I bought my '95 LT1 coupe about a month and a half ago and am simply in love with it.

This car has 160k miles on it, and the only thing that shows wear are the seats. I put some Iggee's on and took care of that. i have replaced the brakes and now the ECT sensor which was making me crazy, but other than that this car acts like a good used car, but not like a 160k mile car. Runs really tight, shifts strong, doesn't smoke or leak a drop and everything works great. The drive train seems so good I am wondering if it has been rebuilt. Carfax doesn't tell me anything to that point.

I have been looking for signs and there are some bolts here and there that look like they may have been wrenched on, and I noticed some orange gasket sealer peeking out from the exhaust manifolds, and I can detect a blue head gasket peeking out as well. things are so clean, but not detailed that I wonder.

Other than those small details, what else can I look at to give me a sign of original or rebuilt?

 

No way to contact the previous owner for more answers? The fact that you have no leaks would make me suspect it has been. Most LT1's with those miles would be leaking profusely from every seal and will have coated the entire bottom of the car with a thick layer of greasy crud. Compare the appearance of the engine to the bottom of the car and the front crossmember. Is the engine block, front cover, oil pan, engine accessory bracket, etc. cleaner than the front crossmember? If untouched and original the engine should look about the same as the underside of the car. Look at the hoses, clamps, wiring harness connectors, wire looms and sparkplug wires very closely. LT-1's are difficult to get all of these items back on just as the factory did; plastic clips break off easily for example, sometimes retaining clips are not plugged back into holes in nearby brackets, sparkplug wires are difficult to route exactly as the factory did. These would just be clues of course because a fussy owner would make sure everything was put back on correctly but many times mechanics are in a hurry and they are not. The head gaskets have been changed and the orange silicone is not OEM so at least the heads have been off. Look at the block deck at the left rear corner near the tranmission bellhousing. If the block was resurfaced the serial numbers will be gone due to being a very light stamping. A rebuilder can elect to not true the decks of course but most of them do it. Pull a valve cover for a look inside. Although if the oil was changed at good intervals it could be clean and hard to tell but generally speaking does it look like 160K miles of accumulation in there? The strongest evidence for a rebuilt engine without taking the oil pan off for a check inside is the block resurfacing but again the rebuilder may have just felt the decks were OK. Short of documentation or partial disassembly to inspect and measure some internal components about all you can do is consider all the points discussed here and make an educated guess about it.

 

The blue head gasket is not factory, likely a Felpro. So we know at least the heads have been off. Silicone on exhaust manifolds, I can't believe people do that.... Sounds like you got a nice car, enjoy it.

 

Thanks...
the underside of the car has zero signs of any leaks or crud build up. A little dirty from the road, but no build up or oily grime.
the orange on the exhaust manifolds is a copper based sealant that rebuilders that I have known in my past have used with great success on exhaust manifolds, even with out gaskets.

I can see inside the valve covers from the oil cap and it looks spotless, and the rocker arms seems to have good travel while running, indicating a cam with good bumps and no flat lobes.

The wiring seems original, but there are some broken retainer clips that I had attributed to age, but maybe from an overhaul.

Thanks for the feedback.

 

You may have gotten a Vette that was owned by a true Corvette enthusiast.
The are the type that gets everything fixed, replaced, cleaned polished and generally spends a lot of time AND money on their Vettes.
If so, it will be just about good as new. Count yourself lucky if you got one of THOSE Vettes. They ARE out there.

The ones owned by the 'normal' people are out there also.
To those folks the Vette is JUST a car just like their Yugo or their VOlkswagen.
Their usually pretty easy to spot... nothing you see will look like anyone gave a chitt about the vehicle.
Worn out tires, brakes, upholstery. Bulbs out, dirty carpets, dirty engine, the usual things that tip you off about a used vehicle.
You can revive those Vettes, it's just a LOT of time and money.


Glad you got a good one.