The Quick/Small/(Stupid?) Question Thread-take 2

[notoptoy]

Looks like you are missing the grills?

[mraitch]

Have grills (3d printed) , but never sure exactly what Nissan intended them to do. Fragile, wide open, stops keys perhaps, but just wanted to get 'maximum' heat from the box to the windshield, Will try suggestion

[krispoulin]

I'm just curious if anyone can tell me about the cover on the back of the water pump on the right in this photo. In the photo, you can see that the hole on the right is a different shape. Also, its cover is about twice as thick as the one on the left. I'm just wondering if the cover on the right is from a later model Roadster or maybe from another Datsun altogether. Anyone recognize this thing?

Thanks.

IMG_1526.JPG

[C.Costine]

I'm just curious if anyone can tell me about the cover on the back of the water pump on the right in this photo. In the photo, you can see that the hole on the right is a different shape. Also, its cover is about twice as thick as the one on the left. I'm just wondering if the cover on the right is from a later model Roadster or maybe from another Datsun altogether. Anyone recognize this thing?

Thanks.

IMG_1526.JPG

I wouldn't worry about the difference in the holes. That sort of thing changes from one manufacturer to another, and Nissan could have changed supplier every other year. So far as thickness, whether that makes a difference or not depends on how the pulleys line up.

[notoptoy]

^and how long your bolts are.

[2mAn]

Uncovering fun stuff by 2mAn

Are these for the original Voltage Regulator? Mine has a hacked and aftermarket setup that is getting removed and replaced with a GM "single-wire" setup. I believe these are the wires I need.

Can anyone confirm this and help identify each wire? I think they are:
Gray/Black
White/ Black
?
?

I will confirm the other two colors when I get home

[Curtis]

Yup. Large white wire. Small black, yellow, white, white with black stripe.

[krispoulin]

I'm curious again about these water pumps I have.

How do the fan hubs attach to the shaft? I don't see a key or any signs of welding. Heat 'em up and cool 'em down?

I got thinking about this when I noticed that the hub on one of these water pumps is about 1/4" forward, off the shaft. (See photo.) It apparently was that way since I bought the car and does not line up with the pulleys on my other engine. Engine numbers are 20009 and 29611, so they're both older versions.

Anyway, just curious.

IMG_1531.JPG

[spl310]

Press fit

[2mAn]

Yup. Large white wire. Small black, yellow, white, white with black stripe.

Does this look correct? Got this from the 69/70 Wiring Schematic
https://drive.google.com/file/d/1rJafTJ ... ac2Yu/view

Large white wire = Ignition? Sheet shows a black with white wire going to ignition
Small black = Ground -> Alternator
yellow = Neutral (?) -> Alternator
white = Amp
white with black stripe = Field (?) -> Alternator

I need to go and strip back more of the wrapped up/ hacked wiring and hopefully mine is closer aligned with the schematic shown, but this is a good step forward, thank you

[Curtis]

Look at this.

http://www.kendo-usa.org/datsun/datsun_ ... out_68.pdf

[2mAn]

Thanks Curtis

[Nissanman]

Krispoulin: as mentioned they are a press fit.
If alignment is out you can press/pull the hub backward/forward to correct.

[Cyclewrks]

How hard is it to find a set of U20 cam towers? Trying to decide if I am going to try to rebuild the U20 I have that is missing some key parts (cam towers, valve cover, water outlet, crank pulley to name a few) or scavenge it for parts to build a stroker R.

[spyder]

Press fit

Regarding press fit, I had a flange come off the pump shaft sitting at work idling down from a romp. The fan blade destroyed the aluminum radiator. I now use a Dremel tool to score a grove in the shaft so I can add a snap ring.