R32 Gt-r Rear Swaybar D Bush Size

[No Crust Racing]

Putting one of these into my S13, but unsure what D Bush to buy. SuperPro has them up to 24mm, but the bar seems to be 25mm (admittedly measured with adjusting shifter with measuring marks, tape backs this up but both could be 1mm out). I've also read some people state t's 26mm. Nolathane lists odd sizes.

Can any shed one some light on this?

Also do I need to use grease on the bushes when installing them? Seems to be a lot o conjecture around this also.

Edited March 1, 2015 by ActionDan

[GTSBoy]

Um, Shirley this is a function of the actual bar that you have in your possession, and not something that anyone else can know?! Buy cheap plastic vernier calipers from Bunnings or Jaycar, measure and revel in your newfound ability to correctly measure this stuff.

As to the lube - any time urethane touches metal, moly grease goes in there.

[KiwiRS4T]

Not grease - special lube.

[No Crust Racing]

Um, Shirley this is a function of the actual bar that you have in your possession, and not something that anyone else can know?! Buy cheap plastic vernier calipers from Bunnings or Jaycar, measure and revel in your newfound ability to correctly measure this stuff.

As to the lube - any time urethane touches metal, moly grease goes in there.

Are you telling me Nissan just randomly put different sizes rear swaybars in the back of all their cars... surely there's a factory size.

Not grease - special lube.

I have Lithium grease, good enough or is it something more specific and does it normally come with the bushes?

[GTSBoy]

Not grease - special lube.

I use moly grease on all urethane bushes. Always have. Always will.

Are you telling me Nissan just randomly put different sizes rear swaybars in the back of all their cars... surely there's a factory size.

OK, but now you tell us that it's factory. You didn't before. And I'm pretty sure that the factory GTR bar probably isn't that large, although I'm willing to stipulate that it might be. See below for comment on that. The manual GTSt one is ~17 or 18mm or something, the auto GTSt one is only ~13mm. Stiffness goes up with the 4th power of diameter, so 24mm is a hell of a lot stiffer than 18mm, even if comparing hollow with solid.

The heavy duty Whiteline GTR rear bar is 24mm. Not a real big step up from a factory 24mm bar.

[Sinista32]

Try the Nolathane site again. Do the Make/Model search

You will find rear sway bar mount bushing and it will be an ID of 18mm (part#42478)

The rear sway bar you have is likely aftermarket and requires 24mm.

[No Crust Racing]

I use moly grease on all urethane bushes. Always have. Always will.

OK, but now you tell us that it's factory. You didn't before. And I'm pretty sure that the factory GTR bar probably isn't that large, although I'm willing to stipulate that it might be. See below for comment on that. The manual GTSt one is ~17 or 18mm or something, the auto GTSt one is only ~13mm. Stiffness goes up with the 4th power of diameter, so 24mm is a hell of a lot stiffer than 18mm, even if comparing hollow with solid.

The heavy duty Whiteline GTR rear bar is 24mm. Not a real big step up from a factory 24mm bar.

I'll have to get some moly grease then, I only have generic heavy duty industrial and lithium at home.

The bar is definitely 24mm+ I'll buy some verniers and confirm.

Try the Nolathane site again. Do the Make/Model search

You will find rear sway bar mount bushing and it will be an ID of 18mm (part#42478)

The rear sway bar you have is likely aftermarket and requires 24mm.

Yeah I found the 18mm one, but this is much larger.

It could be after market but it was sold as having been removed from a 32 GT-R that was being wrecked, the colour/age implies that also. The same smokey black colour as all the others I've seen where as almost every after market bar I've ever seen was anything but black.

The size surprised me too, concerned it's going to be too stiff for a grip setup.

Edited March 1, 2015 by ActionDan

[warps]

Just use the lithium grease

Shouldn't use a petroleum based grease on poly - many petroleum greases have moly in them, so I'm surprised that just a "moly" grease would be any good.

Lithium grease is made for situations where petroleum greases are not suitable, so perfect for poly bushes.

.

Edit: just had a quick search, and it looks like some (maybe most) moly greases are used in a lithium grease base. These would be OK. I know that they used to put moly into petroleum based greases (when I first came across moly greases 20 odd years ago) so guessed that this was still the case.

Just make sure that whatever grease you use has a lithium base and all should be good.

Edited March 1, 2015 by warps

[Missileman]

silicone base is suitable too, probably optimal, silicone with PTFE or hex Boron Nitride if you want the fancy stuff.

[No Crust Racing]

I'm less worried about the grease and more concerned with getting the right size bush.

Buying verniers tonight.

[Missileman]

Aldi had some cheapies on sale last week.$20

[No Crust Racing]

lol ok.

[Ben C34]

Legend for measuring with a shifter!

Now with the vernier calipers you can still tighten nuts and measure things.

[No Crust Racing]

Seems pretty accurate, I'll check again tonight but I'll be surprised if it's more than 1mm out.

[No Crust Racing]

Brand new digital verniers measured GTR bar at 25.2 and 25.3mm at each bush location. So shifter was right.

Whiteline bar, which is sold as a 27mm came in at 27.3mm.

[GTSBoy]

27mm + paint!

[No Crust Racing]

Got bushes, the rear bushes don't fit the brackets. Too wide. I can;t find anything on needing to put the R32 brackets in though, everyone says it just bolts up.

What am I missing here.

[No Crust Racing]

Nissan says the d bush brackets are different part numbers so I'm starting to think I need the R32 mounts as well.

[No Crust Racing]

Can anyone confirm if an R32 bracket measures the same as this?

[GTSBoy]

Define "too wide". As in "too wide such that if I cut some off it it would be fine"?

FWIW, when I put the 24mm bar on the front of my R32, I spent about a half hour going back and forth between the car and the pedestal buff removing material from the outside of the bracket bushes so that they would fit inside the brackets.