Flathead oil gallery warning

[Lynn Eades]

Alastair, I thought the long, waisted fitting went into the (top or extra) angled hole, and went down to the cam gear cavity, and that the short fitting went into the main supply from the oil pump(vertical hole.
You however say it is the other way around. Can someone back up Alistairs info to clarify this.
Andrew have you checked any 21 stud motors? (riveted carrier ones)

Just trying to get to the bottom of this for everyone's benefit.

[ajmac]

Lynn,
Here is a photo of the engine as I found it:


There is a standard 't' piece to mount the pressure switch and what looks like a normal fitting in the vertical passage, however this goes into the block around 1.5". For all I know this could be a post war mod, or a British Generator mod as this engine was used as an Altenator driver at some point. I will get a photo of the waisted fitting when I can and post it up. In my view the angled oil return hole used on carriers and a post war mod would just need to be a standard fitting.

The 59A block (1945-48) I have in reserve is a different casting with an angled boss ready to drill and tap into the main oil gallery.

[Andrew Rowe]

Did some measurements today. Local Pattern New Zealand Carrier plug.
The plug is 7/16 inch long with a 3/16 inch hole in it. Thread is 1/4 NPT,
Has a slot at one end so it can be screwed into the halfway point in the horizontal gallery.

[Lynn Eades]

Alistair, The "boss" on the back of the engine in your large picture has two holes in it that are there for the gallery drillings, and are otherwise common.
The second pic. (59 block) shows the other "boss' undrilled. That is the one the small diameter long fitting goes in.
The next thing after we have confirmation of this, is the details of the drilling (hole dia.)

Andrew; thanks for the dimensions.

[ajmac]

Originally Posted by Lynn Eades

The second pic. (59 block) shows the other "boss' undrilled. That is the one the small diameter long fitting goes in.

I don't see why is would need to be any kind of special long fitting, the hole drilled into the blank boss just breaks into the main oil gallery / the far end of the horizontal drilling from the large boss. Could you post a photo of the fittings? I can compare with those found on mine. There is a good US site that explains how to modify a standard truck / car block to carrier spec. http://midstateantiquestockcarclub.c...t-heads10.html

[ajmac]

Here is the little blighter...

[Lynn Eades]

Alistair, Great clear pictures. Thank you! It seems you are correct , about the long one going in the outer hole.
Your fitting looks different to the one I have. (unfortunately mine is about as far away as you are from Italy) My one steps down in dia. and stays that way.
What is the part number on yours please?

I have checked in the later parts book (from Michael R)
(it gets tricky because the "engine oil cooler outlet" is the "oil cooler inlet" and vice verca, if you follow?)

The long one is CTL 7142 oil cooler inlet. It later became GAE 8741
The short one is CTL 7143.oil cooler outlet. It later became GAE 8739

I have not yet found any text confirming which fitting goes in which hole.

There is a picture showing the layout of all the cooler fittings valve etc. that someone might like to post for us.

My gut feeling is that the restrictor is all about feeding the mains . / big ends, while the cooler is filling.
I have yet to logic this out, to my own satisfaction.


Here is a picture from an un-recalled source.