
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Originally Posted by WVZR-1
Nonsense I believe
Added more snapshots to banana post
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Old Jul 26, 2015 | 08:39 PM
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Originally Posted by WVZR-1
Nonsense I believe
Believe what you want I am not here for a pissing match. But worked for G.M. for over 30 years. And was in many pilot launches.
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