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Old 4th May 2010, 23:30   #21
timmay77
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Quote:
Originally Posted by v8haus View Post
I've put the purple powerflex bushes in my thrust arms wich are the 2nd hardest bushing powerflex make and black being the hardest bushing.I had mine fitted for me and used both washers on each side where used, i strongly suggest you put the one washer you didnt fit where it needs to go other wise you will be needing a new bush in no time. There are a few stories on the net with pics of powerflex bushes being fitted with only one washer and the aftermath is not pretty.I really dont know what all the fuss is about powerflex thrust arm bushes being noisy,harsh ride,etc. If fitted properly you should not have a problem. to say the least I will never go back to bmw thrust arm bushes.
The only way I could possibly get the other washer in is if I removed the bushings and put them in the mill and shaved off a few mm of the bushing. There is NO WAY it will fit without either removing some of the bushing material or bending/adjusting the bushing housing on the frame. There just isn't enough room. I even tried grinding down the flat edge of the washer so it was a wedge to see if it would slide in and make it's own room. No dice, there just isn't physically any more room for the other bushing.
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Old 4th May 2010, 23:52   #22
Bryan@Jlevi SW
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Very interesting writeup, I'll have to get this done as I'm almost positive my thrust arm bushings are shot.

You reused original thrust arms and ball joints? How many miles on them? How do the original ball joints look?

I'm asking because I have 110K on mine and was wondering if I might as well replace the entire thrust arm instead....only problem is you can't get a thrust arm w/o a bushing installed
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Old 4th May 2010, 23:52   #23
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Nice write up .

I am considering this when it is time to replace mine thrust arm bushing as well.

Please report back with the results.
I am interested on the handling feel compare to OEM, and the durability vs. OEM.


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Old 5th May 2010, 05:48   #24
timmay77
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Quote:
Originally Posted by Cal@JleviSW View Post
Very interesting writeup, I'll have to get this done as I'm almost positive my thrust arm bushings are shot.

You reused original thrust arms and ball joints? How many miles on them? How do the original ball joints look?

I'm asking because I have 110K on mine and was wondering if I might as well replace the entire thrust arm instead....only problem is you can't get a thrust arm w/o a bushing installed

Yes I reused the old arms and ball joints. 60k miles, they looked fine. I think you CAN buy the thrust arms without bushings. I will check with my parts guy at EAC Tuning, but I'm pretty sure he can get them without the bushings.
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Old 5th May 2010, 17:40   #25
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Did you order part# PFF5-501? Is there an option on the hardness of the bushing? Sounds like they make different grades/colors but I don't see anywhere to specify a grade.
Greg.
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Old 5th May 2010, 20:32   #26
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Quote:
Originally Posted by timmay77 View Post
Yes I reused the old arms and ball joints. 60k miles, they looked fine. I think you CAN buy the thrust arms without bushings. I will check with my parts guy at EAC Tuning, but I'm pretty sure he can get them without the bushings.
here's a question just to confuse things a bit!...

i read somewhere (can't remember now, sorry) that the e39 models with the m-sport suspension option got uprated steel balljoints.

in my own experiences the difference in quality between genuine oem parts from the stealers and aftermarket patent parts is very marked.

i know it's an expensive way round; but surely if you REALLY care about your car you'd be better off buying genuine bits to start with, then if you're not happy/know you're not going to be happy with the brand new oem bushes, then press them out and fit powerflex or whatever other option you want to go for...
(just my 2p)


also, i'm sure you've heard it all before - there's a lot of hearsay (particularly on internet forums!!!) about the longevity of poly bushes and aftermarket replacements over the oem. basically a lot of people argue that poly bushes in particula don't last as long as their oem rubber counterparts and as a result, they're nice and tight for a while, but once worn they give loads of slop and need to be replaced far more frequently than oem...
myself i cant definitively comment - i've driven plenty of perfomance cars, both with and without poly bushes; the polys were nice, but i never owned or knew anyone that did loads of miles on them, so i cant pass fair judgement.
if it was me personally, i would go with brand new oem as they should be a noticably marked improvement over old, tired bushes anyway.


edit - thanks for the post and the pics by the way, nice write-up

Last edited by pete_griff; 5th May 2010 at 20:34.
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Old 5th May 2010, 21:28   #27
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Quote:
Originally Posted by pete_griff View Post
here's a question just to confuse things a bit!...

i read somewhere (can't remember now, sorry) that the e39 models with the m-sport suspension option got uprated steel balljoints.

in my own experiences the difference in quality between genuine oem parts from the stealers and aftermarket patent parts is very marked.

i know it's an expensive way round; but surely if you REALLY care about your car you'd be better off buying genuine bits to start with, then if you're not happy/know you're not going to be happy with the brand new oem bushes, then press them out and fit powerflex or whatever other option you want to go for...
(just my 2p)


also, i'm sure you've heard it all before - there's a lot of hearsay (particularly on internet forums!!!) about the longevity of poly bushes and aftermarket replacements over the oem. basically a lot of people argue that poly bushes in particula don't last as long as their oem rubber counterparts and as a result, they're nice and tight for a while, but once worn they give loads of slop and need to be replaced far more frequently than oem...
myself i cant definitively comment - i've driven plenty of perfomance cars, both with and without poly bushes; the polys were nice, but i never owned or knew anyone that did loads of miles on them, so i cant pass fair judgement.
if it was me personally, i would go with brand new oem as they should be a noticably marked improvement over old, tired bushes anyway.


edit - thanks for the post and the pics by the way, nice write-up

Did you even READ my original post? Obviously not. I care about my car more than most people, IF you knew anything about me, you would know that. NO ONE uses the OEM bushings, because we all know they fail, and are junk. Most people go with the X5 bushings, which I didn't want to mess with. The Powerflex bushings were the best thing for my car, which I care for like a child. If you read any of the threads about this topic you would know that too. IF you had read my original post, you would have saw this:

Quote:
Originally Posted by timmay77 View Post
I know this is a touchy subject, using Powerflex bushings in the thrust arms. I don't want this thread turning into a heated discussion about it. If you feel this is not the right route, please start another thread and discuss it there......


Start a new thread and discuss your opinion there please.....

Last edited by timmay77; 5th May 2010 at 21:30.
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Old 5th May 2010, 21:31   #28
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Did you order part# PFF5-501? Is there an option on the hardness of the bushing? Sounds like they make different grades/colors but I don't see anywhere to specify a grade.
Greg.
Check picture #11 in my OP, yes I ordered PFF5-501. I did not know there are hardness options. If there really are, I was not told about it.....
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Old 5th May 2010, 21:54   #29
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Quote:
Originally Posted by timmay77 View Post
Check picture #11 in my OP, yes I ordered PFF5-501. I did not know there are hardness options. If there really are, I was not told about it.....
My question stems partly from V8haus' comment in post #20 which mentions purple and different durometers.

"I've put the purple powerflex bushes in my thrust arms wich are the 2nd hardest bushing powerflex make and black being the hardest bushing."

My bushings need to be replaced and while I like the idea of added response from poly, I'm concerned that a real hard compound would transmit too much harshness on the crappy roads we have in Wisconsin. I don't have any previous experience with poly but do understand the affects of different hardness bushings on both response and feel.
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Old 5th May 2010, 22:16   #30
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Quote:
Originally Posted by timmay77 View Post
Did you even READ my original post? Obviously not. I care about my car more than most people, IF you knew anything about me, you would know that. NO ONE uses the OEM bushings, because we all know they fail, and are junk. Most people go with the X5 bushings, which I didn't want to mess with. The Powerflex bushings were the best thing for my car, which I care for like a child. If you read any of the threads about this topic you would know that too. IF you had read my original post, you would have saw this:





Start a new thread and discuss your opinion there please.....

steady on!

i wasn't having a dig, and i certainly wasn't questioning the integrity of how you look after your car (isn't that why we all use these sorts of forums in the first place?) and after all you've posted on here way more than i have; chances are you've crawled around under your m5 more than i have too!

all i was ASKING/QUESTIONING was the benefits of poly bushes etc over the standard items...
i'm aware of the oem bushes being flawed - i should have said before about using the oem x5 bushes; my bad - i apologise.
replacement of older design bushes with seemingly newer/better items on new models by the same manufacturer is also pretty common.

i wasn't looking to turn this into a pi$$ing contest - just trying to spark a bit of question time over what peoples opinions etc are. please don't think i'm saying what you've installed on your car is WRONG!

i was also questioning what people think about buying after market thrust arms with ball joints that are probably going to be of a different standard to the oem items.


thanks again for your input and the thread in the first place - any discussion over the points i've asked about is all i was after.
(if you really want to discuss it further outside of this thread/forum - please get me at pete_griffiths@hotmail.com)
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