What car is this engine from? - Impala Tech
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post #1 of 17 (permalink) Old 09-06-2015, 10:01 AM Thread Starter
 
 
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What car is this engine from?

I have a hipo big block that came out of a 1966 Impala, I think. The # stamped on the block deck is N149492. Cast into the block is the # T0223, also on the left side A206 and on the rear HiPerf Truck Pass. From what I can tell this is a 1966 396. Is there anyway to find the car in which this engine was originally installed?

Thanks,
Chris
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post #2 of 17 (permalink) Old 09-06-2015, 11:39 AM
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Welcome to the team Chris!

The numbers you gave will match the last six numbers of the vehicles VIN. There is another set of numbers stamped next to that number that will end in two or three letters. Those numbers tell where it was built, when and the original application.

If you post that information I can answer what it came out of and when it was built. There are nine different combinations of carburetor and transmission used in 1966 in a B-body car depending upon police, taxi or passenger car use, though all of the 396 engines in the full size car where called out by the same RPO code of L35 for a 325 horsepower 396. All of the application codes start with the letter I so if you see only one letter say an IB or an IN the I should be an I and not a 1 though frequently since they were hand stamped these two marking dies were interchanged.

Possible codes are: IAH, IAR, IB, IGH, IGR, IN, IVH, IVR. The difference between the two or three letters is caused by the factory switching over to three letters to avoid repeating previous combinations. At this time Tonawanda hadn't cast as many engines as the Flint foundry had so it was still using a two letter code. Your date code is for the first week of February of either 1966, or '76 (or '86, 'or '96) block. The difference is obvious if you can see the rear cam tunnel of the block as in 1976 there was a groove cast into the block to distribute oil to the top end, in 1966 the groove was machined into the back most journal of the cam shaft. That expensive operation was dropped in late 1966 to save money in machining.

By high performance I am assuming your block has four bolts holding on the main caps. That and the extra hole machined above the oil filter for use with an oil cooler in Corvette applications make it a high performance block, other wise it is either a truck block (also has four bolt mains) but is cast out of higher nickel content nodular iron and is taller than a standard passenger car block. This is visually identified by looking for an extra half inch (0.400" to be exact) of block above the top of the water pump. A truck block is also machined for an oil cooler. If it is a two bolt block you have the last the three words cast into the side of the block at the foundry which is Pass (funny how everyone assumes it must be a HiPerf if they see that word anywhere on a block when it also says Pass for passenger car).

The Pass and the HiPerf block are both cast from the same molds. The only difference between the blocks is the machining as a HiPerf gets an extra hole drilled for an oil cooler return line and the two extra holes for the two additional main cap bolts. The main caps are cast in different molds as they shape is different, but the machining of the block main cap registers is the same. There were no high performance big blocks ever installed in an Impala except for the 427 SS made in 1967-'69 which had either a 390 horse two bolt block or a 425 horse four bolt block. All of the 396 engines used two bolt Pass blocks to get either a 325 horse or a 350 horse engine (used different flat tappet hydraulic cams to gain the extra power).

Because of the added height they must use a different mold for a truck block So I have no idea why the foundry includes that word on blocks going into a car. The added deck height is to accommodate the fourth ring on the piston that truck blocks have to seal an engine that spends it's life at near WOT for a hundred thousand miles or more.

Big Dave
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post #3 of 17 (permalink) Old 09-06-2015, 12:47 PM
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Doesn't sound like a '66 to me.

On the Engine Pad and at the end of those combination of Letters and Numbers, there is an Engine Suffix Code. It will be in Letters only.

I don't see any indication of that Code anywhere.

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post #4 of 17 (permalink) Old 09-06-2015, 04:22 PM
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Engine

As indicated we need the 2 letter suffix after the T0223: Let's work based on only assumptions and the information you supplied. The engine was built on February 23, 1966, if this is a 1966 engine. The VIN number of the car this engine was from would end with N149492, the car was built in the Norwood Ohio Plant. Now, depending on which Impala model the car was from the first 5 numbers of the VIN would be as follows:
IMPALA 8 2D SPT CPE 16437
IMPALA 8 3S WAGON 16445
IMPALA 8 4D SEDAN 16469
IMPALA 8 4D SP SED 16439
IMPALA 8 CONVERT 16467
IMPALA SS 8 CONVERT 16867
IMPALA SS 8 SPT CPE 16837
the 6th digit would be a 6, so as an example, if the engine came from
a 1966 Impala 8 cylinder Super Sport, the VIN would have been:
168376N149492.

I only supplied model numbers of 8 cylinder Impalas. Try to take a pic of get us the 2 letter Suffix.

Paul

Paul

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post #5 of 17 (permalink) Old 09-19-2015, 02:28 PM Thread Starter
 
 
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4 bolt block

Thanks for all your responses! Sorry for the slow response on my part. Just got back in town.
I looked at the block again and can see the following stamped on the deck; T0223ID. Below that right on the edge and much more irregularly spaced are; N1(?) 4 6 4 6. See attached photos. It is a 4 bolt block. Has a square pipe plug just above the oil filter mount.
What else do you need to know to positively identify the block?
Thanks!
Chris
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post #6 of 17 (permalink) Old 09-19-2015, 04:16 PM
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That is a 1966 427 BBC block missing the main caps. Came out of a 1966 Special High Performance (special order) manual four speed full size (b-body) car. It is identified by the fact that the two letter suffix on the engine ID pad ends with the letters ID.

It requires a grooved rear cam journal to work and special 1965 -'66 BBC cam bearings (the 425 horse 427 was a mechanical flat tappet cam). If you find the main caps and they were marked where they go you can reinstall them other wise you will have to scour machine shops looking for a set of caps and have the blocl and caps alin bored.

Here is the usual 390 horse 427 in a '66 Caprice.

https://www.youtube.com/watch?v=8MYqqu5Dkpc

Big Dave
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post #7 of 17 (permalink) Old 09-19-2015, 08:58 PM Thread Starter
 
 
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Cool! Thanks for the info Dave! I have the main caps plus the heads, crank, rods, etc. Is there any way to find if the car in which the engine was originally installed still exists? I bet the owner would love to have the original engine for it.

Cheers!
Chris
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post #8 of 17 (permalink) Old 09-19-2015, 09:09 PM
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OK, now it sounds like a '66 to me, lol.

(As Dave has also stated).

Bill

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post #9 of 17 (permalink) Old 09-20-2015, 08:37 AM
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ID code

Well, if it's a 66 ID code engine then the only engine it could be is the very rare 427/425 HP motor. It still could have come out of any of the models I described in my last post above, so although we know the VIN suffix the model prefix could have been any 1 of 7.

Paul

I'm checking with Warren and Roland who have extensive data bases by VIN # to see if they have any Norwood built cars with that VIN suffix.

Paul

1966 Impala SS

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post #10 of 17 (permalink) Old 09-20-2015, 10:04 AM
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Didn't have that vin in my database. Vin is actually N146462? not N149492? And casting date on the side of the block is A 20 6?

Car would have been built 2nd/3rd week of March
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post #11 of 17 (permalink) Old 09-20-2015, 10:51 AM Thread Starter
 
 
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Yes; the vin # is N149492. And yes, A206 is cast into the block, left side.
I got the engine as a box of parts with a 1967 Vette I bought decades ago. The Vette had an engine in it so this was an extra. I sold the Vette but kept the spare engine.
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post #12 of 17 (permalink) Old 09-22-2015, 12:08 PM
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It looks more like N146462 in the picture you attached. Can you post a more close up picture? Thanks
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post #13 of 17 (permalink) Old 09-23-2015, 12:30 AM
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And my guess is 145462!
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post #14 of 17 (permalink) Old 09-23-2015, 09:45 AM
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I have never seen a VIN stamp that poorly imprinted (or using that size font). Generally the VIN is stamped further away centered upon the pad so that it is clearly legible for warranty claims.

Big Dave
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post #15 of 17 (permalink) Old 09-23-2015, 09:22 PM
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Quote:
Originally Posted by Darth View Post
And my guess is 145462!
Now that I've seen it blown up like this, I agree!
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post #16 of 17 (permalink) Old 09-25-2015, 07:53 AM
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Quote:
Originally Posted by Big Dave View Post
I have never seen a VIN stamp that poorly imprinted (or using that size font). Generally the VIN is stamped further away centered upon the pad so that it is clearly legible for warranty claims.

Big Dave
That's a typical partial vin stamp on a 65/66 Norwood engine pad.
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post #17 of 17 (permalink) Old 10-03-2015, 01:12 PM Thread Starter
 
 
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I cleaned and examined the numbers stamped on the deck of the block and can quite positively identify them as N146462. The guy who stamped them must not have cared much because he did a crappy job.
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