Dreezyvette2435

I bought a 86 the guy I bought it off of said the previous owner had a jasper crate motor installed which now has 70k but he doesn't have the paperwork I had my mechanic check it out and he said the motor was swapped how can I find out the history also the 86 seems to have more power than my 91 does crate motors have more hp/torque?

c4cruiser

Jasper replacement engines will have the same (or very close to) power figures as the original year motor. But Jasper also has a line of performance engines. It could be that the engine was one of those.

Jasper engines will have some paper decals with bar codes and a part number. But with the mileage on the car, those decals could have disappeared. Jasper motors as delivered are painted a grey color; is that the engine color now?

Dreezyvette2435

Hey c4 cruiser here's a pic of the engine it's looks stock to me but I was told it was swapped

Mr. Peabody

Just because it looks stock from the outside doesn't mean that it's stock inside.

Dreezyvette2435

Yeah that's true it might be a performance motor I mean it has way more power than my 91 and its chipped ill have my mechanic look for the numbers on it so I can get some more info on it

vetteoz

Not going to tell you a lot.
Paperwork only relates to the engine when it came out of the box

Anything could have been done ( good or bad ) to the engine since it was rebuilt

ch@0s

If you leave it hanging upside down like that all the fluids are going to leak out.

c4cruiser

Jasper engines are "sealed" in that any indication of post-delivery work on the motor will void the warranty. Once an engine is assembled by Jasper, the engine is painted so any exposed gaskets such as the oil pan, front cover, and head gaskets will have paint on them.

DavePlum

Wait, isn't that how everyone finds loose change?

Dreezyvette2435

I sure could use some

Dreezyvette2435

Ok those are some things I need to look for I appreciate the info

Benny42

The '86 having way more power than the '91 may be something else altogether. Check
the rear end ratio of each car. If the '91 has stock 2.59 gears and the '86 has 3.07 or
better... question answered.