Stupid Question Time: Did some 1500S models not have a K engine?

[Ossipon]

I just realized my 1964 Notch1500S does not have a K engine. It has a 1500/1500A engine. I know origin details (Purchased in Spain, 1964) and know the history of PO and OO. (I am the third owner)
It has all the other bits of being an S with Dual Solex and License tag cover saying 1500S. But the engine number is 10178058. That would make the engine being built in 1963 by my guess. The front plate number would have it built in March 1964 (0414261).
Am I missing something obvious? Or when I tear into the engine, should I just plan on it being a 1500?
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Ossipon
VWs in my life:
Air
Type 1 - 59, 62, 63, 71 Super 68 KGhia/ Type 2 - 59 Single Cab / Type 3 - 64 Notch
Water
GTI 83, Jetta 81, 85, 87, 91 TDI, 98 TDI, 09 / New Beetle 99 / SportWagen 05, 13 / Tiguan 18 / T3 92

[Erik G]

Engine #10178058 is June of 1965, not sure where you got 63 from or why you thought a 64 should have a "K motor"

https://www.thesamba.com/vw/archives/info/serialnumberst3.php

it's very common for these cars to have replacement motors and non original parts inside the case. It is much rarer and special when they have their original engine

[Ossipon]

[Slow 1200]

is that a 1 or a T?

[260KMN]

Looks like it could be a T and to the left of the T is what could be the vw recon roundel. Give it a wipe and re photo so we can see better.

[Erik G]

Agreed, that looks to be a T0 case

[Ossipon]

[Bobnotch]

[janerick3]

VW engine numbers did not gain the letter prefix until the start of the 1966 model year.

Sometime during the 1965 model year, cases started getting stamped with the engine type letter, together with the VW logo, near the engine number, but not immediately in front of it.

For what it's worth:
K = 1500N
R = 1500S
T = 1600
U = 1600 FI

The 1500S required premium fuel, as indicated under the hood. Otherwise, you risked burning a hole through one of the domed pistons. The 1600 ran on regular octane gas.
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Thanks,
Jan K.

[Tram]

Your engine looks to be an early August 1965 1600, one of the first ones.
Don't despair that it's not the "original" as it looks to be a dealer documented replacement. These things happened more than people realize. If the original owner was a confirmed Pennzoil or Quaker Sludge oil guy... that crap killed VW engines FAST!

I have a September 1965 912 here with an engine with NO engine number, and the Certificate of Authenticity from Porsche stating that the engine number for this car is "not known". We think that the original engine possibly developed an issue just as it was leaving the factory, and someone grabbed this "no number" engine off the line and stuck it in.

Sometimes weird things happened, both before and at the dealer. It's all part of the history.
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