TheSaint

I was looking at some pictures of 1963-67 Corvette engines and there is a couple of things i wonder if any here have an answer to

On the picture to the left the engine pad have "OWA" stamped.
Any know what OWA means?


Is the engine on the picture in the middle a Towanada engine since it do not have the front plug as the Flint engines have?
It have a raised area where the fitting is supposed to be but no fitting

Any know what the bolt on the oil fill pipe on the picture to the right is for?

Godholio

The bolt looks like it's plugging the PCV hole.

TheSaint

Thanks Godholio That explains the oil fill tube

65 Pro Vette

A lot of engine builders stamp there Co. name or owners initials into that pad.

jim lockwood

First picture, the pad has an RE suffix. My aging memory wants me to believe that's for a 340 HP engine (or maybe 365.... not sure when that code was retired). But wait..... that's a single pyramid head.... not what was used on either 340 or 365 engines.

Or have I just not yet had enough coffee today?

Jim

327carguy

The RE looks like an over stamp of the "E". The RE code was used in 62 and 63 for the 340 hp engine and again in 64 for the 365 hp engine.

I know this will start some additional posts, but here goes anyway. Tonawanda block were cast with and without the plugs. Tonawanda truck engines had the boss. The boss was used for an oil fitting. You can also find these Tonawanda truck engines with a plug. I have. The casting date on the rear of the block will still be wrong because of the extra digit. The Tonawanda blocks will also have a "T" casting mark. It is not a projected letter that could be ground off. It will be a depressed letter. It is normally found above the bellhousing mounting surface.

The power pack head was not used on the RE engines.

OC-1

Casting date on back of engine for flint would be, for example, D113
Wanda would show D1163 for an April 11th 1963 cast date.

DZAUTO

Yes, the Flint blocks get the hole in the front of the block and the Tonawanda blocks do not get the hole. BUT, that flat place on the Tonawanda block is where a hole can be drilled and tapped for an oil fitting. If you observe INSIDE the lifter valley, you will see there is a boss which is the same as in the Flint block. The passage that is in the Flint block goes into the center oil galley. If it is desired to have this oil passage drilled and tapped into a Tonawanda block, it is TOO EASY to do. I do it on many Tonawanda blocks that I build. On all of my personal engines, I always install an oil pressure gauge into this hole.

TheSaint

It looks to me like like the suffix was RF and have been stamped so it looks like RF


The i know how to tell the difference of Flint and Towanada engine blocks if i do not see the F or T stamped on the engine block


When looking at the white arrow on the head on the picture.
I suppose that is why it is called a single pyramid head?

jimh_1962

The machine shop stamped my name on the crank. Plus my initials are on the engine. He does this to keep track of who owns what.

TheSaint

One more thing is that the hole for the plug seems to have no threads but i might be because of the engine paint is hiding the threads?

JohnZ

That hole takes 1/8" NPT tapered pipe threads.