KA24DE mystery part - dowel pins for?

[xSeraphin]

I bought a torn down KA24DE and am slowly putting it back together. I've come across 2 solid metal pins that I have no idea what they go to. Any help would be greatly appreciated.

In this picture they are next to the hollow alignment dowel pin for the cylinder head.
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0835.JPG

[Memberofthe600hpkaclub]

Dowel pins look like the bellhousing alignment dowels and the other is a head alignment dowel

[xSeraphin]

Dowel pins look like the bellhousing alignment dowels and the other is a head alignment dowel

I see a dowel pin in the block above the flywheel side freeze plug. It's a bit smaller than these two. There is a hole near the crankshaft on the flywheel side where the pins fit. There is only one hole. I don't have a transmission/housing so I can't compare the pins that way.

[xSeraphin]

So far the closest thing I can find to fitting these pins is the hole near the flywheel for the transmission bell housing but that's still only 1 hole. I think what I'll need to do is visit a junkyard and strip down and old KA DOHC until I figure out where they go.

[xSeraphin]

After many hours searching the web and service manuals and pictures and forums and everything else I could think of I came across a single clue to what these could be. Part 11021A at nissanpartszone. There is a channel that goes straight through the block. Originally I found a hole the exact size where one of these would fit. Since the oil pump was installed I didn't notice that on the other side of the block was another hole. With the timing cover off I can look straight through the block and see out the other side. This seems to be either a coolant channel and these are freeze plugs or an oil channel. Either way, this is the only place I can figure they go and in every other picture I can find of a KA24DE - the holes are plugged!

Here is the part : 11021A 240SX PLUG-TAPER

1993 Nissan 240SX Cylinder Block & Oil Pan - 1101363 (http://www.nissanpartszone.com/components/1993-nissan-240sx_cylinder-block-oil-pan-110-1363.html)
http://www.nissanpartszone.com/diagrams/small/S13/nissan-240sx-cylinder-block-oil-pan-110h01.png
11024-K0100 - Nissan PLUG - TAPER (http://www.nissanpartszone.com/parts/nissan-plug-taper%7E11024-k0100.html)

http://xseraphin.net/Images/240SX/240SX/1991/DSCN0844.JPG
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0845.JPG
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0847.JPG
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0843.JPG
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0846.JPG
http://xseraphin.net/Images/240SX/240SX/1991/DSCN0848.JPG

[SinGarage]

Looks like a DOWEL-BLOCK TO HEAD. This 2 is used on the block surface (head gasket side) to align or mate when installing the head.

Look at part code 11010A on your link 1993 Nissan 240SX Cylinder Block & Oil Pan - 1101363 (http://www.nissanpartszone.com/components/1993-nissan-240sx_cylinder-block-oil-pan-110-1363.html)

*11010A240SX DOWEL-BLOCK TO HEAD
11053-73400 (http://www.nissanpartszone.com/parts/nissan-dowel~11053-73400.html)1990.07-1993.02KA24DE11010A240SX DOWEL-BLOCK TO HEAD
11053-01M00 (http://www.nissanpartszone.com/parts/nissan-dowel-block-t~11053-01m00.html)1993.02-KA24DE$2.22
$1.78