I finally split my 1.7 case, pics added Options

[rwilner]

I was told this engine came from a 1.7 that was in a 914. I'm tearing it down to rebuild into a 2056.

First, I found an M12 or M14 triple square bolt with a spring under it. This bolt is located between two pushrod tubes. I'm guessing this is the oil pressure relief since I didn't find the giant slotted plug I was expecting to find...true?

Second, there is no windage tray. Did the early motors not have a windage tray? Should I source one and install it? I don't see anyplace in the casting that would receive the tray...

Third, I didn't find the serial number where I expected it to be -- in front of the breather tower. Where else could it be?

It seems like a low mile case to me...lifters and cam bearings show minimal wear, the cam looks to even be reusable to my untrained eye. If I had to guess i'd say this was a low-mile motor that got parked due to FI problems or something.

have no pics but will post some tonight.

[Valy]

(IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif)

You got pretty much all the answers already so not going to repeat them.
If you decide to add a windage tray take a look at my build (in my signature) and make sure the oil pick-up length stays the same length as your original pickup.
In my opinion, the tray helps keeping some oil close to the crank to be splashed on the cylinders and pistons for cooling. It also keeps the oil foam there that's easier to be thrown on the cylinders.
The hot oil is very liquid and will go down in the sump quite fast.

The serial number should be either in front of the oil breather or on top of the case above cylinder #3.
You may also have a replacement case that has no S/N. I have one that was stamped by some shop with a new SN.

Post a picture of the cam and lifters. They might look OK but rarely are. Measure the cam lift (diameter across the lobe less the diameter at 90deg). You should get 7.677mm and 7.192mm for the stock cam. Check the top of the lobe for a small depression. If you see it, the cam is dead (There is a picture in my rebuilt). That depression is caused by the lifters pressing on the sides of the lobe and those forces concentrating below the surface of the lobe, in its middle. The metal is compressed there and the sealing collapses creating the small depression.
Take two lifters and mat their faces. They should rock a bit as the faces are a bit like this )( . You can look at them against a light source and see light passing on the sides. If they are flat or like this (), you need new ones.

Hope it helps.