Re: IML: 1959 Imperial 413 Question

["Bill Watson" <wwatson5@xxxxxxxxx>]

The 1959 engine number is stamped on the top of the engine block behind the
water pump.

There are a number of errors for the engine numbers from 1959.  First, at no
time did Chrysler stamp "Y" into the engine number for an Imperial.  There
is no way to tell into which car an engine was installed after 1958.

For Imperial engine number prefixes,. starting 1959 :
1959 : MR41-
1960 : P41-
1961 : R41-
1962 : S41-
1963 : T41-
1964 : V41-
1965 : A413-
1966 : B440-
1967 : C440-
1968 : D440-
1969 : F440-
1970 : G440-

The prefix was followed by month/day the engine was assembled.  There may
also be special codes stamped for variations in cylinder bores, crankshaft
journals, compression, performance or special use.

The "R" in the 1959 number stood for "Raised".  This was more important for
the 383 as the American Chrysler Windsor and Saratoga used the RB block 383
while all the other car lines used the (low) B block.  Thus in 1959 you
would find engine numbers ML38- and MR38-.

During the 1968 model year Chrysler began stamping the VIN on the engine,
right side, just behind the engine mount and just above the oil pan.
Although some of the early models had the full VIN, it is usually just the
last eight digits of the VIN.

When the number was moved to the left rear of the block, Chrysler began
using a longer, more detailed engine number :
[Engine Plant] - [Engine Size] - [Special Codes] - [Assembly Date Code] -
[Daily Sequence Number]

As for the statement, "Some references denote the 55 and 56 as a C-73 and
the Crown as the C-70. (If anyone knows for sure...)", actually, Chrysler
knows for sure :
1955 Imperial Custom - C69
1955 Imperial Crown - C70

1956 Imperial Custom - C73
1956 Imperial Crown - C70*

1957 Imperial (base) - IM1-1
1957 Imperial Custom - IM1-2
1957 Imperial LeBaron - IM1-4

The 1956 Crown models used the same model number as the 1955 as there were
few unique changes done to the model.   The C70 used the regular production
front clip and dash, but on the rear the C70 tacked on a fin instead of
being updated with the new rear quarter panels.  Thus Chrysler Engineering
continued the C70 model designation.  Chrysler Engineering added the "*" to
a model designation when it was used for more than one engineering mode year
(which was not always the same as the marketing department's model year)

Also, the VIN did not have a digit for the engine or body style until the
1966 model year.

Bill
Vancouver, BC
.







----- Original Message ----- 
From: "Dawn & Ray Brown" <59imperial@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Thursday, November 10, 2005 7:37 PM
Subject: RE: IML: 1959 Imperial 413 Question


> Thanks for the links, but none of them have the 1851029 listed anywhere. I
> guess its always going to be a mystery. Everything just list the 1852029
>
>
> Reference information?  See below:
>
> http://imperialclub.com/Part/Engine/enginecodes.htm
> http://imperialclub.com/Repair/Engine/index.htm
>
>
>
>
>
>
>
> --- Dawn & Ray Brown <59imperial@xxxxxxxxxxx> wrote:
>
> > I have a 59 Imperial and we took the engine out to do a complete
> > rebuild.
> > When we looked at the block numbers it reads 1851029-6. All of the
> > information I can find out about block nubers is there is a 1852029.
> > Is this a casting error or not a 413? If anyone can help, please let
> > me know. The heads on it is correct for a 59, being only 4 bolt valve
> > covers. Its just the block in question.
> > Thanks
> > Jerry Brown
>
>
>
>



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