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240z - fabbing new front rails


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So thanks for the ideas but I figured out that the spring lock won't really work...

The idea will be to rotate the shaft (and the mounted car) using the worm gear.  So if the lock is spring loaded, it will automatically lock at each notch and have to be reset.  

In theory the worm gear will hold the car in place indefinitely and certainly long enough to manually set the locks at each end.

Now that I think about it, one would encounter the same problem with the spring loaded locks even if rotating the car by hand ...

 

 

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13 hours ago, ConVerTT said:

So thanks for the ideas but I figured out that the spring lock won't really work...

The idea will be to rotate the shaft (and the mounted car) using the worm gear.  So if the lock is spring loaded, it will automatically lock at each notch and have to be reset.  

In theory the worm gear will hold the car in place indefinitely and certainly long enough to manually set the locks at each end.

Now that I think about it, one would encounter the same problem with the spring loaded locks even if rotating the car by hand ...

 

 

The rods and springs are meant to easily and quickly  pull out and re-seat. You can forget the springs. Saves you having to use wrenches.

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Made good progress on the rotisserie today!  Tried to power through and finish it but ran out of gas ...oh well ...

6013E50D-6363-4A58-B55F-D987A86471B5.jpeg


Worm drive up and running ...

A4E4D857-8C33-465B-A57A-AB7926F98BF1.jpeg

 And one of the crossbars welded in ...

226A8E1D-987D-42AF-BD60-3342AE20990E.jpeg

 

Gotta weld up the other crossbar and then start laying out the attachment brackets ....

 

 

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So I ran out of mig wire during my least favorite welding activity ...welding jam nuts ...

05675715-7333-49B7-9CF9-0A2592C59775.jpeg

 

So that sucked ... I had set the day aside to weld up brackets and finish the rotisserie .. oh well ?

So I moved on to dropping the gas tank and inspecting the rear bumper brackets ...

CE3AAAFA-BD3C-4C67-9D84-F14675EA74EE.jpeg

It was disappointingly easy ...

It looks the tank has been modded slightly - the circled ports have been crimped and welded shut.  Is this some kind of venting bypass?

D45D17A1-7BF9-4964-8E6C-EBAD2C80955D.jpeg

Off to get some mig wire before they close hopefully ....

 

E69EA0C6-FC97-45C8-9152-79C21603E173.jpeg

Edited by ConVerTT
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Yes, those ports originally connected to hoses that lead up to the vapour recovery/expansion tank behind the passenger side c pillar. The following article shows the way the original system was "plumbed" along with an alternative solution - which appears to be what a previous owner was attempting on your tank.

http://zhome.com/Racing/FuelTankVaporLineMod/FuelTankVaporMod.htm

Hope this helps... and you were able to get yourself "wired".

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29 minutes ago, Persimmon240 said:

Yes, those ports originally connected to hoses that lead up to the vapour recovery/expansion tank behind the passenger side c pillar. The following article shows the way the original system was "plumbed" along with an alternative solution - which appears to be what a previous owner was attempting on your tank.

http://zhome.com/Racing/FuelTankVaporLineMod/FuelTankVaporMod.htm

Hope this helps... and you were able to get yourself "wired".

Thanks Persimmon...

That looks like what the PO must have attempted.  But he used the small 10 mm port as a vent, and routed it back to the filler neck without any additional T.  The vent tank has been removed ... hmmm - not the best ....

Thanks for the link.

 

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23 minutes ago, ConVerTT said:

Is there a T connection at the filler neck?

Here is an image of the fuel tank assembly for up to Aug/74 from the 1976 European parts book. It shows a tee on the filler neck. Looks very similar to what's on my 1970 non-emissions car, without a vapor recovery system.

fuel tank from European parts book.JPG

 

This parts book is available in our downloads section here:

 

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30 minutes ago, ConVerTT said:

Thanks CanTechZ!  

Your welcome. Interestingly the fuel tank on my car originally did not have the extra fittings but when I replaced it in 1988 the only tanks available had them. It was installed by my local Nissan dealership. The mechanic back then closed the extra ports with fuel compatible rubber caps, one is even retained with an OEM wire type clamp, after 32 years the caps are still relatively soft and pliable with no cracks. Here are a couple of pics...

20200424_083007.jpg

20191012_153143.jpg

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1 hour ago, SteveE said:

In the drawing above, where does hose #18 go/attach to?

It's the vent line that runs up, then loops over and goes down thru the floor and vents to atmosphere. Here is a pic from my 7'70 car.

IMG_4573s.JPG

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Back to welding up the rotisserie...today was brackets, brackets, brackets....

758C5FCE-1525-4FAA-ADFD-6F46F24FBBEA.jpeg

The rear bumper mounts have definitely seen better days, but things seemed pretty rigid once the jam nuts were tightened up ....

309AAA6A-7EE0-4757-A533-064B73B5779D.jpeg

Meanwhile up front ....

8E37C59D-3D2F-4401-8CF5-946066A2A44F.jpeg
 

I added an additional plate so I can attach the front to both the bumper mounts and hood hinge mounting points...

C671661C-626D-4B47-9195-72D54567CFB8.jpeg

Still need to drill the mounting holes but it should line up something like this ( with the hood off the car of course )....

AD2FE5C9-7730-4F32-8940-902B9B97DB17.jpeg

getting closer - woohoo!

 

 

Edited by ConVerTT
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Unbolted most of the jig today - basically it is just a two legged dolly now - and I am happy to report that nothing bad happened...no flex, twist or release ....

46DBF2B0-2BFE-4151-8C64-5D5F624EDFA8.jpeg

And chipped out the last of the sound deadening in the trunk ...

185D767C-6329-4F53-8606-6D18CB5A4465.jpeg

...and vacuumed out all the junk.  She hasn't been cleaner in at least 40 years ....


02DA07CE-F3B6-4060-80A6-95487668D7A1.jpeg

4CA584AD-78E6-4A45-BE27-3CF387CCB105.jpeg

...so I think she's "ready to roll". ??

 

Edited by ConVerTT
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