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Old 28-09-2017, 07:14 PM
nospark nospark is offline
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Half Shaft Removal- Advice needed

1973 240z
I need to remove a half shaft. The outer flange nuts/ bolts (wheel side) have undone ok. They are 14mm nuts but no lock washers are present. Should they have washers ?

I can't undo the nuts on the differential side of the shaft. I can't get a socket nor a ring spanner over them and an open ended spanner is not fully on the nut. It looks like a previous owner has used imperial 11/18 ths nylon lock nuts (tiny bit bigger than 17mm). I cant feel a head on the bolt on the other (blind) side.

What nuts/bolts should be on the diff side flange ? Should they also be 14mm or are owners modding this diff side with bigger nuts and locking ones.

Any info and advice would be gratefully received. I don't want to pass this job onto a garage but either way I'd like to replace with the proper nuts/bolts.
Ta
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Old 28-09-2017, 08:47 PM
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johnymd johnymd is offline
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I believe they should all be 8mm nuts and bolts with a 12mm head. All would have split washers. The inner ones do often seam harder to undo than the outer ones for some reason. I have on occasions used a pair of mole grips to start the nut moving.
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Old 28-09-2017, 09:21 PM
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They should be the same as the others, m10 which takes a 14mm spanner and have a spring washer
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Old 28-09-2017, 09:21 PM
nospark nospark is offline
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Thanks Johny
I have done more reading over past couple of hours. I'm pretty sure the HEAD diameter on all the nuts/bolts should be 14mm. The outer wheel side nut and bolt is easy to get at.

It seems the inner diff side has a bolt which has a single flat but is mostly round (you can't really see it because its on the blind side). Nissan didn't use a conventional hex bolt here because access is tight. What you have to do is simply tackle the nut/washer that's facing you as the rear side'blind' bolt is not designed to take a spanner. Unfortunately for me rather than have a 14mm head diameter nut a previous owner has used a 17mm head diameter nut and getting a tool on it is very tight. Will try a thin wall box spanner on it tomorrow.
ta
Also read that best to try and reuse the oem bolts as they are well hardened by nissan.
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Old 29-09-2017, 08:24 AM
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johnymd johnymd is offline
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Oops, I stand corrected. Must be the propshaft that's M8.
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Drives:

'73 240z 1JZ-GTE. Was pretty quick. 11.10@132.5mph
'72 240z RHD (4BOA) Being painted Orange. Bodyshop.
'72 240z LHD Black. Sold.
'73 240z LHD Green. Sold.
'73 240z LHD White. Sold - Future race car.
'73 240z LHD Blue. Sold.
'73 260z LHD Orange. Sold to a good home.
'70 240z LHD Yellow. On route and cant wait.
Skyline R33 GTS - Gone
Skyline R34 GTR - Gone
Toyota Surf 3.0TD

Go to: www.240z.me.uk to checkout the cars.
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Old 29-09-2017, 09:19 AM
SKiddell SKiddell is offline
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M10 metric fine (1.25 pitch) the 14mm nut is called a "reduced AF" nut, IE they they are undersized

Reduced AF nuts are available in the interweb. (lock and full)
I use a serrated flange nut from ARP (part number 200-8683) as the stock spilt washer tends to lose its ability to "lock" after a while
The ARP ones state 12mm wrenching but that's incorrect they are 14mm
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Old 29-09-2017, 11:42 AM
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Any advice for getting half-shafts off the diff generally? The nuts won't budge on one side of mine regardless of how much WD40 / Heat / Leverage I seem to apply.
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Old 29-09-2017, 12:41 PM
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MaximG MaximG is offline
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I just wonder if you could remove the drive shaft along with the flange spigot from the diff in one go. Then you would have better access to tackle the issue.
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Old 29-09-2017, 02:45 PM
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Quote:
Originally Posted by Mr_Tenno View Post
Any advice for getting half-shafts off the diff generally? The nuts won't budge on one side of mine regardless of how much WD40 / Heat / Leverage I seem to apply.
With the 14mm diff end nuts, if you take the wheel off you can get get a socket on them and with enough extension bars you can then get a long breaker bar in play in space outside the car.
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Old 29-09-2017, 03:03 PM
nospark nospark is offline
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Thanks for all the advice. I've learned a bit about Nissan fastenings and I guess learning new things is part of what owning an old car is about. Those 17mm nyloc (!) nuts have beaten me. A 17mm open end spanner is just about doable but a danger of rounding the nuts. So its off to a garage next week to sort out.
I then rang Mike easternauto to order the proper 14mm hex nuts (M10 x 1.25 )and missing split washers

A newbie fail on the passenger side shafts/ujoint job but will have a go on the drivers side ujoints when this job is done.
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