ToolBoy

New mustache bushing updates?

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    I just burned out my old decrepit mustache bushings and wondering if there is any new availability on a rubber product? I searched and the conversations I found were from 2017. Hoping to not use the urethane ones I bought in the beginning.   . . . and if I use the poly ones do I need to grind off the lip that turns inward in the existing outer shell of the original? Thanks. . . 

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    If you use poly you don't need to make any modifications to the mustache bar.

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    4 hours ago, ToolBoy said:

    and if I use the poly ones do I need to grind off the lip that turns inward in the existing outer shell of the original? Thanks. . . 

    I don't understand what you mean by pointing inwards. The outer sleeves on the original bushes were flared over the mustache bar, unless someone replaced them in the past and didn't flare it properly. Can you post a photo?

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    Thanks for the reply. . .  Bottom of the sleeve lays over and top of sleeve curls in. I helped the removal along with a jigsaw not realizing I might need to keep the sleeve. Does this sleeve need to come out too? Bushing seems to fit snugly an bottom as-is.

    MustacheTop.jpg

    MustacheBottom.jpg

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    The poly bushing will fit even the curled inward side? That would surprise me a little. But to use poly, you leave the sleeve. (Normally both sides would look like the bottom picture - curled outwards. Looks like that bushing has been replaced once already) If you got a stock replacement rubber bushing, the sleeve would have to come out.

    Edited by cgsheen1

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    The poly bushing fits everywhere except the edge where I notched it with my jigsaw. Could I not carefully remove that inward curling flange?    . . . and if not, I haven't seen the stock rubber bushings available. I would prefer those anyway. 

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    The standard poly bushings tend to be too tight anyway, being compressed and passing diff noise in to the cabin.  They made them too thick, or the sleeve too short.   That missing flange on the shell of your old bushing might actually help create a small air gap when the bar is installed.

    Not really clear what you mean by "fit".  Are you saying that you can't get the PU bushing past the ragged edges of the old metal shell?  You might just take a hammer and spread the hole out so you can get the PU in there.  Put everything together including the inner metal sleeve and see how things will end up.  Don't overlook that the outer washers are actually torqued down on the sleeve, not the PU when the bar is installed.  If the sleeve is wider than the PU parts by just a bit that will create an air gap that will block diff noise.

    None of that area back there is precision work.  Don't sweat small problems, you can jam things together as long as the nuts can torque down on the stud properly.

     

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    Thanks, that's great!!  When I said "fit"  I meant they will press in to the old sleeve from the one direction. I'll start by peening that edge out as now it curves in and is way too small and sharp for the bushing to pass. I've heard of some folks drilling 1/8 inch holes in the poly bushings every 90 degrees to soften them up a bit and can be packed with pu lube. Any opinion on that and is there any availability of rubber bushings here?

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    People have been searching for old stock bushings for years.  Not much luck.  eBay is probably your best bet and they'll probably be expensive.

    http://www.carpartsmanual.com/datsun/Z-1969-1978/axle/rear-suspension/29

    https://www.google.com/search?q=55476-N4300&rlz=1C1SQJL_enUS862US862&oq=55476-N4300&aqs=chrome..69i57j69i60l3&sourceid=chrome&ie=UTF-8

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    I work for a OEM supplier that works with Nissan and am happy to see if we have any contacts to their parts org. Will ask around and see what I can find out. Can someone confirm all of the part numbers required?
     

    55476-N4300 - Mustache Bar Bushing

    55475-N4300 - Serrated Washer

    55474-N4300 - Serrated Washer

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    38 minutes ago, dmuzial said:

    Can someone confirm all of the part numbers required?

    55476-N4300 - Mustache Bar Bushing

    55475-N4300 - Serrated Washer

    55474-N4300 - Serrated Washer

    They are the correct part numbers.

    The top serrated washer is flat and the lower serrated washer is slighting concaved.

    15929288670921488771994.jpg

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    The holes in the washers are also different diameters

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    Those "sleeves" only came on (to the best of my knowledge) later era 280z mustache bars; like '77 or '78.

    On earlier mustache bars there was just the curled around spring steel which the stock bushing was molded into.

    These bushings shredded easily.

    With the sleeves there was less rubber used so the bushings had better longevity.

    The mustache bars with the sleeves I have found have most always had good rubber and have been reusable.

    The sleeved bushings look like they were pressed into place during manufacture.

    I think maybe because both bushings were integrally designed with the mustache bar, they were never meant to be separately replaced.

    Nissan did not offer replacement bushings but they did offer complete mustache bars ( the little rubber/ metal washers were replaceable and available at one point).

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    1 minute ago, dhp123166 said:

    Those "sleeves" only came on (to the best of my knowledge) later era 280z mustache bars; like '77 or '78.

    On earlier mustache bars there was just the curled around spring steel which the stock bushing was molded into.

    These bushings shredded easily.

    With the sleeves there was less rubber used so the bushings had better longevity.

    The mustache bars with the sleeves I have found have most always had good rubber and have been reusable.

    The sleeved bushings look like they were pressed into place during manufacture.

    I think maybe because both bushings were integrally designed with the mustache bar, they were never meant to be separately replaced.

    Nissan did not offer replacement bushings but they did offer complete mustache bars ( the little rubber/ metal washers were replaceable and available at one point).

    @dhp123166 Good insights, thanks! So a few follow up questions:

    • Can the mustache bar on the 240z/260z be retrofitted with the 280z sleeve design? 
    • If not, can the 280z mustache bar be fitted on the 240z/260z? 
    • Are the mustache bar designs different based on differential (e.g. R180 vs R200)
    • If the sleeves individually couldn't be provided, but we could find someone to produce new mustache bars with pressed fittings, would people be willing to pay for the whole assemblage?

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    38 minutes ago, dhp123166 said:

    Those "sleeves" only came on (to the best of my knowledge) later era 280z mustache bars; like '77 or '78.

    Nissan did not offer replacement bushings but they did offer complete mustache bars ( the little rubber/ metal washers were replaceable and available at one point).

     

    Not sure that is correct.  Part #29 is the bushing with the sleeve.  It shows up to 6/71 where there is a change, then through all of the following Z's.  (Sorry for the big space, there's an ad stuck in the quote and I can't delete it.)  p.s. the early 240Z's had the solid rubber coated "washer", the scalloped ones came later.

    http://www.carpartsmanual.com/datsun/Z-1969-1978/axle/rear-suspension/29

    image.png

    image.png

     

    Edited by Zed Head

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    Follow-up to Zed Head's suggestions yesterday. I scored, pounded over and finally removed much of the rolled in part of the remaining bushing sleeve hoping to create that "gap"  and allow the poly bushing to seat. As it turns out the spacer is still shorter than the overall bushing height (3rd photo) so will require considerable compression to get the washers against that spacer. All the big flat washers that came with poly bushings have same hole I.D. Is one able to reuse the stock washers shown above on the poly bushings? 

    Mustache1.jpg

    Mustache2.jpg

    Mustache3.jpg

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    2 hours ago, dhp123166 said:

    Nissan did not offer replacement bushings but they did offer complete mustache bars ( the little rubber/ metal washers were replaceable and available at one point).

    I think they started making for a time, but they stopped about ten years ago. Here is a photo of one and the box with part number.Mustache bar bushing.jpg

    Screenshot_20200623-211812.jpg

    Screenshot_20200623-211351.jpg

    Edited by EuroDat

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    Just about to do this job - and came across this post by total luck!!!

     

    I bought these on eBay a year ago for £60 - they do come up a few times a year.

     

    15bf6cfe4ecee102b376376e49bb7d3c.jpg&key=7f973b5de619f9dd0c33389dab2ef1677abe63720bf9ac6ce17920229a141595

     

    As for serrated washer, I did this with cutting a tension rod bush about 2-3 years ago and it works well!!!

    fd6588c8595dee7b1bacd70e07cbc709.jpgfd6588c8595dee7b1bacd70e07cbc709.jpg

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    Actually I am tripping on these bushings. I just checked the 10 or so mustache bars i have on hand and they all have sleeves, but they are flat inside the circular aperture of the mustache bar.

    When  I saw the sleeve that Toolboy "custom notched" it reminded me of the sleeves I distinctly remember as being sometimes found on late r200 mustache bars.

    Later r200 mustache bars had the original sleeve but there was also an extra bit of metal (which if memory serves was also notched or similar) surrounding the bushing so the rubber cylinder had a smaller diameter and the rubber in these was barely damaged when I would happen upon  them.

    Edited by dhp123166
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    I did a bit of searching and found the thread on the mustache bars where I had downloaded the photos for the 280Z bushes a couple of years back.

    .

    The thread was about the bushes and possible alternatives. @kats posted a lot of photos of all the different variations he came accross on page 2.

    These is also a tool on page 3 made by a someone back in 2011 to flare the outer ring over the mustache bar

     

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    I did a bit of searching and found the thread on the mustache bars where I had downloaded the photos for the 280Z bushes a couple of years back.
    .
    The thread was about the bushes and possible alternatives. [mention=2430]kats[/mention] posted a lot of photos of all the different variations he came accross on page 2.
    These is also a tool on page 3 made by a someone back in 2011 to flare the outer ring over the mustache bar
     

    That is a superb thread and helped solve the mystery of how to get the bush out!

    But what I can’t see and I was hoping was figured out was the alternate bush that is still available. I have NOS ones but what I was wondering is what do you do if you can’t find them but want a rubber bush?

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    5 minutes ago, AK260 said:


    That is a superb thread and helped solve the mystery of how to get the bush out!

    But what I can’t see and I was hoping was figured out was the alternate bush that is still available. I have NOS ones but what I was wondering is what do you do if you can’t find them but want a rubber bush?

    I know of no alternative for the factory rubber bushing. NOS replacement or poly are your only options, I believe.

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    That’s a shame - there’s a part of me that feels there HAS to be one that fits - but better minds than mine have already looked. :(

     

    I only have rubber left on one of my serrated washers. I’m about to cut up a rubber compression rod bush to make one. I did originally with a poly one of the same and it got rid of clonking when hard on the power and hitting bumps / holes in the road. But now I have the moustache bar off, I can better make something out of rubber. Will post up any success once I get around to it.

     

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