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Old 01-12-2013, 02:55 PM   #1 (permalink)
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Monoball install problems

So started working on the rear of the car, got the upper wishbone in easily.

But, the lower wishbone is giving me problems. I was able to get the front in with some effort. But the rear lower monoball is too wide to fit in the frame.

Did anyone else have this problem? I'm thinking maybe 1/16" or more..

Attached is a picture to show the direction I'm talking about.
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Old 01-12-2013, 03:41 PM   #2 (permalink)
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Look if your oring are correctly set. If the diffence is only by 1/32, try to force to open the frame box a little bit.
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Old 01-12-2013, 03:53 PM   #3 (permalink)
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Okay I will check that. I tried pressing against the frame to compress the orings.

Thanks for the help.
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Old 01-12-2013, 04:27 PM   #4 (permalink)
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I just went through this myself, and was going to post some tips.

Basically, you need to expand the chassis opening a bit. One person recommend using a 3/8 bolt with a few nuts and washers. With the wishbone removed, put the bolt partly through the chassis opening through the bushing bolt hole, put the two nuts on (in the space where the bushing goes, and thread them up the bolt so that the bolt goes through the second hole. Then use the nuts to spread the opening. Not too much (you are just trying to create a little outward bend). Then remove, and the opening will be slightly expanded. The nice thing about this approach is it puts the force of expansion on the reinforcing black steel pads.

The other way I used (sometimes in combination with the above) as to get a 5/16 inch diameter short bolt (e.g., 1 inch or a bit more in length) with a long 5/16 inch coupling nut (normally used for coupling two thread rods) I screwed the bolt all the way into the nut, and with the wishbone in place, put the combo in the opening somewhere near the middle as close as I could get. Then, unscrew the nut/bolt combo to put expansion force on the aluminum walls. You will then be able to slip the bushing into place.

I have a attached a few pictures. The second one, using the expander made of a bolt and a coupler nut, shows a 3/8 inch diameter bolt version. However, that nut was really a bit too long, and I went down to the 5/16 inch diameter nut which was shorter.

I intend to write up some more tips in another thread, but that should get you past your current problem.
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Old 01-12-2013, 05:33 PM   #5 (permalink)
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Quote:
Originally Posted by redcar9 View Post
So started working on the rear of the car, got the upper wishbone in easily.

But, the lower wishbone is giving me problems. I was able to get the front in with some effort. But the rear lower monoball is too wide to fit in the frame.

Did anyone else have this problem? I'm thinking maybe 1/16" or more..

Attached is a picture to show the direction I'm talking about.
I measured the old bushings, then mixed and matched the monoball parts to get the closest.
There's enough variation in the spacers that I didn't need to expand anything.
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Old 01-12-2013, 09:41 PM   #6 (permalink)
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I did the measurement and mix-and-match approach as well, but still needed to expand.
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Old 01-13-2013, 07:16 AM   #7 (permalink)
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ChrisH,

THANK YOU SO VERY MUCH!!!!!!

This needs to be a sticky in the mod section.
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Old 01-13-2013, 11:03 AM   #8 (permalink)
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Another trick is to measure the old bushings with calipers. Then sand down the new ones to match up. That way the frame doesn't have to be pushed to far out.

FYI... The old bushings are sloppy junk compared to these things.
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Old 01-13-2013, 07:24 PM   #9 (permalink)
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Originally Posted by redcar9 View Post
Another trick is to measure the old bushings with calipers. Then sand down the new ones to match up. That way the frame doesn't have to be pushed to far out.

FYI... The old bushings are sloppy junk compared to these things.
I considered that as well, but was concerned that I wouldn't sand it properly square on the end. On some of mine, I would have needed to sand off up to about 0.4 mm (total for the bushing).
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Old 01-13-2013, 07:27 PM   #10 (permalink)
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ChrisH,

THANK YOU SO VERY MUCH!!!!!!

This needs to be a sticky in the mod section.
Once I write up the full set of tips, then that can be a sticky.
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Old 07-05-2013, 01:44 AM   #11 (permalink)
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Hi,

I'm just about to install my monoballs but don't have the instructions. Contacted Sector111 but havn't recieved a reply yet.

Just wan to know, do I need to grease the bearings before pressing them into the wishbone? What kind of grease?

Cheers
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Old 07-05-2013, 01:53 PM   #12 (permalink)
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Hi,

I'm just about to install my monoballs but don't have the instructions. Contacted Sector111 but havn't recieved a reply yet.

Just wan to know, do I need to grease the bearings before pressing them into the wishbone? What kind of grease?

Cheers
No grease. They should go in dry. the outer sleeve is only held in place by friction. You don't want them to slip inside the wishbone while you are driving.
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Old 01-02-2014, 08:30 AM   #13 (permalink)
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I also ran into this problem. I'm waiting for my A-arms to get back from the powdercoaters so I test fitted only the monoballs. Sure enough, the boxed sections in the front are just a hair to narrow. Same going for the sections on the lower front control arm I tried compressing the inner sleeves and no cigar. And drumroll... the rear outboard control arm space (by toe link brace) is a hair too narrow too Nothing is easy with this car! At least all the rest of them fit.

As easy as it looks, I can't bring myself to bending up my fancy aluminum car. I'm just going to sand down the inner sleeves with a disc sander till they fit perfectly.
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Old 01-03-2014, 07:11 AM   #14 (permalink)
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Buy a file. Easy button. I've enjoyed my spheracles for about a trouble free season of auto-x and a few thousand street miles. No drawbacks as I can see.
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Old 01-03-2014, 07:20 AM   #15 (permalink)
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Hmm that might be a better idea. I don't feel doing the sob story "can I borrow this dad" talk. I'll probably never use a disc grinder again for a really long time.
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Old 02-05-2014, 07:40 AM   #16 (permalink)
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Any more tips??

Quote:
Originally Posted by ChrisH View Post
Once I write up the full set of tips, then that can be a sticky.
I'm just starting the install and have one side on front disassembled. MonoBalls are supposed to come in today.

Are there any more tips on the install?

Is anybody using some sort of threadlocker or similar to secure the bushing?

I have the "tool" and it worked perfectly in pressing the old bearings out.

Any more pointers would be greatly appreciated.

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Old 02-05-2014, 07:47 AM   #17 (permalink)
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Also, on the lower rear arms, is the front using a captive fastener?

If so, is that the only one?

Also, will be changing caster in the process. Anything new there?

And finally, is this the best thread on MonoBalls install??

Thanks,

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Old 02-05-2014, 07:57 AM   #18 (permalink)
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The press fit needs to be dry. All mine were about a 3-4 thousandths interference fit, which is plenty. Putting the sleeves in the freezer really helps.

The rear inboard control arm bushing has a captive nut, the rest are all straigh through bolts to loose nuts.

I would measure each opening in the chassis to see if you're going to run into trouble. Every car seems to be different.
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Old 02-05-2014, 09:03 AM   #19 (permalink)
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Man I want to change out these bushings but don't want to have to bend the frame.
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Old 02-05-2014, 09:07 AM   #20 (permalink)
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No grease. They should go in dry. the outer sleeve is only held in place by friction. You don't want them to slip inside the wishbone while you are driving.
Yeah. That happened on the front of my Europa once. Spooky.
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