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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 12-23-2010, 04:15 AM   #1
Dan Rodriguez
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RTAB preload with coilovers?

I am lowered to 13.5/13 and am about to install OEM RTABs with RE limiters. Can anyone tell me a good method of preloading them? I have searched the forum, read the TIS, and read the Bentley manual. These instructions and the BMW tool (33-3-280) all assume stock ride height.

Please leave the poly vs OEM debate out of it. I've read plenty of those threads already and I know you don't have to preload poly RTABs. I have the OEM RTABs and limiters in hand already and they are going on. I just want to do it correctly.

Thanks in advance!
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Old 12-23-2010, 06:33 AM   #2
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If you use the Vorshlag limiters and oem bushings, the things seem incapable of retaining preload even when fully torqued. I don't think the preload is important functionally - it's just something that has to be kept in mind so you're not tweaking the heck out of the bushing. So my suggestion, to keep things simple, is use the Vorshlag limiters or another option that sidesteps preload. Or you could just extrapolate the angle difference based on your drop vs standard specs.
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Old 12-23-2010, 07:17 PM   #3
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You drive the carbon black M3, right? Let me know if you need any help. The auto skills center on Yongsan has a long pry bar you can use to line up the leve of the bushing carrier and the middle of the hub. I just eyeballed my RTAB last year.

Your real problem will be trying to find a good alignment place that can actually align your car and get your car on the lift. The only place that I could find is in Kangnam.
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Old 12-25-2010, 11:07 PM   #4
Dan Rodriguez
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Quote:
Originally Posted by McSpeed View Post
If you use the Vorshlag limiters and oem bushings, the things seem incapable of retaining preload even when fully torqued. I don't think the preload is important functionally - it's just something that has to be kept in mind so you're not tweaking the heck out of the bushing. So my suggestion, to keep things simple, is use the Vorshlag limiters or another option that sidesteps preload. Or you could just extrapolate the angle difference based on your drop vs standard specs.
For me the biggest function of the preload is to maximize the life of a bushing with a notoriously short life. I don't know if the Rogue limiters are any easier or harder to preload. I will just try to get these as close as I can. Hopefully by the time these crap out I'll be somewhere with better roads. Then I'll put on Powerflex poly bushings which may or may not increase NVH depending on who you ask.
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Old 12-25-2010, 11:16 PM   #5
Dan Rodriguez
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Originally Posted by bigjae1976 View Post
You drive the carbon black M3, right? Let me know if you need any help. The auto skills center on Yongsan has a long pry bar you can use to line up the leve of the bushing carrier and the middle of the hub. I just eyeballed my RTAB last year.

Your real problem will be trying to find a good alignment place that can actually align your car and get your car on the lift. The only place that I could find is in Kangnam.
That's me! I appreciate the offer. It looks fairly simple and I have the MIS RTAB tool so I should be good. I had hoped to do this over the Christmas break but my wheels/tires got put on the slow boat to Korea so they won't be here until mid January. I want to do RTABs/wheels/alignment as close together as possible so it will still be a couple more weeks.

Please let me know what alignment shop you used. I had planned on just using the Bundang BMW dealership but didn't think about possible issues getting on their lift. Kangnam is on my way home from Yongsan anyway. I know there are a lot of performance oriented shops around there vs. my dealership who mainly sees 5/7 series cars. Do you know if they do corner balancing?

P.S. Glad your car is back on the street. I saw it at the auto shop a few weeks ago and was wondering what was going on. I just saw your thread about your clutch. Sucks being in Korea sometimes!
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Old 12-26-2010, 03:21 AM   #6
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Quote:
Originally Posted by Dan Rodriguez View Post
That's me! I appreciate the offer. It looks fairly simple and I have the MIS RTAB tool so I should be good. I had hoped to do this over the Christmas break but my wheels/tires got put on the slow boat to Korea so they won't be here until mid January. I want to do RTABs/wheels/alignment as close together as possible so it will still be a couple more weeks.

Please let me know what alignment shop you used. I had planned on just using the Bundang BMW dealership but didn't think about possible issues getting on their lift. Kangnam is on my way home from Yongsan anyway. I know there are a lot of performance oriented shops around there vs. my dealership who mainly sees 5/7 series cars. Do you know if they do corner balancing?

P.S. Glad your car is back on the street. I saw it at the auto shop a few weeks ago and was wondering what was going on. I just saw your thread about your clutch. Sucks being in Korea sometimes!
Thanks...it was a joyous day when I fired it up and it moved without someone else pushing it!

I have the place programmed into my GPS...you can borrow it whenever you go. You'll need to take a translator and specs if you want something outside of OEM. Not sure if they do corner balancing, that might be hard to find here in Korea.
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