Skip to main content

Dear Engine Board,


I am enclosing pictures of a plain vanilla two bolt main block that has two rear lifter valley drainback holes. I have not seen these before. They *seem* to be factory and not a machine shop modification. Has anybody seen this before? It seems like a good thing for oil circulation.


Chuck Engles

DSC_0007

Attachments

Images (1)
  • DSC_0007
Last edited by George P
Original Post

Replies sorted oldest to newest

Dear George,


The block is at the machinist's right now undergoing sonic testing, cleaning, etc.

The numbers that I found are near the right rear corner, the casting number: DOAE-J and 9K27. The front cover stamped number is: 9K29 G. On the right rear oil pan rail is stamped: K and on the Left is stamped: a 9 or a 6. My decoder seems to indicate nothing particularly special about this block.

Chuck Engles

It seems you have a block cast on October 27, 1969 ... destined for an H code (2 barrel) or M code (4 barrel) motor. Eventually to be installed in a 1970 model Ford or Mercury.

quote:
Originally posted by C. Engles:
... out of my collection of nine Cleveland blocks, probably only three or four have the sinister Xs &Ys in the lifter valley ...



The X&Y markings show up in the D2AE-CA blocks (US mfg ~June '71 - June '74).

If the majority of your blocks do not have the X&Y markings, that would lead me to believe you have mostly D0AE & D1AE blocks in your collection. Do any more of them have the extra drain holes in the lifter valley?

Last edited by George P
Dear George,


Well, the inventory isn't complete. One engine is living well in Pantera no. 2 without any notations of its numbers other than it's sonic test.

The other engines are referenced by the stamped number on the front. Those numbers are:

3 O 25 H

3 C 30 H

A.M.17 (this is a plain vanilla aussie block)

0 J 9 G

1 H 18 J

1 B 1 G

3 K 30 K

9 K 27 DOAE-J *****these are the numbers on the unusual block


Is it possible that the 9K27 mystery block was made in October 1969? If yes, then it would then be a very early casting in my collection.



Chuck Engles

3 O 25 H XXX 25, 1973 (the O is not an O, probably a C or a G)

3 C 30 H March 30, 1973

A.M.17 I don't speak Aussie Ford

0 J 9 G September 9, 1970

1 H 18 J August 18, 1971

1 B 1 G February 1, 1971

3 K 30 K October 30, 1973

9 K 27 DOAE-J October 27, 1969 This is your earliest block

I'm willing at this point to buy into the assumption that those extra holes are a feature that Ford dropped sometime between October 1969 & Septmeber 1970.

I know that Jim Kuntz blocks all the holes in the lifter valley, thus forcing all the oil collecting in the valley to drain forwards through the "rough" knocked-out hole in the front of the valley. Thus lubricating the camshaft thrust plate.

FYI, I know that Jon Kaase, prefers the early 1969 blocks, like your D0AE-J block, because they supposedly have a bit thicker cylinder walls.

Last edited by George P
Post
×
×
×
×
Link copied to your clipboard.
×