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Topic: Engine Question

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Engine Question

Posted: 1/20/08 9:46am Message 1 of 9
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Osage Beach, MO - USA
Joined: 1/20/2008
Posts: 2
Vette(s): 1975 L82
3 years ago bought my dream car a 75 vette.  Not knowing much about cars I wonder if I was taken.  Based on what I was sold I thought I had the 350 with the 205hp, the center console even had the 205hp listed below the gear shifter.  Today I found how to read the VIN and the 5th number being a J means it is 165hp?  Is this true


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Engine Question

Posted: 1/20/08 10:08am Message 2 of 9
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Eastern Oklahoma County, OK - USA
Joined: 1/3/2006
Posts: 1560
Vette(s): 1980 Black L48 T-Tops
It certainly is possible.  I bought an '80 that turned out to have a 305 in it, not a 350.  Did you check the engine code on the passenger side pad just below the head? 

If it is the correct engine with the car, it will have a code that matches some of the VIN numbers.  You may have to use some degreaser or a scraper to see if the numbers and alpha characters are on the pad.  If the engine has been rebuilt, it is also possible that the numbers have been milled off.



Engine Question

Posted: 1/20/08 10:31am Message 3 of 9
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
If your VIN had the "J", then it was originally an L-48, 165hp engine. Who knows what is in there now?
If you can get the engine ID numbers off of the "stamp pad", that will either confirm, or deny, your car still has the original engine. PLEASE do NOT use a scraper to clean off the pad, if you have any intentions of ever having the car judged at NCRS/Bloomington arenas!! Use a soft rag, and carb/brake cleaner to remove any grease/dirt from the pad. Scraping it with a screwdriver will hurt the pad finish, and your chances of a good score if being judged. If, however, you never intend to have it judged, you can use a little harsher method of cleaning the pad.
On the stamp pad, you will find alpha-numeric codes that identify what the engine was, originally. The VIN portion should reflect the same numbers as the VIN of the car.
It is possible that the engine is original, but it has been rebuilt for a little more HP, by a former caretaker...ya just never know...
Have a look-see at the numbers, and let us know what ya find!


Joel Adams
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Engine Question

Posted: 1/20/08 11:05am Message 4 of 9
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Eastern Oklahoma County, OK - USA
Joined: 1/3/2006
Posts: 1560
Vette(s): 1980 Black L48 T-Tops
My apologies, I learned something today.  Joel, thanks for the correction!Thumbs%20Up

Fortunately, when I did use the scraper, it was on the 305 that the PO had installed in place of the original engine and it was so covered in gunk that nothing seemed to cut it.





Engine Question

Posted: 1/20/08 3:41pm Message 5 of 9
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Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20214
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
Ain't no big thang, Dennis...only becomes an issue when judging the pad. I was pretty careful cleaning the one on the '74...or at least I thought I was. Got hammered on that the first time out!
I have learned that wooden utensils work pretty well, without harming the pad finish.
Again, this only really applies to those that are gonna have their cars judged NCRS/Bloomington...otherwise, scraping doesn't make a difference. Didn't mean to imply the scraping method was cause for the Pad Police to break in yer doors, and repo yer car!


Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Engine Question

Posted: 1/20/08 7:21pm Message 6 of 9
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Osage Beach, MO - USA
Joined: 1/20/2008
Posts: 2
Vette(s): 1975 L82
Thanks for the advice, I will see what I can find


Engine Question

Posted: 1/22/08 12:13pm Message 7 of 9
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Joined: 12/23/2007
Posts: 1
I have a 1981 with a "6" for the eighth digit in the VIN number.  One site I've checked shows this as a "L82" w/230 hp. rather than the regular "L81" w/190 hp (shown as a "*" in the eighth digit).  Anyone know anything about this?


Engine Question

Posted: 1/22/08 12:20pm Message 8 of 9
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Horse Cave, KY - USA
Joined: 10/22/2007
Posts: 488
Vette(s): 1968 convertible; 1980 L-82
[QUOTE=sgt4145]I have a 1981 with a "6" for the eighth digit in the VIN number.  One site I've checked shows this as a "L82" w/230 hp. rather than the regular "L81" w/190 hp (shown as a "*" in the eighth digit).  Anyone know anything about this?[/QUOTE]
 
There were no optional engines for the 81 or 82 models.  All 81s have the L81 350 with the computer.  All 82s have the crossfire.  The last L-82 optional engines were produced during the 1980 model run.
 
Smile



Engine Question

Posted: 1/22/08 2:57pm Message 9 of 9
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Fort Wayne, IN - USA
Joined: 1/17/2005
Posts: 179
Vette(s): '75 Stingray Coupe - 350 Bored, Edelbrock Alum. Heads, Performer Intake/ Carb., Harland Sharp Roller Rockers, MSD Ign., XE Comp. Cam, Pete Jackson Gear Drive, Hooker Headers, Side Pipes, TH400, 3000 RPM Stall and 3.55 Rear Gears
I have a '75 also . First thing I did was start taking it apart and upgrading it. It drove nice on the highway and good gas, but not what I wanted out of a Vette. Here we don;t get inspections and I had the Stated Police come out and certify it an Antique so I could do whatever I wanted.
165 H.P. don't they put those in Hondas?Ying%20Yang



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