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  #1  
Old 10-09-2018, 02:38 PM
Howm58 Howm58 is offline
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Default Rear subframe bush removal tool

Hi guys,
yet another question for you. I need to make/buy/beg/steal/borrow a tool for removing the mounting bushes on my rear subframe.
Times have moved on & most of the tools on Ebay are for later models!!
Apart from the high tensile threaded rod & nuts I can make most of the parts if need be, so a drawing with dimensions of the correct tool would help enormously.
Howard
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Old 11-09-2018, 04:35 PM
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c_w c_w is offline
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Quickest way IME is to drill what you can out so that you can put a hacksaw blade through it, reconnect the hacksaw and cut through the outer metal of the bush. Once it's through fully down one side (or maybe two cuts to be safe) it can be tapped out. Has to be tapped downwards due to a notch in the subframe which seats the bushes when they are pressed in.
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Old 12-09-2018, 06:26 AM
Howm58 Howm58 is offline
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Cheers,
I hoped that someone on the forum had access to the BMW bushing tool 3026 & could rent it out or at least post some dimensions for it.
I am fitting powerflex bushes so fitting should be fairly painless.
I may have to buy a cheap standard bush off Ebay & get dimensions from it to make the tool.
I have access to a toolroom, so with the correct dimensions should be able to cobble something together.
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Old 12-09-2018, 07:50 AM
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c_w c_w is offline
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Hi, sorry I assumed you were removing the subframe completely but if it's not then the puller is likely necessary. Having said that it doesn't take long to drop the rear end, can be done in under an hour.

I personally would fit stock subframe bushes, but fill the rearmost voids in the bushes to reduce compliance a little. I've also put about 12mm rubber ring above the subframe bush to limit float.
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Old 12-09-2018, 08:48 PM
kwoffa kwoffa is offline
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Stick to OEM bushes....
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  #6  
Old 14-09-2018, 09:57 AM
Howm58 Howm58 is offline
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You have me worried now!!
After reading various forum threads it seems the preferred combination is powerflex purple for the subframe mounts (to fully tame the 'rear steer' tendency) & OEM for trailing arms & diff mount.
I do at the moment have a LOT of twitchyness coming from the back end at speed.
As for extra noise & vibration, we'll just have to wait & see.
Not sure about full subframe removal yet, should become more obvious when I'm actually under there mooching about.
Thanks for the input though.
Howard
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Old 14-09-2018, 10:09 AM
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c_w c_w is offline
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Yes definitely that's the most sporting setup you want on the rear - purple poly subframe bushes with OEM rubber trailing arm bushes. I found the polybushes raised the subframe slightly, and I wasn't convinced by their fitment. Very easy to fit though!

Even a new OEM subframe bush has a lot of movement and that is what gives the car a feeling of looseness, but it can be drastically reduced with rubber spacers above the subframe (stops it floating), and filling the void of the rearmost hole in the bush. You can fill both holes but it creates more noticeable NVH. Years ago you could get hold of "subframe inserts", basically small curved pieces of plastic that slide in to the gaps, I use one on each side.

If you drop the arch liner near the subframe connection you will see what I mean about packing something above the subframe bush; there is around a 12mm gap between the subframe and the body which allows the subframe to float, if you reduce this there is very little or no extra NVH but feels more controlled. I bought some rubber washers and glued them on top of the bush so they'd stay in position whilst refitting the subframe. AC Schnizter suspension kits came with an alloy spacer to fill this void. In either case the subframe needs dropping. You can drop the subframe enough without fully removing it, but it's as good as completely removed by this point.

I got some like this;

https://www.ebay.co.uk/itm/5-x-Bespo...r=551208577370

Using 2 6mm stacked on each side, with a 60mm O/D and 36mm I/D.

Might be worth measuring the gap on the subframe to body to double check though, but this is well worth doing, in addition to filling the rear voids on the bushes IMO
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Old 14-09-2018, 06:56 PM
mnbrennan mnbrennan is offline
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I went with Power flex purple subframe and oem diff and trailing arms. I'm very happy with this setup

I'd recommend removing the entire subframe. Easiest way to remove the subframe bushes is to heat the collar to make the rubber soft and press out. I might be able to help with that. Where are you based?
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Old 14-09-2018, 07:21 PM
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IIRC Martin did you have some kind or tool or press to do yours? I tried heat but it go messy, and after nearly and hour of faffing cut it out. The other side took about 10minutes!
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Old 17-09-2018, 09:59 AM
Howm58 Howm58 is offline
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Thanks for all the responses guys.
I am based in Redditch, Worcestershire. I have received a Meyle original bush that I will use as a pattern to make the necessary 'eared' parts of the pressing tool. I have ordered the 'can' & high tensile allthread from an Ebay tool supplier who found me the nearest sizes at a fairly reasonble price.
Subframe removal is probably the way to go as i will be able to rustproof the rear chassis/floor unhindered, but lowering (& raising) the whole unit on my own worries me a little.
As stated,crawling about underneath the car will probably show me the path to take.
Keep going down to the garage however, looking at the beast & saying "one last blast before he goes up on stands!!!"
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